P25 work in progress - final commit of TSBK message parsers

src/decode/p25/message/tsbk/ChannelGrant.java

@@ -4,49 +4,20 @@ import alias.AliasList;
 import bits.BitSetBuffer;
 import decode.p25.reference.DataUnitID;
 
-public abstract class ChannelGrant extends TSBKMessage
+public abstract class ChannelGrant extends ServiceMessage
 {
-    /* Service Options */
-    public static final int EMERGENCY_FLAG = 80;
-    public static final int ENCRYPTED_CHANNEL_FLAG = 81;
-    public static final int DUPLEX_MODE = 82;
-    public static final int SESSION_MODE = 83;
     public static final int[] PRIORITY = { 85,86,87 };
     public static final int[] CHANNEL_ID = { 88,89,90,91 };
     public static final int[] CHANNEL_NUMBER = { 92,93,94,95,96,97,98,99,100,
         101,102,103 };
     
-    public enum DuplexMode { HALF, FULL };
-    public enum SessionMode { PACKET, CIRCUIT };
-    
     public ChannelGrant( BitSetBuffer message, 
-                                   DataUnitID duid,
-                                   AliasList aliasList ) 
+    					 DataUnitID duid,
+    					 AliasList aliasList ) 
     {
         super( message, duid, aliasList );
     }
 
-    public boolean isEmergency()
-    {
-        return mMessage.get( EMERGENCY_FLAG );
-    }
-    
-    public boolean isEncryptedChannel()
-    {
-        return mMessage.get( ENCRYPTED_CHANNEL_FLAG );
-    }
-    
-    public DuplexMode getDuplexMode()
-    {
-        return mMessage.get( DUPLEX_MODE ) ? DuplexMode.FULL : DuplexMode.HALF;
-    }
-
-    public SessionMode getSessionMode()
-    {
-        return mMessage.get( SESSION_MODE ) ? 
-                SessionMode.CIRCUIT : SessionMode.PACKET;
-    }
-
     /**
      * 1 = Lowest, 4 = Default, 7 = Highest
      */

src/decode/p25/message/tsbk/ServiceMessage.java

@@ -0,0 +1,45 @@
+package decode.p25.message.tsbk;
+
+import alias.AliasList;
+import bits.BitSetBuffer;
+import decode.p25.reference.DataUnitID;
+
+public abstract class ServiceMessage extends TSBKMessage
+{
+    /* Service Options */
+    public static final int EMERGENCY_FLAG = 80;
+    public static final int ENCRYPTED_CHANNEL_FLAG = 81;
+    public static final int DUPLEX_MODE = 82;
+    public static final int SESSION_MODE = 83;
+    
+    public enum DuplexMode { HALF, FULL };
+    public enum SessionMode { PACKET, CIRCUIT };
+    
+    public ServiceMessage( BitSetBuffer message, 
+    					   DataUnitID duid,
+    					   AliasList aliasList ) 
+    {
+        super( message, duid, aliasList );
+    }
+
+    public boolean isEmergency()
+    {
+        return mMessage.get( EMERGENCY_FLAG );
+    }
+    
+    public boolean isEncryptedChannel()
+    {
+        return mMessage.get( ENCRYPTED_CHANNEL_FLAG );
+    }
+    
+    public DuplexMode getDuplexMode()
+    {
+        return mMessage.get( DUPLEX_MODE ) ? DuplexMode.FULL : DuplexMode.HALF;
+    }
+
+    public SessionMode getSessionMode()
+    {
+        return mMessage.get( SESSION_MODE ) ? 
+                SessionMode.CIRCUIT : SessionMode.PACKET;
+    }
+}

src/decode/p25/message/tsbk/TSBKMessage.java

@@ -3,6 +3,7 @@ package decode.p25.message.tsbk;
 import alias.AliasList;
 import bits.BitSetBuffer;
 import decode.p25.message.P25Message;
+import decode.p25.message.tsbk.osp.control.IdentifierUpdate;
 import decode.p25.reference.DataUnitID;
 import decode.p25.reference.Opcode;
 import decode.p25.reference.Vendor;
@@ -128,4 +129,27 @@ public class TSBKMessage extends P25Message
 		
 		return sb.toString();
 	}
+	
+	protected static long calculateUplink( IdentifierUpdate iden, int channel )
+	{
+		long downlink = calculateDownlink( iden, channel );
+		
+		if( downlink > 0 && iden != null )
+		{
+			return downlink + iden.getTransmitOffset();
+		}
+		
+		return 0;
+	}
+	
+	protected static long calculateDownlink( IdentifierUpdate iden, int channel )
+	{
+		if( iden != null )
+		{
+			return iden.getBaseFrequency() + 
+					( channel * iden.getChannelSpacing() );
+		}
+		
+		return 0;
+	}
 }

src/decode/p25/message/tsbk/TSBKMessageFactory.java

@@ -2,6 +2,10 @@ package decode.p25.message.tsbk;
 
 import alias.AliasList;
 import bits.BitSetBuffer;
+import decode.p25.message.tsbk.motorola.ChannelCWIDUpdate;
+import decode.p25.message.tsbk.motorola.MotorolaOpcode;
+import decode.p25.message.tsbk.motorola.MotorolaTSBKMessage;
+import decode.p25.message.tsbk.motorola.SystemLoading;
 import decode.p25.message.tsbk.osp.control.AcknowledgeResponse;
 import decode.p25.message.tsbk.osp.control.AdjacentStatusBroadcast;
 import decode.p25.message.tsbk.osp.control.AuthenticationCommand;
@@ -10,7 +14,8 @@ import decode.p25.message.tsbk.osp.control.DenyResponse;
 import decode.p25.message.tsbk.osp.control.ExtendedFunctionCommand;
 import decode.p25.message.tsbk.osp.control.GroupAffiliationQuery;
 import decode.p25.message.tsbk.osp.control.GroupAffiliationResponse;
-import decode.p25.message.tsbk.osp.control.IdentifierUpdate;
+import decode.p25.message.tsbk.osp.control.IdentifierUpdateNonVUHF;
+import decode.p25.message.tsbk.osp.control.IdentifierUpdateVUHF;
 import decode.p25.message.tsbk.osp.control.LocationRegistrationResponse;
 import decode.p25.message.tsbk.osp.control.MessageUpdate;
 import decode.p25.message.tsbk.osp.control.NetworkStatusBroadcast;
@@ -19,9 +24,11 @@ import decode.p25.message.tsbk.osp.control.RFSSStatusBroadcast;
 import decode.p25.message.tsbk.osp.control.RadioUnitMonitorCommand;
 import decode.p25.message.tsbk.osp.control.RoamingAddressCommand;
 import decode.p25.message.tsbk.osp.control.SecondaryControlChannelBroadcast;
+import decode.p25.message.tsbk.osp.control.SecondaryControlChannelBroadcastExplicit;
 import decode.p25.message.tsbk.osp.control.StatusQuery;
 import decode.p25.message.tsbk.osp.control.StatusUpdate;
 import decode.p25.message.tsbk.osp.control.SystemServiceBroadcast;
+import decode.p25.message.tsbk.osp.control.TimeAndDateAnnouncement;
 import decode.p25.message.tsbk.osp.control.UnitDeregistrationAcknowledge;
 import decode.p25.message.tsbk.osp.control.UnitRegistrationCommand;
 import decode.p25.message.tsbk.osp.control.UnitRegistrationResponse;
@@ -29,6 +36,9 @@ import decode.p25.message.tsbk.osp.data.GroupDataChannelAnnouncement;
 import decode.p25.message.tsbk.osp.data.GroupDataChannelAnnouncementExplicit;
 import decode.p25.message.tsbk.osp.data.GroupDataChannelGrant;
 import decode.p25.message.tsbk.osp.data.IndividualDataChannelGrant;
+import decode.p25.message.tsbk.osp.data.SNDCPDataChannelAnnouncementExplicit;
+import decode.p25.message.tsbk.osp.data.SNDCPDataChannelGrant;
+import decode.p25.message.tsbk.osp.data.SNDCPDataPageRequest;
 import decode.p25.message.tsbk.osp.voice.GroupVoiceChannelGrant;
 import decode.p25.message.tsbk.osp.voice.GroupVoiceChannelGrantUpdate;
 import decode.p25.message.tsbk.osp.voice.GroupVoiceChannelGrantUpdateExplicit;
@@ -47,14 +57,15 @@ public class TSBKMessageFactory
 	                                      DataUnitID duid,
 	                                      AliasList aliasList )
 	{
-		Opcode opcode = Opcode.fromValue( message.getInt( TSBKMessage.OPCODE ) );
-
 		Vendor vendor = Vendor.fromValue( 
 				message.getInt( TSBKMessage.VENDOR_ID ) );
 		
