Users may not create topics, posts, or private messages containing or relating to the following material (especially pertaining to Motorola copyrighted software, unless you want Motorola to come along and shut this site down):

  • Listing for sale or trade of, or links to sites offering for sale or trade of, or giving away, Radio
    Service Software (RSS) or Customer Programming Software (CPS)
  • Profanity, pornography, defamation, or slanderous remarks directed towards any individual or entity
  • Commercial advertising (except in the Batboard Vendors forum, as approved by the Admin/Mod Staff)
  • Any other items which may be deemed as offensive

If any topics, posts, or private messages containing or relating to the aforementioned material are brought to the attention of the Admin/Mod Staff, they will be deleted.

Additional FAQ items appear here in Forum Rules. Please review them for posting guidelines and further clarification.

Talk Permit Tone and IP-223

This forum has been created to foster the discussion on future and cutting edge technology. This discussion is not limited or restricted to Motorola. Examples of allowed discussion are open source hardware (GNU Radio for example) and software (Open source P25, Asterisk, ROIP, etc). Discussion is also permitted where older technology could be applied to areas where it had previously not been used (Example: Trunking on amateur radio).

Moderator: Queue Moderator

randymince
Posts: 62
Joined: Thu Jun 21, 2007 2:33 am
What radios do you own?: MOTO,HARRIS,TELEX,RAYTHEON,GD

Talk Permit Tone and IP-223

Postby randymince » Mon Aug 19, 2013 1:40 am

The talk permit tone can be heard before audio while being received by other subscriber units. This happens even with the technician handset directly connected to the IP-223. This is not an issue with our current users, but I just want to know why it is doing this, because for some instances, it could be an issue in the future. Again when a console user transmits the talk permit tone is heard before any other audio. All radios are Motorola XTL 5000 base stations connected via tone remote to the IP-223 in a 4-Wire configuration.

On a separate note, does anyone have any experience with Motorola trunking systems and Telex IP-223 integration in general? I have had a lot of experience with the Telex product family, but am new to managing a trunking system, so just looking for some help to make sure it's not something on the trunking system side that I might be missing. Some console users are experiencing busy tones, everything seems to be correct on the Motorola system side, I was wondering if any TX or RX delays have needed to be adjusted at the 223 level to discourage the inhibit tone. Originally I was thinking that maybe if a dispatch user attempts to transmit quickly that the go ahead tone would be coming back down the wire line and be seen as a carrier or audio traffic causing the radio to produce the inhibit tone. Any thoughts or suggestions? I can dive into what I have changed at the user configuration level, just wanted to throw out the symptoms first.
...And that's how radios work

User avatar
Bill_G
Posts: 3058
Joined: Thu Sep 17, 2009 5:00 am

Re: Talk Permit Tone and IP-223

Postby Bill_G » Mon Aug 19, 2013 5:09 am

It would probably be wise to add 100ms of delay to the tx and rx paths for every line just to pad the buffers.

randymince
Posts: 62
Joined: Thu Jun 21, 2007 2:33 am
What radios do you own?: MOTO,HARRIS,TELEX,RAYTHEON,GD

Re: Talk Permit Tone and IP-223

Postby randymince » Mon Aug 19, 2013 9:22 pm

For sure, that is something that was done pre trunking migration. Bill have you experienced hearing the talk permit tone like I described?
...And that's how radios work

User avatar
Bill_G
Posts: 3058
Joined: Thu Sep 17, 2009 5:00 am

Re: Talk Permit Tone and IP-223

Postby Bill_G » Tue Aug 20, 2013 5:25 am

Yep. On Kenwood LTR which means you need a talk permit for every transmission. You hit ptt, half second later talk permit tones are heard, dispatcher starts talking. The tones never go out over the air. I'd go back over the wiring and internal IP223 jumpering to make sure it is not cross-connected or one jumper left in 2W.


Return to “Experimental and Next Generation LMR”

Who is online

Users browsing this forum: No registered users and 1 guest