MPT1327, FFSK Muting

[ristomemo]

I am a newbie in MPT1327, and Motorolas Gp-series.
Is it possible to change any parameters in the CPC to mute the annoying FFSK sound in the end of every call. I have read about the MDC systems, and the DOS (data operated squelch) function. So it is would be strange if the MPT radios don’t have the same function. I am now using the ENVN4006M CPS for the MPT radios, and I can’t find any settings about DOS (or something similar). And anything in the help text either.

[rudy77]

Hi,

I'm writing from France (Paris), my job is to operate a trunking system for the Paris buses (RATP). On this network, there is about 400 GP680 and 300 GM1280. The sound that you heard at the end of the communication is the CLEAR message send by the radio controller. Normally you don't heard this sound because when the GP receive the first CLEAR, generally trunking system sent about 10 CLEAR messages, it release the trafic channel and return to the control channel so you normally heard anything ! In the CPS there is nothing about this. Perhaps there is a problem in your configuration about the synchronisation byte sending on trafic channel, the SYNT message. Is your GP release the communication and return to the control channel when it receive the FFSK ?

Sorry for my poor english.....

[ristomemo]

Hi

Thanks for your answer. The radio is returning to the control channel as it should. But you can hear the FFSK message for about 0,5 sec. If I understand you right you cant here anything like this, or? We use the radio together with headsets in a noise environment, so If you have a higer volume the FFSK sound can be annoying. What type of controller are you using? We use Zetron 827