 		switch( vendor )
 		{
 			case STANDARD:
+				Opcode opcode = 
+					Opcode.fromValue( message.getInt( TSBKMessage.OPCODE ) );
+
 				switch( opcode )
 				{
                     case ACKNOWLEDGE_RESPONSE_FNE:
@@ -97,9 +108,12 @@ public class TSBKMessageFactory
 				    case GROUP_VOICE_CHANNEL_GRANT_UPDATE_EXPLICIT:
 				        return new GroupVoiceChannelGrantUpdateExplicit( message, 
 				                duid, aliasList );
-                    case IDENTIFIER_UPDATE:
+                    case IDENTIFIER_UPDATE_NON_VUHF:
+                        return new IdentifierUpdateNonVUHF( message, duid, 
+                        		aliasList );
                     case IDENTIFIER_UPDATE_VHF_UHF_BANDS:
-                        return new IdentifierUpdate( message, duid, aliasList );
+                        return new IdentifierUpdateVUHF( message, duid, 
+                        		aliasList );
                     case INDIVIDUAL_DATA_CHANNEL_GRANT:
                         return new IndividualDataChannelGrant( message, duid, 
                                 aliasList );
@@ -126,6 +140,18 @@ public class TSBKMessageFactory
                     case SECONDARY_CONTROL_CHANNEL_BROADCAST:
                     	return new SecondaryControlChannelBroadcast( message, 
                     			duid, aliasList );
+                    case SECONDARY_CONTROL_CHANNEL_BROADCAST_EXPLICIT:
+                    	return new SecondaryControlChannelBroadcastExplicit( 
+                    			message, duid, aliasList );
+                    case SNDCP_DATA_CHANNEL_GRANT:
+                    	return new SNDCPDataChannelGrant( message, duid, 
+                    			aliasList );
+                    case SNDCP_DATA_CHANNEL_ANNOUNCEMENT_EXPLICIT:
+                    	return new SNDCPDataChannelAnnouncementExplicit( 
+                    			message, duid, aliasList );
+                    case SNDCP_DATA_PAGE_REQUEST:
+                    	return new SNDCPDataPageRequest( message, duid, 
+                    			aliasList );
                     case STATUS_QUERY:
                     	return new StatusQuery( message, duid, aliasList );
                     case STATUS_UPDATE:
@@ -139,6 +165,9 @@ public class TSBKMessageFactory
 				    case TELEPHONE_INTERCONNECT_VOICE_CHANNEL_GRANT:
 				        return new TelephoneInterconnectVoiceChannelGrant( 
 				                message, duid, aliasList );
+				    case TIME_DATE_ANNOUNCEMENT:
+				    	return new TimeAndDateAnnouncement( message, duid, 
+				    			aliasList );
                     case UNIT_DEREGISTRATION_ACKNOWLEDGE:
                     	return new UnitDeregistrationAcknowledge( message, 
                     			duid, aliasList );
@@ -162,6 +191,19 @@ public class TSBKMessageFactory
 				}
 				
 			case MOTOROLA:
+				MotorolaOpcode motorolaOpcode = MotorolaOpcode.
+						fromValue( message.getInt( TSBKMessage.OPCODE ) );
+				
+				switch( motorolaOpcode )
+				{
+					case CHANNEL_CWID_UPDATE:
+						return new ChannelCWIDUpdate( message, duid, aliasList );
+					case SYSTEM_LOADING:
+						return new SystemLoading( message, duid, aliasList );
+					default:
+				}
+				
+				return new MotorolaTSBKMessage( message, duid, aliasList );
 			default:
 				return new TSBKMessage( message, duid, aliasList );
 		}

src/decode/p25/message/tsbk/motorola/ChannelCWIDUpdate.java

@@ -0,0 +1,184 @@
+package decode.p25.message.tsbk.motorola;
+
+import alias.AliasList;
+import bits.BitSetBuffer;
+import decode.p25.message.tsbk.osp.control.IdentifierUpdate;
+import decode.p25.message.tsbk.osp.control.IdentifierUpdateReceiver;
+import decode.p25.reference.DataUnitID;
+
+public class ChannelCWIDUpdate extends MotorolaTSBKMessage 
+						implements IdentifierUpdateReceiver
+{
+    public static final int[] CHARACTER_1 = { 80,81,82,83,84,85 };
+    public static final int[] CHARACTER_2 = { 86,87,88,89,90,91 };
+    public static final int[] CHARACTER_3 = { 92,93,94,95,96,97 };
+    public static final int[] CHARACTER_4 = { 98,99,100,101,102,103 };
+    public static final int[] CHARACTER_5 = { 104,105,106,107,108,109 };
+    public static final int[] CHARACTER_6 = { 110,111,112,113,114,115 };
+    public static final int[] CHARACTER_7 = { 116,117,118,119,120,121 };
+    public static final int[] CHARACTER_8 = { 122,123,124,125,126,127 };
+    
+    public static final int[] IDENTIFIER = { 128,129,130,131 };
+    public static final int[] CHANNEL = { 132,133,134,135,136,137,138,139,140,
+    	141,142,143 };
+    
+    private IdentifierUpdate mIdentifierUpdate;
+    
+    public ChannelCWIDUpdate( BitSetBuffer message, 
+                                DataUnitID duid,
+                                AliasList aliasList ) 
+    {
+    	super( message, duid, aliasList );
+    }
+
+    @Override
+    public String getEventType()
+    {
+        return MotorolaOpcode.CHANNEL_CWID_UPDATE.getDescription();
+    }
+    
+    public String getMessage()
+    {
+        StringBuilder sb = new StringBuilder();
+        
+        sb.append( getMessageStub() );
+
+        sb.append( " CHAN:" + getIdentifier() + "-" + getChannel() );
+        
+        sb.append( " CWID:" + getCWID() );
+        
+        sb.append( " DN:" + getDownlinkFrequency() );
+        
+        sb.append( " UP:" + getUplinkFrequency() );
+        
+        return sb.toString();
+    }
+    
+    
+    public String getCWID()
+    {
+    	StringBuilder sb = new StringBuilder();
+    	
+    	int char1 = mMessage.getInt( CHARACTER_1 );
+    	
+    	if( char1 != 0 )
+    	{
+    		sb.append( (char)( char1 + 46 ) );
+    	}
+    	else
+    	{
+    		return null;
+    	}
+    	
+    	int char2 = mMessage.getInt( CHARACTER_2 );
+    	
+    	if( char2 != 0 )
+    	{
+    		sb.append( (char)( char2 + 46 ) );
+    	}
+    	else
+    	{
+    		return sb.toString();
+    	}
+
+    	int char3 = mMessage.getInt( CHARACTER_3 );
+    	
+    	if( char3 != 0 )
+    	{
+    		sb.append( (char)( char3 + 46 ) );
+    	}
+    	else
+    	{
+    		return sb.toString();
+    	}
+
+    	int char4 = mMessage.getInt( CHARACTER_4 );
+    	
+    	if( char4 != 0 )
+    	{
+    		sb.append( (char)( char4 + 46 ) );
+    	}
+    	else
+    	{
+    		return sb.toString();
+    	}
+
+    	int char5 = mMessage.getInt( CHARACTER_5 );
+    	
+    	if( char5 != 0 )
+    	{
+    		sb.append( (char)( char5 + 46 ) );
+    	}
+    	else
+    	{
+    		return sb.toString();
+    	}
+
+    	int char6 = mMessage.getInt( CHARACTER_6 );
+    	
+    	if( char6 != 0 )
+    	{
+    		sb.append( (char)( char6 + 46 ) );
+    	}
+    	else
+    	{
+    		return sb.toString();
+    	}
+
+    	int char7 = mMessage.getInt( CHARACTER_7 );
+    	
+    	if( char7 != 0 )
+    	{
+    		sb.append( (char)( char7 + 46 ) );
+    	}
+    	else
+    	{
+    		return sb.toString();
+    	}
+
+    	int char8 = mMessage.getInt( CHARACTER_8 );
+    	
+    	if( char8 != 0 )
+    	{
+    		sb.append( (char)( char8 + 46 ) );
+    	}
+    	
+		return sb.toString();
+    }
+    
+    public int getIdentifier()
+    {
+    	return mMessage.getInt( IDENTIFIER );
+    }
+    
+    public int getChannel()
+    {
+    	return mMessage.getInt( CHANNEL );
+    }
+    
+    public long getUplinkFrequency()
+    {
+    	return calculateUplink( mIdentifierUpdate, getChannel() );
+    }
+    
+    public long getDownlinkFrequency()
+    {
+    	return calculateDownlink( mIdentifierUpdate, getChannel() );
+    }
+
+	@Override
+    public void setIdentifierMessage( int identifier, IdentifierUpdate message )
+    {
+		mIdentifierUpdate = message;
+    }
+
+	@Override
+    public int[] getIdentifiers()
+    {
+		int[] identifiers = new int[ 1 ];
+		
+		identifiers[ 0 ] = getIdentifier();
+		
+	    return identifiers;
+    }
+}

