P25 Dispatch

InterTalk is your advanced P25 dispatch radio console solution.
Project 25 (P25) is the standard for digital wireless communications products. Governed by the Telecommunications Industry Association (TIA), and developed with input from public safety officials at the local, state, and federal levels, P25 is administered by the TIA’s Mobile and Personal Private Radio Standards Committee, known as TR-8. P25 technology has many benefits to its end users, including interoperability, integrated voice and data, easy migration, competitive procurement opportunities, and spectral efficiency.
The benefit to you? InterTalk is a key supporter of open-standards for public safety radio networks within North America. InterTalk was the first console system manufacturer to support the Console Sub-System Interface (CSSI) for P25, allowing our console systems and products to work with any compliant P25 radio network system. The CSSI is built upon the Inter Sub-System Interface (ISSI), which means that InterTalk’s console system can support simultaneous multiply-connected P25 systems. InterTalk consoles have successfully integrated with various third party P25 infrastructure providers, including Harris, Cassidian, Motorola, and Tait. Whatever your system, InterTalk can and will support it.
InterTalk is a proud member of both the Project 25 Technology Interest Group and the Telecommunications Industry Association.
Supported P25 Interfaces
- Trunked Inter-RF Subsystem Interface (ISSI)
- Trunked Console Subsystem Interface (CSSI)
- Conventional Inter-RF Subsystem Interface (ISSI)
- Analog Fixed Station Interface (AFSI)
- Digital Fixed Station Interface (DFSI)
Supported P25 Voice, Console, and Supplementary Features
FEATURE | P25 CONVENTIONAL | P25 TRUNKING |
---|---|---|
Unaddressed Voice Call | ![]() | N/A |
Voice Group Call | ![]() | ![]() |
Announcement Group Call | N/A | ![]() |
Broadcast Voice Call | N/A | ![]() |
System Voice Call | N/A | ![]() |
Individual (Unit-to-Unit) Call | ![]() | ![]() |
Emergency Group Call | ![]() | ![]() |
Emergency Unit Call | ![]() | ![]() |
Call Prioritization | ![]() | ![]() |
Call Pre-emption | ![]() | ![]() |
Call Interrupt | ![]() | ![]() |
Emergency Alarm | ![]() | ![]() |
Talking Party Identification | ![]() | ![]() |
Discreet Listening | ![]() | ![]() |
Radio Unit Monitoring | ![]() | ![]() |
Radio Inhibit/Unhibit | ![]() | ![]() |
Radio Check | ![]() | ![]() |
Status Request | ![]() | ![]() |
Status Update | ![]() | ![]() |
Call Alert | ![]() | ![]() |
Short Messaging | ![]() | ![]() |
Radio Detach | N/A | ![]() |
AES / DES Encryption | ![]() | ![]() |
Console Priority | ![]() | ![]() |
Registration | ![]() | ![]() |
Cross-Patching | ![]() | ![]() |
Supported TIA Standards
STANDARD | DATE | DESCRIPTION |
---|---|---|
TSB-102.BACC-B | Nov. 2011 | ISSI Overview |
TIA-102.BACA-B | Nov. 2012 | ISSI Messages and Procedures for Voice and Mobility Management Services |
TIA-102.BACD-B | Nov. 2011 | ISSI Messages and Procedures for Supplementary Data Services |
TIA-102.BACE | Jun. 2008 | ISSI Messages and Procedures for Conventional Operation |
TIA-102.BAHA | Jun. 2006 | FSI Messages and Procedures |
TIA/EIA-102.AAAA-A | Feb. 2001 | DES Encryption Protocol |
TIA/EIA-102.AAAD.A | Aug. 2009 | Block Encryption Protocol |
TIA-102.BABA | May 1998 | Vocoder Description |
TIA-102.BABA-1 | Jul. 2009 | Half-Rate Vocoder Annex |
Tested Against the Following Standards
STANDARD | DATE | DESCRIPTION |
---|---|---|
TSB-102.CACC | Jan. 2009 | ISSI Conformance Test Procedure |
TIA-102.CACC-1 | Aug. 2011 | ISSI Conformance Test Procedure - Addendum 1 - Supplementary Data |
TIA-102.CBBK-A | Mar. 2010 | Recommended Compliance Assessment Tests - Trunking ISSI |
TIA-102.CACD-A | Feb. 2010 | ISSI Interoperability Test Procedures for Trunked Systems Involving the ISSI |
TIA-102.CACB | Apr. 2007 | ISSI Performance Recommendations for Voice Services |
TIA-102.CACB-1 | Dec. 2008 | ISSI Performance Recommendations for Voice Services - Addendum 1 - Trunked Console ISSI |
TIA-102.CACA | Apr. 2007 | ISSI Measurement Methods of Voice Services |
TIA-102.CACA-1 | Dec. 2008 | ISSI Measurement Methods of Voice Services - Addendum 1 - Trunked Console ISSI |
CAB Document | Mar. 2010 | P25-CAB-ISSI_TEST_REQ: ISSI Testing Requirements |
NIST Standards for Crypto Module
STANDARD | DATE | DESCRIPTION |
---|---|---|
FIPS PUB 140-2 | Jan. 1994 | Security Requirements for Cryptographic Modules |
FIPS PUB 197 | Nov. 2001 | Advanced Encryption Standard (AES) |
FIPS PUB 46-3 | Oct. 1999 | Data Encryption Standard (DES) |
DOWNLOAD: Specsheet – P25 System Features [PDF – 0.9 MB]
Cut through the bureaucracy of updating or replacing your dispatch radio system. There are more options than you think. Contact InterTalk today to learn how we can tie into your dispatch equipment. It’s time for a seamless upgrade.

Contact
+1 833 55-ITALK (48255)
Headquarters 371 Cutler Avenue
Dartmouth, NS B3B 0J5
Canada
California, USA 1014 North Market Boulevard, Suite 60
Sacramento, California 95834
USA