Hi.
I have been utilizing Unitrunker 2 for decoding the APCO P25 messages sent from the Saskatchewan PPSTN. I like it!
Unitrunker 2 shows the OSP opcode 0x98 as an unknown message.
When the PPSTN was in the design phase a request was made to the supplier of the equipment to include a function for the paging of the District Operations Command (DOC) in Regina.
The DOC pager alert tone.
The system supplier agreed and accomplished this by utilizing one of the radio’s status message keys to page the DOC.
The ISP opcode 0x98 Mfg 00 status 01 message sent by an RID to the FNE DOC:
98 00 01 00 FF FF FC 21 C1 98 CA 88 Op 98 Mfg 00 unknown single ISP.
98 00 01 00 FF FF FC 21 C1 08 49 31 Op 98 Mfg 00 unknown single ISP.
98 00 01 00 FF FF FC 21 C2 E3 50 27 Op 98 Mfg 00 unknown single ISP.
These ISP messages were edited to provide clarity.
How the event log from Pro96com show the ISP opcode 0x98 message:
98 00 01 00 FF FF FC 21 C1 03 F8 5A, Unit Status Update - Src RID: 2212099 Dst RID: 16777212 Status: 1
98 00 01 00 FF FF FC 21 BC F7 29 C4, Unit Status Update - Src RID: 2211063 Dst RID: 16777212 Status: 1
98 00 01 00 FF FF FC 21 BF 40 AB AB, Unit Status Update - Src RID: 2211648 Dst RID: 16777212 Status: 1
The ISP message is sent to: FF FF FF FC = 16777212 = used for messages addressed to or from the FNE radio control/dispatch operator function.
The OSP response message is from: FF FF FF FD = 16777213 = used for messages addressed to or from the FNE radio control/dispatch operator function.
The sender is: 21 C1 0A = RID 2212106 RCMP unit A275 is a marked 2023 Chevy Silverado.
The responder is: 21 DB FE = RID 2219006 is RCMP (DOC) District Operational Command (Dispatcher).
The ISP message sent from A275 to the FNE/DOC at:
16:42:21.645 047 7 -98 00 01 00 FF FF FC 21 C1 0A 69 73 Op 98 Mfg 00 unknown single ISP.
The following are the control channel OSP messages seen when A275 paged/called the DOC in Regina. Unnecessary CC messages were deleted for clarity.
16:42:21.651 047 7 -A0 00 98 00 FF FF FD 21 C1 0A 61 2B Acknowledge Response of Status Update Request for I 21C10A to I FFFFFD
16:42:21.685 047 7 -98 00 01 00 FF FF FC 21 C1 0A 69 73 Op 98 Mfg 00 unknown single OSP
16:42:21.718 047 7 -A0 00 98 00 FF FF FC 21 C1 0A 17 9F Acknowledge Response of Status Update Request for I 21C10A to I FFFFFC
16:42:21.752 047 7 -A0 00 98 00 FF FF FC 21 C1 0A 17 9F Acknowledge Response of Status Update Request for I 21C10A to I FFFFFC
16:42:29.464 047 C 37 FD 00 21 DB FE 81 00 44 00 2F 3F Group Voice Grant Explicit 21DBFE -> G 0012 TX 0-0DB(139.09500) RX 0-2CD(141.58500) Enc (4 priority, packet protected)
16:42:29.464 047 C -00 00 00 DB 02 CD 00 12 86 06 8B A4
16:42:29.564 047 C 37 FD 00 21 DB FE 81 00 44 00 2F 3F Group Voice Grant Explicit 21DBFE -> G 0012 TX 0-0DB(139.09500) RX 0-2CD(141.58500) Enc (4 priority, packet protected)
16:42:29.564 047 C -00 00 00 DB 02 CD 00 12 86 06 8B A4