src/decode/p25/message/tsbk/motorola/MotorolaOpcode.java

@@ -0,0 +1,50 @@
+package decode.p25.message.tsbk.motorola;
+
+public enum MotorolaOpcode
+{
+	UNKNOWN_OPCODE_5( "MOTO OPCODE 05  ", "Unknown Opcode 0x05", 0x05 ),
+	SYSTEM_LOADING( "SYSTEM_LOADING  ", "System Loading", 0x09 ),
+	CHANNEL_CWID_UPDATE( "CHAN_CWID_UPDATE", "Channel FCC Callsign Update", 0x0B ),
+	UNKNOWN( "UNKNOWN         ", "Unknown", -1 );
+
+	private String mLabel;
+	private String mDescription;
+	private int mCode;
+	
+	private MotorolaOpcode( String label, String description, int code )
+	{
+		mLabel = label;
+		mDescription = description;
+		mCode = code;
+	}
+	
+	public String getLabel()
+	{
+		return mLabel;
+	}
+	
+	public String getDescription()
+	{
+		return mDescription;
+	}
+	
+	public int getCode()
+	{
+		return mCode;
+	}
+	
+	public static MotorolaOpcode fromValue( int value )
+	{
+		switch( value )
+		{
+			case 0x05:
+				return UNKNOWN_OPCODE_5;
+			case 0x09:
+				return SYSTEM_LOADING;
+			case 0x0B:
+				return CHANNEL_CWID_UPDATE;
+		}
+		
+		return UNKNOWN;
+	}
+}

src/decode/p25/message/tsbk/motorola/MotorolaTSBKMessage.java

@@ -0,0 +1,42 @@
+package decode.p25.message.tsbk.motorola;
+
+import alias.AliasList;
+import bits.BitSetBuffer;
+import decode.p25.message.tsbk.TSBKMessage;
+import decode.p25.reference.DataUnitID;
+
+public class MotorolaTSBKMessage extends TSBKMessage
+{
+	public MotorolaTSBKMessage( BitSetBuffer message, DataUnitID duid,
+            AliasList aliasList )
+    {
+	    super( message, duid, aliasList );
+    }
+
+	protected String getMessageStub()
+	{
+		StringBuilder sb = new StringBuilder();
+
+		sb.append( "SYS:" );
+		sb.append( getNAC() ); /* NAC is the system id for TSBK messages */
+		sb.append( " " );
+		sb.append( getDUID().getLabel() );
+
+		sb.append( " MOTOROLA" );
+
+		if( isEncrypted() )
+		{
+			sb.append( " ENCRYPTED" );
+		}
+		
+		sb.append( " OPCD:" );
+		sb.append( getMotorolaOpcode().getLabel() );
+		
+	    return sb.toString();
+	}
+
+	public MotorolaOpcode getMotorolaOpcode()
+	{
+		return MotorolaOpcode.fromValue( mMessage.getInt( OPCODE ) );
+	}
+}

src/decode/p25/message/tsbk/motorola/SystemLoading.java

@@ -0,0 +1,34 @@
+package decode.p25.message.tsbk.motorola;
+
+import alias.AliasList;
+import bits.BitSetBuffer;
+import decode.p25.message.tsbk.TSBKMessage;
+import decode.p25.reference.DataUnitID;
+
+public class SystemLoading extends MotorolaTSBKMessage
+{
+	public SystemLoading( BitSetBuffer message, DataUnitID duid,
+            AliasList aliasList )
+    {
+	    super( message, duid, aliasList );
+    }
+
+	@Override
+    public String getEventType()
+    {
+	    return MotorolaOpcode.SYSTEM_LOADING.getLabel();
+    }
+	
+	@Override
+    public String getMessage()
+    {
+		StringBuilder sb = new StringBuilder();
+
+		sb.append( getMessageStub() );
+		
+		sb.append( " - " + getMessageHex() );
+		
+	    return sb.toString();
+    }
+	
+}

src/decode/p25/message/tsbk/osp/control/AdjacentStatusBroadcast.java

@@ -6,7 +6,7 @@ import decode.p25.message.tsbk.TSBKMessage;
 import decode.p25.reference.DataUnitID;
 import decode.p25.reference.Opcode;
 
-public class AdjacentStatusBroadcast extends TSBKMessage
+public class AdjacentStatusBroadcast extends TSBKMessage implements IdentifierUpdateReceiver
 {
     public static final int[] LOCATION_REGISTRATION_AREA = { 80,81,82,83,84,85,
         86,87 };
@@ -18,14 +18,17 @@ public class AdjacentStatusBroadcast extends TSBKMessage
         102,103 };
     public static final int[] RFSS_ID = { 104,105,106,107,108,109,110,111 };
     public static final int[] SITE_ID = { 112,113,114,115,116,117,118,119 };
-    public static final int[] CHANNEL = { 120,121,122,123,124,125,126,127,
-        128,129,130,131,132,133,134,135 };
+    public static final int[] IDENTIFIER = { 120,121,122,123 };
+    public static final int[] CHANNEL = { 124,125,126,127,128,129,130,131,132,
+    	133,134,135 };
     public static final int[] SYSTEM_SERVICE_CLASS = { 136,137,138,139,140,141,
         142,143 };
     
+    private IdentifierUpdate mIdentifierUpdate;
+    
     public AdjacentStatusBroadcast( BitSetBuffer message, 
-                                DataUnitID duid,
-                                AliasList aliasList ) 
+    								DataUnitID duid,
+    								AliasList aliasList ) 
     {
         super( message, duid, aliasList );
     }
@@ -50,7 +53,11 @@ public class AdjacentStatusBroadcast extends TSBKMessage
         
         sb.append( " SITE:" + getSiteID() );
         
-        sb.append( " CHAN:" + getChannel() );
+        sb.append( " CHAN:" + getIdentifier() + "-" + getChannel() );
+
+        sb.append( " DN:" + getDownlinkFrequency() );
+
+        sb.append( " UP:" + getUplinkFrequency() );
         
         if( isConventionalChannel() )
         {
@@ -122,8 +129,39 @@ public class AdjacentStatusBroadcast extends TSBKMessage
         return mMessage.getInt( CHANNEL );
     }
     
+    public int getIdentifier()
+    {
+    	return mMessage.getInt( IDENTIFIER );
+    }
+    
     public int getSystemServiceClass()
     {
         return mMessage.getInt( SYSTEM_SERVICE_CLASS );
     }
+    
+    public long getDownlinkFrequency()
+    {
+    	return calculateDownlink( mIdentifierUpdate, getChannel() );
+    }
+    
+    public long getUplinkFrequency()
+    {
+    	return calculateUplink( mIdentifierUpdate, getChannel() );
+    }
+
+	@Override
+    public void setIdentifierMessage( int identifier, IdentifierUpdate message )
+    {
+		/* we're only expecting 1 identifier, so use whatever is received */
+		mIdentifierUpdate = message;
+    }
+	
+	public int[] getIdentifiers()
+	{
+		int[] idens = new int[ 1 ];
+		
+		idens[ 0 ] = getIdentifier();
+		
+		return idens;
+	}
 }

src/decode/p25/message/tsbk/osp/control/IdentifierUpdate.java

@@ -4,22 +4,13 @@ import alias.AliasList;
 import bits.BitSetBuffer;
 import decode.p25.message.tsbk.TSBKMessage;
 import decode.p25.reference.DataUnitID;
-import decode.p25.reference.Opcode;
 
