If they could all patch to NTIRN it would solve problems too many systems with interop calling makes it confusing agreed ?
GMRS interop
- Thread starter kmartin
- Start date
Project25_MASTR
TX-COMU
There is a system to system native interface within P25 but it is not very commonly used in Texas that is called Inter Sub-System Interface (there is a similar inteface specifically for consoles called the Console Sub-System Interface) that allows for native patching and talkgroup translations. It even allows for automatic subscriber roaming between systems (typically it relies on additional subscriber programming including system talkgroup translation info so the radio knows what talkgroups are related on the adjacent system). The problem with the interface as it was written, it is a 1-to-1 interface meaning one connection to one system and cannot relay/piggy-back through systems. That becomes someone problematic in Texas where nothing scales well due to the 50+ P25 trunking systems currently active in the state. To make all of those systems "roamable" would require 2500+ interconnections. Just to cover the 9 "regional" systems as identified by the state would take some 64 interconnections as each system has to connect to each other system individually). Even that is at a scale larger than what has ever been attempted. So at the end of the day, interoperability between the systems is always going to be an issue. If you have never heard the term before, Texas very much consists of a System of Systems and not a true statewide system.
The SOP should be, meet on the largest common denominator to interop. So if that were NTRIN, then NTIRN should've been where everyone met up but again, that takes training that isn't always "common sense" to a lot of agencies.
The SOP should be, meet on the largest common denominator to interop. So if that were NTRIN, then NTIRN should've been where everyone met up but again, that takes training that isn't always "common sense" to a lot of agencies.
GMRS is used widely in Northeast Dallas and surrounding cities/counties. Also, dispatchers use it a lot to talk to each other. I've heard Garland, Mesquite (of course), but also Richardson, Rockwall, Plano, NTTA, even a couple of Counties. On the mobile side, I hear Dallas, Garland and Mesquite quite a bit.
PAWMCo, Frisco and McKinney (I never mapped it out, but Denton County might be linked to Frisco as well for Little Elm) have several talkgroups that are linked across systems, allowing the Fire Departments to have a common mutual aid talkgroup for responses along the shared borders, so it does happen in this region.
I wonder if Texas will ever do like Many other states have done and use a state wide system for texas ?
8/29 11:15 PM Terrell PD was trying to raise Dallas PD on both GMRS and NTIRN and never got a reply on either law call channel you could actually hear the urgency turned to frustration in their voice
Today I learned the NTIRN Interop calling is down , I had heard several agencies trying to contact ft worth on I/O call with no response , a couple of hours later on one of the DPD channels I heard an officer ask if the I/O calling channel was working again , the dispatcher replied that they would check to find out and that they were maintenance done , but never heard the dispatcher say anything else