• To anyone looking to acquire commercial radio programming software:

    Please do not make requests for copies of radio programming software which is sold (or was sold) by the manufacturer for any monetary value. All requests will be deleted and a forum infraction issued. Making a request such as this is attempting to engage in software piracy and this forum cannot be involved or associated with this activity. The same goes for any private transaction via Private Message. Even if you attempt to engage in this activity in PM's we will still enforce the forum rules. Your PM's are not private and the administration has the right to read them if there's a hint to criminal activity.

    If you are having trouble legally obtaining software please state so. We do not want any hurt feelings when your vague post is mistaken for a free request. It is YOUR responsibility to properly word your request.

    To obtain Motorola software see the Sticky in the Motorola forum.

    The various other vendors often permit their dealers to sell the software online (i.e., Kenwood). Please use Google or some other search engine to find a dealer that sells the software. Typically each series or individual radio requires its own software package. Often the Kenwood software is less than $100 so don't be a cheapskate; just purchase it.

    For M/A Com/Harris/GE, etc: there are two software packages that program all current and past radios. One package is for conventional programming and the other for trunked programming. The trunked package is in upwards of $2,500. The conventional package is more reasonable though is still several hundred dollars. The benefit is you do not need multiple versions for each radio (unlike Motorola).

    This is a large and very visible forum. We cannot jeopardize the ability to provide the RadioReference services by allowing this activity to occur. Please respect this.

What is SMR?

Status
Not open for further replies.

thess416

Member
Joined
Jan 11, 2006
Messages
15
Location
Newport News, VA
I'm sorry if this has been asked before... but what exactly is "SMR"? I'm in central North Carolina and several counties have "Fayetteville SMR" as an operating TRS. The system list several sites but has a relatively low number of talk groups, furthermore... many of the TGID's are duplicated on another system. So I'm wondering if there is something I'm missing.

Also I'm wondering about P25. The main TRS's I listen to are Motorola type II, when someone talks my scanner flashed "LNK P25" Does this mean it's a P25 system or P25 compliant or what? I've noticed other systems are labeled P25. So whats the difference?

If anyone is wondering I'm using a BCD396T
 
Last edited:
D

DaveNF2G

Guest
SMR = Specialized Mobile Radio

This was the FCC's designation for land mobile trunking when these systems first became available.
 

immelmen

Member
Joined
Jun 13, 2007
Messages
377
do a google search for "APCO-25" and you will find all kinds of info. Moto type II TRS are not true P25 compliant TRS as they still use proprietary 3600 baud CC. APCO Project 25 TRS use 9600 baud control channels.

However, moto type II systems (esp. smartzone) do often use CAI (common air interface) for digital voice transmissions, which is the APCO name for IMBE (improved multi band excitation). IMBE is the P25 standard for digital voice.

Fayetteville looks like type 2 smartnet- (there is no digital p25 voice, analog only). Looks like the nearest digital voice to you would be the smartzone system at brag. or the VIPER system. additionally, there are no pure P25 compliant 9600 TRS in your county, according to the database.

that is a VERY basic quick and dirty to help point you in the right direction for some research.
 
Last edited:
D

DaveNF2G

Guest
SMR has little to do with P25, except that the Project 25 standard is a new way to build public safety "SMR" systems.
 

thess416

Member
Joined
Jan 11, 2006
Messages
15
Location
Newport News, VA
Thank you all so much for the info. The VIPER System is the system I was referring to when I was talking about my scanner flashing the "LNK P25". The county next to mine is EDACS Pro Voice, and a few counties over has just created a new P25 system... but I have no info on the talk groups yet. So basically the VIPER system is not a true P25 system because because it used the proprietary 3600 baud control channels? So I assume that the TGID's using the CAI are P25 compliant, thus the P25 link on my scanner.

Thanks all for the information
 

immelmen

Member
Joined
Jun 13, 2007
Messages
377
So basically the VIPER system is not a true P25 system because because it used the proprietary 3600 baud control channels? So I assume that the TGID's using the CAI are P25 compliant, thus the P25 link on my scanner.
Correct, VIPER is not, as a TRS, P25 compliant. It just so happens the mode for voice transmissions used on the system, IMBE, is the Project-25 standard (CAI) for digital voice. The talkgroups using CAI are still not really P25 compliant however, because they still trunk with the older 3600 baud system.
 
Last edited:
D

DaveNF2G

Guest
The talkgroups using CAI are still not really P25 compliant however, because they still trunk with the older 3600 baud system.
Yes, they are compliant with the part of the P25 standard describing how digital audio is to be generated. The fact that a trunked system is not using a P25 standard 9600 bps control channel does not render the digital audio on that system noncompliant.
 

immelmen

Member
Joined
Jun 13, 2007
Messages
377
Yes, they are compliant with the part of the P25 standard describing how digital audio is to be generated. The fact that a trunked system is not using a P25 standard 9600 bps control channel does not render the digital audio on that system noncompliant.
correct, I didn't think I suggested otherwise. As I stated that IMBE audio, no matter the system, was the P25 standard, (ie. compliant). My understanding of the question (thess416 correct me if I am wrong) was that it asked, black or white, if the Talkgroup was P25 compliant. No talkgroup on a 3600 system is P25 compliant even if the voice mode is.

thess416, I am not familiar with that scanner, but I would guess the P25 message on the screen is because it is receiving P25 standard voice on that (Motorola)talkgroup. Possibly someone else using this scanner could confirm.
 
Last edited:

thess416

Member
Joined
Jan 11, 2006
Messages
15
Location
Newport News, VA
immelmen, Yes... you were correct. I assumed that the specific talkgroup was P25 compliant because of how it was digitally generated. On the VIPER system, there are a mix of analog and digital.

The system here is kind of new and I still have a lot to learn, but it was my impression that part of the appeal of the system was the P25 standard.

Thank you all for the information
 

Cowthief

Member
Joined
Oct 10, 2003
Messages
102
Location
Texas
P25 on conventional.

Hello.

Correct, P25, but not quite.
However, if you take a Motorola Astro Sabre talkie that is set up for 400 MHz trunking and configure it for conventional, it will work just fine as a P25 compliant radio.
Remember that the government models may come in some wild splits, so be careful what you buy.
But, depending on what you buy, you may be able to get a non-trunking fully P25 compliant talkie for cheap.
And, yes, NextHell has pretty much ended the smaller radio shop, that and the cellular carriers.
But, not only can you monitor this, for the correct user, this type of radio can be just what you are looking for.
 
Status
Not open for further replies.
Top