-public class IdentifierUpdate extends TSBKMessage
+public abstract class IdentifierUpdate extends TSBKMessage
 {
-    public static final int[] CHANNEL_IDENTIFIER = { 80,81,82,83 };
+    public static final int[] IDENTIFIER = { 80,81,82,83 };
 
     public static final int[] CHANNEL_SPACING = { 102,103,104,105,106,107,108,
-        109,110,111 };
-
-    public static final int[] BANDWIDTH = { 84,85,86,87,88,89,90,91,92 };
-    public static final int[] BANDWIDTH_VHF_UHF = { 84,85,86,87 };
-
-    public static final int[] TRANSMIT_OFFSET = { 93,94,95,96,97,98,99,100,101 };
-    public static final int TRANSMIT_OFFSET_VHF_UHF_SIGN = 88;
-    public static final int[] TRANSMIT_OFFSET_VHF_UHF = { 89,90,91,92,93,94,
-        95,96,97,98,99,100,101 };
+    	109,110,111 };
     
     public static final int[] BASE_FREQUENCY = { 112,113,114,115,116,117,118,
         119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,
@@ -32,42 +23,20 @@ public class IdentifierUpdate extends TSBKMessage
         super( message, duid, aliasList );
     }
     
-    @Override
-    public String getEventType()
-    {
-    	return getOpcode().getDescription();
-    }
-    
-    public String getMessage()
-    {
-        StringBuilder sb = new StringBuilder();
-        
-        sb.append( getMessageStub() );
-
-        sb.append( " CHAN:" + getIdentifier() );
-
-        sb.append( " DOWNLINK:" + getDownlinkFrequency() );
-        
-        sb.append( " UPLINK:" + ( getUplinkFrequency() ) );
-        
-        sb.append( " BW:" + getBandwidth() );
-        
-        sb.append( " SPACING:" + getChannelSpacing() );
-        
-        return sb.toString();
-    }
-
+    /**
+     * (Band) Identifier
+     */
     public int getIdentifier()
     {
-        return mMessage.getInt( CHANNEL_IDENTIFIER );
+        return mMessage.getInt( IDENTIFIER );
     }
     
     /**
      * Channel spacing in hertz
      */
-    public int getChannelSpacing()
+    public long getChannelSpacing()
     {
-        return mMessage.getInt( CHANNEL_SPACING ) * 125; //Hertz
+    	return mMessage.getLong( CHANNEL_SPACING ) * 125l;
     }
 
     /**
@@ -75,79 +44,8 @@ public class IdentifierUpdate extends TSBKMessage
      */
     public long getBaseFrequency()
     {
-        return mMessage.getLong( BASE_FREQUENCY ) * 5l; //Hertz
+        return mMessage.getLong( BASE_FREQUENCY ) * 5l;
     }
     
-    public boolean isVHF_UHF()
-    {
-        long base = getBaseFrequency();
-        
-        return ( ( 136000000 <= base && base <= 172000000 ) ||
-                 ( 380000000 <= base && base <= 512000000 ) );
-    }
-
-    /**
-     * Channel bandwidth in hertz
-     */
-    public int getBandwidth()
-    {
-        int bandwidth = mMessage.getInt( BANDWIDTH );
-
-        if( isVHF_UHF() )
-        {
-            switch( bandwidth )
-            {
-                case 4:
-                    return 6250;
-                case 5:
-                    return 12500;
-                default:
-                    return 0;
-            }
-        }
-        else
-        {
-            return bandwidth * 125;
-        }
-    }
-
-    /**
-     * Transmit offset in hertz
-     */
-    public long getOffset()
-    {
-        if( isVHF_UHF() )
-        {
-            long offset = mMessage.getLong( TRANSMIT_OFFSET_VHF_UHF );
-            
-            if( mMessage.get( TRANSMIT_OFFSET_VHF_UHF_SIGN ) )
-            {
-                return offset;
-            }
-            else
-            {
-                return -offset;
-            }
-        }
-        else
-        {
-            return mMessage.getLong( TRANSMIT_OFFSET ) * 250l;
-        }
-    }
-    
-    /**
-     * Uplink ( radio to tower) frequency in hertz
-     */
-    public long getUplinkFrequency()
-    {
-        return getBaseFrequency() - getOffset();
-    }
-
-    /**
-     * Downlink ( tower to radio ) frequency in hertz
-     */
-    public long getDownlinkFrequency()
-    {
-        return getBaseFrequency();
-    }
+    public abstract long getTransmitOffset();
 }

src/decode/p25/message/tsbk/osp/control/IdentifierUpdateNonVUHF.java

@@ -0,0 +1,73 @@
+package decode.p25.message.tsbk.osp.control;
+
+import alias.AliasList;
+import bits.BitSetBuffer;
+import decode.p25.reference.DataUnitID;
+import decode.p25.reference.Opcode;
+
+public class IdentifierUpdateNonVUHF extends IdentifierUpdate
+{
+    public static final int[] BANDWIDTH = { 84,85,86,87,88,89,90,91,92 };
+
+    public static final int TRANSMIT_OFFSET_VHF_UHF_SIGN = 93;
+
+    public static final int[] TRANSMIT_OFFSET = { 94,95,96,97,98,99,100,101 };
+    
+    public IdentifierUpdateNonVUHF( BitSetBuffer message, 
+                             DataUnitID duid,
+                             AliasList aliasList ) 
+    {
+        super( message, duid, aliasList );
+    }
+    
+    @Override
+    public String getEventType()
+    {
+    	return Opcode.IDENTIFIER_UPDATE_NON_VUHF.getDescription();
+    }
+    
+    public String getMessage()
+    {
+        StringBuilder sb = new StringBuilder();
+        
+        sb.append( getMessageStub() );
+
+        sb.append( " IDEN:" + getIdentifier() );
+
+        sb.append( " BASE:" + getBaseFrequency() );
+        
+        sb.append( " BW:" + getBandwidth() );
+        
+        sb.append( " SPACING:" + getChannelSpacing() );
+        
+        sb.append( " OFFSET:" + getTransmitOffset() );
+        
+        return sb.toString();
+    }
+
+    /**
+     * Channel bandwidth in hertz
+     */
+    public int getBandwidth()
+    {
+    	return mMessage.getInt( BANDWIDTH ) * 125;
+    }
+
+    /**
+     * Transmit offset in hertz
+     */
+    @Override
+    public long getTransmitOffset()
+    {
+        long offset = mMessage.getLong( TRANSMIT_OFFSET ) * 250000l;
+        
+        if( mMessage.get( TRANSMIT_OFFSET_VHF_UHF_SIGN ) )
+        {
+            return offset;
+        }
+        else
+        {
+            return -offset;
+        }
+    }
+}

src/decode/p25/message/tsbk/osp/control/IdentifierUpdateReceiver.java

@@ -0,0 +1,13 @@
+package decode.p25.message.tsbk.osp.control;
+
+/**
+ * Interface to allow messages to be augmented with IdentiferUpdateXXX type 
+ * messages that provide the channel information necessary to calculate the
+ * uplink and downlink frequency for the channel.
+ */
+public interface IdentifierUpdateReceiver
+{
+	public void setIdentifierMessage( int identifier, IdentifierUpdate message );
+	
+	public int[] getIdentifiers();
+}