16:42:29.863 047 C 37 FD 00 21 DB FE 81 00 44 00 2F 3F Group Voice Grant Explicit 21DBFE -> G 0012 TX 0-05D(138.46500) RX 0-37B(142.45500) Enc (4 priority, packet protected)
16:42:29.863 047 C -00 00 00 5D 03 7B 00 12 2B 0B AB 34
16:42:29.998 047 C 37 FD 00 21 DB FE 81 00 44 00 2F 3F Group Voice Grant Explicit 21DBFE -> G 0012 TX 0-05D(138.46500) RX 0-37B(142.45500) Enc (4 priority, packet protected)
16:42:29.998 047 C -00 00 00 5D 03 7B 00 12 2B 0B AB 34
16:42:30.032 047 7 -83 00 44 00 00 5D 03 7B 00 12 E6 A7 Group Voice Grant Update Explicit G 0012 TX 0-05D(138.46500) RX 0-37B(142.45500), (4 priority, packet protected)
16:42:30.099 047 7 -83 00 44 00 00 5D 03 7B 00 12 E6 A7 Group Voice Grant Update Explicit G 0012 TX 0-05D(138.46500) RX 0-37B(142.45500), (4 priority, packet protected)
16:42:30.198 047 7 -83 00 44 00 00 5D 03 7B 00 12 E6 A7 Group Voice Grant Update Explicit G 0012 TX 0-05D(138.46500) RX 0-37B(142.45500), (4 priority, packet protected)
16:42:30.297 047 7 -83 00 44 00 00 5D 03 7B 00 12 E6 A7 Group Voice Grant Update Explicit G 0012 TX 0-05D(138.46500) RX 0-37B(142.45500), (4 priority, packet protected)
16:42:30.364 047 7 -83 00 44 00 00 5D 03 7B 00 12 E6 A7 Group Voice Grant Update Explicit G 0012 TX 0-05D(138.46500) RX 0-37B(142.45500), (4 priority, packet protected)
16:42:30.433 047 7 -83 00 44 00 00 5D 03 7B 00 12 E6 A7 Group Voice Grant Update Explicit G 0012 TX 0-05D(138.46500) RX 0-37B(142.45500), (4 priority, packet protected)
16:42:30.530 047 7 -83 00 44 00 00 5D 03 7B 00 12 E6 A7 Group Voice Grant Update Explicit G 0012 TX 0-05D(138.46500) RX 0-37B(142.45500), (4 priority, packet protected)
16:42:30.631 047 7 -83 00 44 00 00 5D 03 7B 00 12 E6 A7 Group Voice Grant Update Explicit G 0012 TX 0-05D(138.46500) RX 0-37B(142.45500), (4 priority, packet protected)
16:42:30.700 047 7 -83 00 44 00 00 5D 03 7B 00 12 E6 A7 Group Voice Grant Update Explicit G 0012 TX 0-05D(138.46500) RX 0-37B(142.45500), (4 priority, packet protected)
16:42:30.800 047 7 -83 00 44 00 00 5D 03 7B 00 12 E6 A7 Group Voice Grant Update Explicit G 0012 TX 0-05D(138.46500) RX 0-37B(142.45500), (4 priority, packet protected)
16:42:30.899 047 7 -83 00 44 00 00 5D 03 7B 00 12 E6 A7 Group Voice Grant Update Explicit G 0012 TX 0-05D(138.46500) RX 0-37B(142.45500), (4 priority, packet protected)
16:42:30.966 047 7 -83 00 44 00 00 5D 03 7B 00 12 E6 A7 Group Voice Grant Update Explicit G 0012 TX 0-05D(138.46500) RX 0-37B(142.45500), (4 priority, packet protected)
We can see that the network has responded with the message beginning with opcode 0xA0 = Acknowledge Response of Status Update Request.
So, the opcode 0x98 message can only be a Unit Status Update: Status: 01.
When this message is sent the DOC dispatcher for the zone/talk-group hears the alert tone and can see that A275 would like to speak to that dispatcher.
See the screen shot for the 4:42 pm A275 page/call to DOC.
I have also provided a Free Bonus zip file for those who have taken the time to read this post. Enjoy.
Cheers!