[arm-allstar] full duplex RF link

[Patrick Perdue]

Greetings:


A local ham has a repeater connected to Allstarlink via an RF link where 
internet isn't available at the site, using HamVoIP at a location with 
internet. He wants this to be a full duplex link.

His repeater has a dedicated receiver on one port of the controller. The 
output of the repeater is gated. So, right now, the link radio is 
receiving on the repeater's main output frequency and transmitting on 
the input of the auxiliary receiver. This is configured such that all 
audio passes across the RC-850 repeater controller at the same time.

If he were to add a second radio, dedicating the existing one to RX, and 
the new one for TX, how would one configure HamVoIP such that a loop 
doesn't happen?

If duplex=3, then whatever is received by the node won't be 
re-transmitted, but does that still key the TX radio? I think it does, 
but I'm not entirely sure about that.

If duplex=0 or 1 with linktolink enabled, that's still going to repeat 
the audio, I think, just as duplex=2 would.

So, in this situation, given that there is only one transmitter but two 
receivers on the controller, how do you stop the TX radio from 
transmitting when the RX radio hears something, and still make it a full 
duplex link happen?

Or, do you?


73

N2DYI