src/decode/p25/message/tsbk/osp/control/IdentifierUpdateVUHF.java

@@ -0,0 +1,85 @@
+package decode.p25.message.tsbk.osp.control;
+
+import alias.AliasList;
+import bits.BitSetBuffer;
+import decode.p25.reference.DataUnitID;
+import decode.p25.reference.Opcode;
+
+public class IdentifierUpdateVUHF extends IdentifierUpdate
+{
+    public static final int[] BANDWIDTH = { 84,85,86,87 };
+
+    public static final int TRANSMIT_OFFSET_VHF_UHF_SIGN = 88;
+
+    public static final int[] TRANSMIT_OFFSET = { 89,90,91,92,93,94,95,96,97,98,
+    	99,100,101 };
+    
+    public IdentifierUpdateVUHF( BitSetBuffer message, 
+                             DataUnitID duid,
+                             AliasList aliasList ) 
+    {
+        super( message, duid, aliasList );
+    }
+    
+    @Override
+    public String getEventType()
+    {
+    	return Opcode.IDENTIFIER_UPDATE_VHF_UHF_BANDS.getDescription();
+    }
+    
+    public String getMessage()
+    {
+        StringBuilder sb = new StringBuilder();
+        
+        sb.append( getMessageStub() );
+
+        sb.append( " IDEN:" + getIdentifier() );
+
+        sb.append( " BASE:" + getBaseFrequency() );
+        
+        sb.append( " BW:" + getBandwidth() );
+        
+        sb.append( " SPACING:" + getChannelSpacing() );
+        
+        sb.append( " OFFSET:" + getTransmitOffset() );
+        
+        return sb.toString();
+    }
+
+    /**
+     * Channel bandwidth in hertz
+     */
+    public int getBandwidth()
+    {
+        int bandwidth = mMessage.getInt( BANDWIDTH );
+
+        switch( bandwidth )
+        {
+            case 4:
+                return 6250;
+            case 5:
+                return 12500;
+            default:
+                return 0;
+        }
+    }
+
+    /**
+     * Transmit offset in hertz
+     */
+    @Override
+    public long getTransmitOffset()
+    {
+        long offset = mMessage.getLong( TRANSMIT_OFFSET ) * 
+        		getChannelSpacing();
+        
+        if( mMessage.get( TRANSMIT_OFFSET_VHF_UHF_SIGN ) )
+        {
+            return offset;
+        }
+        else
+        {
+            return -offset;
+        }
+    }
+}

src/decode/p25/message/tsbk/osp/control/NetworkStatusBroadcast.java

@@ -6,7 +6,7 @@ import decode.p25.message.tsbk.TSBKMessage;
 import decode.p25.reference.DataUnitID;
 import decode.p25.reference.Opcode;
 
-public class NetworkStatusBroadcast extends TSBKMessage
+public class NetworkStatusBroadcast extends TSBKMessage implements IdentifierUpdateReceiver
 {
     public static final int[] LOCATION_REGISTRATION_AREA = { 80,81,82,83,84,85,
         86,87 };
@@ -14,11 +14,14 @@ public class NetworkStatusBroadcast extends TSBKMessage
         101,102,103,104,105,106,107 };
     public static final int[] SYSTEM_ID = { 108,109,110,111,112,113,114,115,116,
         117,118,119 };
-    public static final int[] CHANNEL = { 120,121,122,123,124,125,126,127,128,
-        129,130,131,132,133,134,135 };
+    public static final int[] IDENTIFIER = { 120,121,122,123 };
+    public static final int[] CHANNEL = { 124,125,126,127,128,129,130,131,132,
+    	133,134,135 };
     public static final int[] SYSTEM_SERVICE_CLASS = { 136,137,138,139,140,141,
         142,143 };
     
+    private IdentifierUpdate mIdentifierUpdate;
+    
     public NetworkStatusBroadcast( BitSetBuffer message, 
                                 DataUnitID duid,
                                 AliasList aliasList ) 
@@ -44,7 +47,11 @@ public class NetworkStatusBroadcast extends TSBKMessage
         
         sb.append( " SYS:" + getSystemID() );
         
-        sb.append( " CNTRL CHAN:" + getChannel() );
+        sb.append( " CTRL CHAN:" + getIdentifier() + "-" + getChannel() );
+        
+        sb.append( " DN:" + getDownlinkFrequency() );
+        
+        sb.append( " UP:" + getUplinkFrequency() );
         
         sb.append( " SYS SVC CLASS:" + 
                 SystemService.toString( getSystemServiceClass() ) );
@@ -66,6 +73,11 @@ public class NetworkStatusBroadcast extends TSBKMessage
     {
         return mMessage.getHex( SYSTEM_ID, 3 );
     }
+
+    public int getIdentifier()
+    {
+    	return mMessage.getInt( IDENTIFIER );
+    }
     
     public int getChannel()
     {
@@ -76,4 +88,30 @@ public class NetworkStatusBroadcast extends TSBKMessage
     {
         return mMessage.getInt( SYSTEM_SERVICE_CLASS );
     }
+
+    public long getDownlinkFrequency()
+    {
+    	return calculateDownlink( mIdentifierUpdate, getChannel() );
+    }
+    
+    public long getUplinkFrequency()
+    {
+    	return calculateUplink( mIdentifierUpdate, getChannel() );
+    }
+
+	@Override
+    public void setIdentifierMessage( int identifier, IdentifierUpdate message )
+    {
+		/* we're only expecting 1 identifier, so use whatever is received */
+		mIdentifierUpdate = message;
+    }
+	
+	public int[] getIdentifiers()
+	{
+		int[] idens = new int[ 1 ];
+		
+		idens[ 0 ] = getIdentifier();
+		
+		return idens;
+	}
 }

src/decode/p25/message/tsbk/osp/control/RFSSStatusBroadcast.java

@@ -6,7 +6,7 @@ import decode.p25.message.tsbk.TSBKMessage;
 import decode.p25.reference.DataUnitID;
 import decode.p25.reference.Opcode;
 
-public class RFSSStatusBroadcast extends TSBKMessage
+public class RFSSStatusBroadcast extends TSBKMessage implements IdentifierUpdateReceiver
 {
     public static final int[] LOCATION_REGISTRATION_AREA = { 80,81,82,83,84,85,
         86,87 };
@@ -15,11 +15,14 @@ public class RFSSStatusBroadcast extends TSBKMessage
         102,103 };
     public static final int[] RFSS_ID = { 104,105,106,107,108,109,110,111 };
     public static final int[] SITE_ID = { 112,113,114,115,116,117,118,119 };
-    public static final int[] CHANNEL = { 120,121,122,123,124,125,126,127,
-        128,129,130,131,132,133,134,135 };
+    public static final int[] IDENTIFIER = { 120,121,122,123 };
+    public static final int[] CHANNEL = { 124,125,126,127,128,129,130,131,132,
+    	133,134,135 };
     public static final int[] SYSTEM_SERVICE_CLASS = { 136,137,138,139,140,141,
         142,143 };
     
+    private IdentifierUpdate mIdentifierUpdate;
+    
     public RFSSStatusBroadcast( BitSetBuffer message, 
                                 DataUnitID duid,
                                 AliasList aliasList ) 
@@ -47,8 +50,12 @@ public class RFSSStatusBroadcast extends TSBKMessage
         
         sb.append( " SITE:" + getSiteID() );
         
-        sb.append( " CHAN:" + getChannel() );
+        sb.append( " CHAN:" + getIdentifier() + "-" + getChannel() );
         
+        sb.append( " DN:" + getDownlinkFrequency() );
+        
+        sb.append( " UP:" + getUplinkFrequency() );
+
         if( hasActiveNetworkConnection() )
         {
             sb.append( " ACTIVE-NETWORK-CONN" );
@@ -83,6 +90,11 @@ public class RFSSStatusBroadcast extends TSBKMessage
     {
         return mMessage.getHex( SITE_ID, 2 );
     }
+
+    public int getIdentifier()
+    {
+    	return mMessage.getInt( IDENTIFIER );
+    }
     
     public int getChannel()
     {
@@ -93,4 +105,30 @@ public class RFSSStatusBroadcast extends TSBKMessage
     {
         return mMessage.getInt( SYSTEM_SERVICE_CLASS );
     }
+    
+    public long getDownlinkFrequency()
+    {
+    	return calculateDownlink( mIdentifierUpdate, getChannel() );
+    }
+    
+    public long getUplinkFrequency()
+    {
+    	return calculateUplink( mIdentifierUpdate, getChannel() );
+    }
+
+	@Override
+    public void setIdentifierMessage( int identifier, IdentifierUpdate message )
+    {
+		/* we're only expecting 1 identifier, so use whatever is received */
+		mIdentifierUpdate = message;
+    }
+	
+	public int[] getIdentifiers()
+	{
+		int[] idens = new int[ 1 ];
+		
+		idens[ 0 ] = getIdentifier();
+		
+		return idens;
+	}
 }

src/decode/p25/message/tsbk/osp/control/SecondaryControlChannelBroadcast.java

@@ -1,24 +1,36 @@
 package decode.p25.message.tsbk.osp.control;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import alias.AliasList;
 import bits.BitSetBuffer;
 import decode.p25.message.tsbk.TSBKMessage;
 import decode.p25.reference.DataUnitID;
 import decode.p25.reference.Opcode;
 
