Control Channel Question (800 Mot)

[ScanDaBands]

Have a system here in Horry County specifically this one (Waccamaw Wireless)

Motorola Type IIi Hybrid

http://www.radioreference.com/apps/db/?sid=2754

Just as a note : Our database is NOT correct for CC Channels


One day the contol channel is 0859.7875

Next day it is 0853.6375 (flips back and forth between these two)

I have this system programmed into a BCT15 as a multi-net site , picks up the TGID's as it should but I'm wondering is this the best way to monitor this particular system ??

 

[WayneH]

I have this system programmed into a BCT15 as a multi-net site , picks up the TGID's as it should but I'm wondering is this the best way to monitor this particular system ??

No, it's a standard non-networked system so it should not be programmed as a "multi-net" system.

It's standard for older systems to rotate the control channel. It sounds more like the database just needs to be updated for the correct CC info.

 

[ScanDaBands]

No, it's a standard non-networked system so it should not be programmed as a "multi-net" system.

It's standard for older systems to rotate the control channel. It sounds more like the database just needs to be updated for the correct CC info.

Thanks Wayne.......so you think this is a Type 1 system ? Or I just should have them in seperate sytems with the Type II ?

 

[WayneH]

I'm not sure why the system is classified as IIi when there's absolutely no data on it. If that is true then you'll have to try it out in Type II mode and determine which blocks are Type I and/or II.

Maybe post a question about it in your regional forum?

 

[ScanDaBands]

Maybe post a question about it in your regional forum?

Great Idea , thanks again Wayne 100%

 

[talviar]

Many systems ran/run in Type IIi Hybrid mode to allow the older Type I Equipment on. There may have been some users on a former privacy plus type I system that were migrated on to this particular system in the past. Placing the site controller for the trunked system in IIi hybrid mode will allow the controller to support both Type I radios and Type II radios.
(Programming of the subscriber units requires some careful planning if a Type II radio MTX8000/MTS2000 or otherwise required the talk group in it to talk to the older Type I radios.)
If a fleet map is required for the system and programmed into the scanner you may get talk group ID's like 600-1 on the display (If you don't have the fleet map some odd ball 5 digits TG ID's come up on most of the scanners for the Type I talkgroups.

Might have confused you more but can't really describe it any better.

 

[ScanDaBands]

Many systems ran/run in Type IIi Hybrid mode to allow the older Type I Equipment on. There may have been some users on a former privacy plus type I system that were migrated on to this particular system in the past. Placing the site controller for the trunked system in IIi hybrid mode will allow the controller to support both Type I radios and Type II radios.
(Programming of the subscriber units requires some careful planning if a Type II radio MTX8000/MTS2000 or otherwise required the talk group in it to talk to the older Type I radios.)
If a fleet map is required for the system and programmed into the scanner you may get talk group ID's like 600-1 on the display (If you don't have the fleet map some odd ball 5 digits TG ID's come up on most of the scanners for the Type I talkgroups.

Might have confused you more but can't really describe it any better.

That does help and appreciated 100%

 

[talviar]

Glad the info helped.

Reason for doing this in many cases was to allow a "cheaper" path of radios onto the systems or in some cases allowed existing radios on to the new system. Many years ago in the case (1995 for online of radio system) of my county (I work on the admin staff here at Fayette County 911) "Fayette County, PA" many municipal government entities were subscribers to the local Motorola Privacy Plus Trunked Radio System and had numerous Maxtrac Type I and MTX800/810 Type I Radios. When we put our public safety trunked system in operation (simultaneous with turning on a 911 center) we opted to go IIi hybrid and provide a migration path so existing users didn't have to rush out and buy equipment to work on the new system. Interesting tidbit. . . . when programming an MCS2000, Spectra, MTX8000, MTX8250, MTS2000 or GTX radio the format for entering a Type I talk group is to enter it as a type IIi talkgroup in the radio programming. That allows the Type II radio to talk to a Type I radio as long as the Trunking controller is operation a IIi hybrid format. in esscence "interop" of dis-similar radios.

(Just to help the rational with why the "backend" decisions are made the way they are in some cases.) Don't know the particulars for the system in question but suspect that it might be a similar case to what I described.

Tony