I found a solution. The problem is that the gain increase should be set
on the receiver's channel and not on that of the caller. This way the
voice prompts, which are on the caller's channel, don't get distorted.
The solution uses a pre-dial handler. Here are the relevant parts from
extensions.ael:
context outgoing {
greenphone_pre_dial_handler => {
Set(VOLUME(RX)=5);
Return();
}
601 => { // green phone
Set(VOLUME(TX)=1);
Dial(SIP/sip-spa1,20,Tb(outgoing^greenphone_pre_dial_handler^1));
Hangup();
}
}
On 23/04/2020 16:42, Iain Mott wrote:
Hello,
I've been trying to resolve a volume issue. I have an analogue SIP
phone that has low gain on its microphone. This can be resolved by
putting the following in its extension config:
Set(VOLUME(TX)=4);
The problem is that the caller to this extension will be making
attended transfers and the change in channel volume distorts the voice
prompt "transfer" and the subsequent dial tone.
Is there a way that I can redefine "atxfer" in features.conf such that
the volume of the channel is set back to 1 before the transfer is
made? I would like to do the opposite after that, ie. return the
volume of the extension to 4 when the transfer is finalised with
"atxferthreeway".
If anyone can help with this or has other suggestions, please let me
know.
Thanks,
Iain
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