-public class SecondaryControlChannelBroadcast extends TSBKMessage
+public class SecondaryControlChannelBroadcast extends TSBKMessage 
+								implements IdentifierUpdateReceiver
 {
-    public static final int[] RFSS_ID = { 80,81,82,83,84,85,86,87 };
+	private final static Logger mLog = 
+			LoggerFactory.getLogger( SecondaryControlChannelBroadcast.class );
+
+	public static final int[] RFSS_ID = { 80,81,82,83,84,85,86,87 };
     public static final int[] SITE_ID = { 88,89,90,91,92,93,94,95 };
-    public static final int[] CHANNEL_1 = { 96,97,98,99,100,101,102,103,104,105,
-    	106,107,108,109,110,111 };
+    public static final int[] IDENTIFIER_1 = { 96,97,98,99 };
+    public static final int[] CHANNEL_1 = { 100,101,102,103,104,105,106,107,108,
+    	109,110,111 };
     public static final int[] SYSTEM_SERVICE_CLASS_1 = { 112,113,114,115,116,
     	117,118,119 };
-    public static final int[] CHANNEL_2 = { 120,121,122,123,124,125,126,127,
-    	128,129,130,131,132,133,134,135 };
+    public static final int[] IDENTIFIER_2 = { 120,121,122,123 };
+    public static final int[] CHANNEL_2 = { 124,125,126,127,128,129,130,131,132,
+    	133,134,135 };
     public static final int[] SYSTEM_SERVICE_CLASS_2 = { 136,137,138,139,140,
     	141,142,143 };
     
+    private IdentifierUpdate mIdentifierUpdate1;
+    private IdentifierUpdate mIdentifierUpdate2;
+    
     public SecondaryControlChannelBroadcast( BitSetBuffer message, 
                                 DataUnitID duid,
                                 AliasList aliasList ) 
@@ -42,22 +54,27 @@ public class SecondaryControlChannelBroadcast extends TSBKMessage
         
         sb.append( " SITE:" + getSiteID() );
         
-        sb.append( " CHAN 1:" + getChannel1() );
+        sb.append( " CHAN1:" + getIdentifier1() + "-" + getChannel1() );
         
-        sb.append( " SVC CLASS 1:" + 
+        sb.append( " DN1:" + getDownlinkFrequency1() );
+        
+        sb.append( " UP1:" + getUplinkFrequency1() );
+        
+        sb.append( " SVC1:" + 
         		SystemService.toString( getSystemServiceClass1() ) );
 
         if( hasChannel2() )
         {
-            sb.append( " CHAN 2:" + getChannel2() );
+            sb.append( " CHAN2:" + getIdentifier2() + "-" + getChannel2() );
             
-            sb.append( " SVC CLASS 2:" + 
+            sb.append( " DN2:" + getDownlinkFrequency2() );
+            
+            sb.append( " UP2:" + getUplinkFrequency2() );
+            
+            sb.append( " SVC2:" + 
             		SystemService.toString( getSystemServiceClass2() ) );
         }
-        else
-        {
-        	sb.append( " CHAN 2: empty" );
-        }
+        
         return sb.toString();
     }
     
@@ -71,6 +88,11 @@ public class SecondaryControlChannelBroadcast extends TSBKMessage
         return mMessage.getHex( SITE_ID, 2 );
     }
     
+    public int getIdentifier1()
+    {
+    	return mMessage.getInt( IDENTIFIER_1 );
+    }
+    
     public int getChannel1()
     {
         return mMessage.getInt( CHANNEL_1 );
@@ -80,6 +102,11 @@ public class SecondaryControlChannelBroadcast extends TSBKMessage
     {
         return mMessage.getInt( SYSTEM_SERVICE_CLASS_1 );
     }
+
+    public int getIdentifier2()
+    {
+    	return mMessage.getInt( IDENTIFIER_2 );
+    }
     
     public int getChannel2()
     {
@@ -95,4 +122,64 @@ public class SecondaryControlChannelBroadcast extends TSBKMessage
     {
     	return getSystemServiceClass2() != 0;
     }
+    
+    
+    public long getDownlinkFrequency1()
+    {
+    	return calculateDownlink( mIdentifierUpdate1, getChannel1() );
+    }
+    
+    public long getUplinkFrequency1()
+    {
+    	return calculateUplink( mIdentifierUpdate1, getChannel1() );
+    }
+
+    public long getDownlinkFrequency2()
+    {
+    	return calculateDownlink( mIdentifierUpdate2, getChannel2() );
+    }
+    
+    public long getUplinkFrequency2()
+    {
+    	return calculateUplink( mIdentifierUpdate2, getChannel2() );
+    }
+
+	@Override
+    public void setIdentifierMessage( int identifier, IdentifierUpdate message )
+    {
+		if( identifier == getIdentifier1() )
+		{
+			mIdentifierUpdate1 = message;
+		}
+		else if( identifier == getIdentifier2() )
+		{
+			mIdentifierUpdate2 = message;
+		}
+		else
+		{
+			throw new IllegalArgumentException( "Unexpected identifier update "
+					+ "message for identifier [" + identifier + "]" );
+		}
+    }
+	
+	public int[] getIdentifiers()
+	{
+		int[] idens;
+		
+		if( hasChannel2() )
+		{
+			idens = new int[ 2 ];
+			
+			idens[ 0 ] = getIdentifier1();
+			idens[ 1 ] = getIdentifier2();
+		}
+		else
+		{
+			idens = new int[ 1 ];
+			
+			idens[ 0 ] = getIdentifier1();
+		}
+		
+		return idens;
+	}
 }

src/decode/p25/message/tsbk/osp/control/SecondaryControlChannelBroadcastExplicit.java

@@ -0,0 +1,60 @@
+package decode.p25.message.tsbk.osp.control;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import alias.AliasList;
+import bits.BitSetBuffer;
+import decode.p25.reference.DataUnitID;
+import decode.p25.reference.Opcode;
+
+public class SecondaryControlChannelBroadcastExplicit
+				extends SecondaryControlChannelBroadcast
+{
+	private final static Logger mLog = LoggerFactory.getLogger( 
+			SecondaryControlChannelBroadcastExplicit.class );
+
+	public SecondaryControlChannelBroadcastExplicit( BitSetBuffer message,
+            DataUnitID duid, AliasList aliasList )
+    {
+	    super( message, duid, aliasList );
+    }
+
+    @Override
+    public String getEventType()
+    {
+        return Opcode.SECONDARY_CONTROL_CHANNEL_BROADCAST_EXPLICIT.getDescription();
+    }
+    
+    public String getMessage()
+    {
+        StringBuilder sb = new StringBuilder();
+        
+        sb.append( getMessageStub() );
+        
+        sb.append( " RFSS:" + getRFSS() );
+        
+        sb.append( " SITE:" + getSiteID() );
+        
+        sb.append( " DOWNLINK:" + getIdentifier1() + "-" + getChannel1() );
+        
+        sb.append( " " + getDownlinkFrequency1() );
+        
+        sb.append( " SVC1:" + 
+        		SystemService.toString( getSystemServiceClass1() ) );
+
+        if( hasChannel2() )
+        {
+            sb.append( " UPLINK:" + getIdentifier2() + "-" + getChannel2() );
+            
+            sb.append( " " + getUplinkFrequency1() );
+
+            sb.append( " SVC2:" + 
+            		SystemService.toString( getSystemServiceClass2() ) );
+        }
+
+        return sb.toString();
+    }
+    
+
+}

src/decode/p25/message/tsbk/osp/control/TimeAndDateAnnouncement.java

@@ -0,0 +1,155 @@
+package decode.p25.message.tsbk.osp.control;
+
+import java.text.SimpleDateFormat;
+import java.util.Calendar;
+import java.util.Date;
+import java.util.GregorianCalendar;
+import java.util.TimeZone;
+
+import alias.AliasList;
+import bits.BitSetBuffer;
+import decode.p25.message.tsbk.TSBKMessage;
+import decode.p25.reference.DataUnitID;
+import decode.p25.reference.Opcode;
+
+public class TimeAndDateAnnouncement extends TSBKMessage
+{
+	public static final int VALID_DATE_INDICATOR = 80;
+	public static final int VALID_TIME_INDICATOR = 81;
+	public static final int VALID_LOCAL_TIME_OFFSET_INDICATOR = 82;
+
+	public static final int LOCAL_TIME_OFFSET_SIGN = 84;
+    public static final int[] LOCAL_TIME_OFFSET = { 85,86,87,88,89,90,91,92,
+    	93,94,95 };
+    public static final int[] MONTH = { 96,97,98,99 };
+    public static final int[] DAY = { 100,101,102,103 };
+    public static final int[] YEAR = { 105,106,107,108,109,110,111,112,113,114,
+    	115,116,117 };
+    public static final int[] HOURS = { 120,121,122,123,124 };
+    public static final int[] MINUTES = { 125,126,127,128,129,130 };
+    public static final int[] SECONDS = { 131,132,133,134,135,136 };
+    
+    private SimpleDateFormat mTimeFormatter = 
+    		new SimpleDateFormat( "EEE, d MMM yyyy HH:mm:ss Z" );
+
+	public TimeAndDateAnnouncement( BitSetBuffer message, DataUnitID duid,
+								AliasList aliasList )
+    {
+	    super( message, duid, aliasList );
+    }
+
+    @Override
+    public String getEventType()
+    {
+        return Opcode.TIME_DATE_ANNOUNCEMENT.getDescription();
+    }
+    
+    public String getMessage()
+    {
+        StringBuilder sb = new StringBuilder();
+        
+        sb.append( getMessageStub() );
+
+        if( hasValidDate() )
+        {
+        	sb.append( " DATE-TIME:" );
+        }
+        
+        sb.append( mTimeFormatter.format( new Date( getDateTimestamp() ) ) );
+        
+        return sb.toString();
+    }
+    
+    public long getDateTimestamp()
+    {
+    	Calendar cal = new GregorianCalendar( getTimeZone() );
+
+    	if( hasValidDate() )
+    	{
+        	cal.set( Calendar.YEAR, getYear() );
+        	cal.set( Calendar.MONTH, getMonth() );
+        	cal.set( Calendar.DAY_OF_MONTH, getDay() );
+    	}
+    	
+    	if( hasValidTime() )
+    	{
+    		cal.set( Calendar.HOUR, getHour() );
+    		cal.set( Calendar.MINUTE, getMinute() );
+    		cal.set( Calendar.SECOND, getSecond() );
+    	}
+    	
+    	return cal.getTimeInMillis();
+    }
+    
+    public boolean hasValidDate()
+	{
+		return mMessage.get( VALID_DATE_INDICATOR );
+	}
+	
+	public boolean hasValidTime()
+	{
+		return mMessage.get( VALID_TIME_INDICATOR );
+	}
+
+	public TimeZone getTimeZone()
+	{
+		StringBuilder sb = new StringBuilder();
+		
+		sb.append( "GMT " );
+		
+		sb.append( mMessage.get( LOCAL_TIME_OFFSET_SIGN ) ? "-" : "+" );
+
+		int offsetMinutes = getLocalTimeOffset();
+		
+		sb.append( (int)( offsetMinutes / 60 )  );
+		
+		sb.append( " : " );
+		
+		sb.append( offsetMinutes % 60 );
+		
+		return TimeZone.getTimeZone( sb.toString() );
+	}
+	
+	public boolean hasValidLocalTimeOffset()
+	{
+		return mMessage.get( VALID_LOCAL_TIME_OFFSET_INDICATOR );
+	}
+
+	/**
+	 * Local Time Offset in minutes
+	 */
+	public int getLocalTimeOffset()
+	{
+		return mMessage.getInt( LOCAL_TIME_OFFSET );
+	}
+
+	public int getMonth()
+	{
+		return mMessage.getInt( MONTH );
+	}
+	
+	public int getDay()
+	{
+		return mMessage.getInt( DAY );
+	}
+	
+	public int getYear()
+	{
+		return mMessage.getInt( YEAR );
+	}
+	
+	public int getHour()
+	{
+		return mMessage.getInt( HOURS );
+	}
+	
+	public int getMinute()
+	{
+		return mMessage.getInt( MINUTES );
+	}
+	
+	public int getSecond()
+	{
+		return mMessage.getInt( SECONDS );
+	}
+}

src/decode/p25/message/tsbk/osp/data/SNDCPData.java

@@ -0,0 +1,24 @@
+package decode.p25.message.tsbk.osp.data;
+
+import alias.AliasList;
+import bits.BitSetBuffer;
+import decode.p25.message.tsbk.ServiceMessage;
+import decode.p25.reference.DataUnitID;
+
+public abstract class SNDCPData extends ServiceMessage
+{
+	public static final int[] NETWORK_SERVICE_ACCESS_POINT_ID = { 84,85,86,87 };
+	
+    public static final int[] TARGET_ADDRESS = { 96,97,98,99,100,101,102,103,
+        104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119 };
+    
+    public static final int[] SOURCE_ADDRESS = { 120,121,122,123,124,125,126,
+        127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143 };
+    
+    public SNDCPData( BitSetBuffer message, 
+                                   DataUnitID duid,
+                                   AliasList aliasList ) 
+    {
+    	super( message, duid, aliasList );
+    }
+}

src/decode/p25/message/tsbk/osp/data/SNDCPDataChannelAnnouncementExplicit.java

@@ -0,0 +1,148 @@
+package decode.p25.message.tsbk.osp.data;
+
+import alias.AliasList;
+import bits.BitSetBuffer;
+import decode.p25.message.tsbk.osp.control.IdentifierUpdate;
+import decode.p25.message.tsbk.osp.control.IdentifierUpdateReceiver;
+import decode.p25.reference.DataUnitID;
+
+public class SNDCPDataChannelAnnouncementExplicit extends SNDCPData 
+					implements IdentifierUpdateReceiver
+{
+	public static final int AUTONOMOUS_ACCESS_AVAILABLE_INDICATOR = 88;
+	public static final int REQUESTED_ACCESS_AVAILABLE_INDICATOR = 89;
+	
+	public static final int[] TRANSMIT_IDENTIFIER = { 96,97,98,99 };
+    public static final int[] TRANSMIT_CHANNEL = { 100,101,102,103,104,105,106,
+    	107,108,109,110,111 };
+	public static final int[] RECEIVE_IDENTIFIER = { 112,113,114,115 };
+    public static final int[] RECEIVE_CHANNEL = { 116,117,118,119,120,121,122,
+    	123,124,125,126,127 };
+    
+    public static final int[] DATA_ACCESS_CONTROL = { 128,129,130,131,132,133,
+    	134,135,136,137,138,139,140,141,142,143 };
+    
+    private IdentifierUpdate mIdentifierUpdateTransmit;
+    private IdentifierUpdate mIdentifierUpdateReceive;
+
+    public SNDCPDataChannelAnnouncementExplicit( BitSetBuffer message, 
+								  DataUnitID duid,
+								  AliasList aliasList )
+    {
+	    super( message, duid, aliasList );
+    }
+    
+    public String getMessage()
+    {
+        StringBuilder sb = new StringBuilder();
+        
+        sb.append( getMessageStub() );
+        
+        if( isEmergency() )
+        {
+            sb.append( " EMERGENCY" );
+        }
+        
+        if( isAutonomousAccessAvailable() )
+        {
+        	sb.append( " AUTONOMOUS ACCESS" );
+        }
+        
+        if( isRequestedAccessAvailable() )
+        {
+            sb.append( " DOWNLINK:" );
+            sb.append( getTransmitIdentifier() + "-" + getTransmitChannel() );
+            
+            sb.append( " " + getUplinkFrequency() );
+            
+            sb.append( " UPLINK:" );
+            sb.append( getReceiveIdentifier() + "-" + getReceiveChannel() );
+            
+            sb.append( " " + getDownlinkFrequency() );
+            
+            sb.append( " DATA ACCESS CONTROL:" );
+        }
+        else
+        {
+        	sb.append( " ACCESS DENIED TO DATA ACCESS CONTROL:" ); 
+        }
+        
+        sb.append( getDataAccessControl() );
+        
+        return sb.toString();
+    }
+    
+    public boolean isAutonomousAccessAvailable()
+    {
+    	return mMessage.get( AUTONOMOUS_ACCESS_AVAILABLE_INDICATOR );
+    }
+    
+    public boolean isRequestedAccessAvailable()
+    {
+    	return mMessage.get( REQUESTED_ACCESS_AVAILABLE_INDICATOR );
+    }
+    
+    public int getTransmitIdentifier()
+    {
+        return mMessage.getInt( TRANSMIT_IDENTIFIER );
+    }
+    
+    public int getTransmitChannel()
+    {
+        return mMessage.getInt( TRANSMIT_CHANNEL );
+    }
+    
+    public int getReceiveIdentifier()
+    {
+        return mMessage.getInt( RECEIVE_IDENTIFIER );
+    }
+    
+    public int getReceiveChannel()
+    {
+        return mMessage.getInt( RECEIVE_CHANNEL );
+    }
+    
+    public String getDataAccessControl()
+    {
+    	return mMessage.getHex( DATA_ACCESS_CONTROL, 4 );
+    }
+    
+	@Override
+    public void setIdentifierMessage( int identifier, IdentifierUpdate message )
+    {
+		if( identifier == getTransmitIdentifier() )
+		{
+			mIdentifierUpdateTransmit = message;
+		}
+		else if( identifier == getReceiveIdentifier() )
+		{
+			mIdentifierUpdateReceive = message;
+		}
+		else
+		{
+			throw new IllegalArgumentException( "unexpected channel band "
+					+ "identifier [" + identifier + "]" );
+		}
+    }
+
+	@Override
+    public int[] getIdentifiers()
+    {
+		int[] identifiers = new int[ 2 ];
+		
+		identifiers[ 0 ] = getTransmitIdentifier();
+		identifiers[ 1 ] = getReceiveIdentifier();
+
+	    return identifiers;
+    }
+
+    public long getDownlinkFrequency()
+    {
+    	return calculateDownlink( mIdentifierUpdateTransmit, getReceiveChannel() );
+    }
+    
+    public long getUplinkFrequency()
+    {
+    	return calculateUplink( mIdentifierUpdateReceive, getTransmitChannel() );
+    }
+}

src/decode/p25/message/tsbk/osp/data/SNDCPDataChannelGrant.java

@@ -0,0 +1,123 @@
+package decode.p25.message.tsbk.osp.data;
+
+import alias.AliasList;
+import bits.BitSetBuffer;
+import decode.p25.message.tsbk.osp.control.IdentifierUpdate;
+import decode.p25.message.tsbk.osp.control.IdentifierUpdateReceiver;
+import decode.p25.reference.DataUnitID;
+
+public class SNDCPDataChannelGrant extends SNDCPData implements IdentifierUpdateReceiver
+{
+	public static final int[] TRANSMIT_IDENTIFIER = { 88,89,90,91 };
+    public static final int[] TRANSMIT_CHANNEL = { 92,93,94,95,96,97,98,99,100,
+    	101,102,103 };
+	public static final int[] RECEIVE_IDENTIFIER = { 104,105,106,107 };
+    public static final int[] RECEIVE_CHANNEL = { 108,109,110,111,112,113,114,
+    	115,116,117,118,119 };
+    
+    public static final int[] TARGET_ADDRESS = { 120,121,122,123,124,125,126,
+        127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143 };
+    
+    private IdentifierUpdate mIdentifierUpdateTransmit;
+    private IdentifierUpdate mIdentifierUpdateReceive;
+
+    public SNDCPDataChannelGrant( BitSetBuffer message, 
+								  DataUnitID duid,
+								  AliasList aliasList )
+    {
+	    super( message, duid, aliasList );
+    }
+    
+    public String getMessage()
+    {
+        StringBuilder sb = new StringBuilder();
+        
+        sb.append( getMessageStub() );
+        
+        if( isEmergency() )
+        {
+            sb.append( " EMERGENCY" );
+        }
+        
+        sb.append( " UPLINK:" );
+        sb.append( getTransmitIdentifier() + "-" + getTransmitChannel() );
+        
+        sb.append( " " + getUplinkFrequency() );
+        
+        sb.append( " DOWNLINK:" );
+        sb.append( getReceiveIdentifier() + "-" + getReceiveChannel() );
+        
+        sb.append( " " + getDownlinkFrequency() );
+
+        sb.append( " TGT:" );
+        sb.append( getTargetAddress() );
+        
+        return sb.toString();
+    }
+    
+    public int getTransmitIdentifier()
+    {
+        return mMessage.getInt( TRANSMIT_IDENTIFIER );
+    }
+    
+    public int getTransmitChannel()
+    {
+        return mMessage.getInt( TRANSMIT_CHANNEL );
+    }
+    
+    public int getReceiveIdentifier()
+    {
+        return mMessage.getInt( RECEIVE_IDENTIFIER );
+    }
+    
+    public int getReceiveChannel()
+    {
+        return mMessage.getInt( RECEIVE_CHANNEL );
+    }
+    
+    public String getTargetAddress()
+    {
+        return mMessage.getHex( TARGET_ADDRESS, 6 );
+    }
+
+	@Override
+    public void setIdentifierMessage( int identifier, IdentifierUpdate message )
+    {
+		if( identifier == getTransmitIdentifier() )
+		{
+			mIdentifierUpdateTransmit = message;
+		}
+		else if( identifier == getReceiveIdentifier() )
+		{
+			mIdentifierUpdateReceive = message;
+		}
+		else
+		{
+			throw new IllegalArgumentException( "unexpected channel band "
+					+ "identifier [" + identifier + "]" );
+		}
+    }
+
+	@Override
+    public int[] getIdentifiers()
+    {
+		int[] identifiers = new int[ 2 ];
+		
+		identifiers[ 0 ] = getTransmitIdentifier();
+		identifiers[ 1 ] = getReceiveIdentifier();
+
+	    return identifiers;
+    }
+
+    public long getDownlinkFrequency()
+    {
+    	return calculateDownlink( mIdentifierUpdateReceive, getReceiveChannel() );
+    }
+    
+    public long getUplinkFrequency()
+    {
+    	return calculateUplink( mIdentifierUpdateTransmit, getTransmitChannel() );
+    }
+
+	
+}

src/decode/p25/message/tsbk/osp/data/SNDCPDataPageRequest.java

@@ -0,0 +1,51 @@
+package decode.p25.message.tsbk.osp.data;
+
+import alias.AliasList;
+import bits.BitSetBuffer;
+import decode.p25.reference.DataUnitID;
+
+public class SNDCPDataPageRequest extends SNDCPData
+{
+	public static final int[] DATA_ACCESS_CONTROL = { 104,105,106,107,108,109,
+		110,111,112,113,114,115,116,117,118,119 };
+	
+    public static final int[] TARGET_ADDRESS = { 120,121,122,123,124,125,126,
+        127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143 };
+    
+    public SNDCPDataPageRequest( BitSetBuffer message, 
+								  DataUnitID duid,
+								  AliasList aliasList )
+    {
+	    super( message, duid, aliasList );
+    }
+    
+    public String getMessage()
+    {
+        StringBuilder sb = new StringBuilder();
+        
+        sb.append( getMessageStub() );
+        
+        if( isEmergency() )
+        {
+            sb.append( " EMERGENCY" );
+        }
+
+        sb.append( " TGT:" );
+        sb.append( getTargetAddress() );
+        
+        sb.append( " DAC:" );
+        sb.append( getDataAccessControl() );
+        
+        return sb.toString();
+    }
+    
+    public String getDataAccessControl()
+    {
+    	return mMessage.getHex( DATA_ACCESS_CONTROL, 4 );
+    }
+    
+    public String getTargetAddress()
+    {
+        return mMessage.getHex( TARGET_ADDRESS, 6 );
+    }
+}