PSTN line gain
JeremyW:
Hi,
My original thread was getting a bit long and off topic so here's a new question:
New OBi110 working well - call quality is excellent, however I need to tweak the call volume on the PSTN line. All incoming calls are on the British Telecom PSTN line and the only comment is that the volume of my voice is a little quiet (to the caller). Which setting would be appropriate for tweaking that up a little and, while I'm at it, the caller volume on the PSTN line as well (but not as much).
Thanks.
ianobi:
In Line Port > Port Settings you will find these two parameters:
ChannelTxGain
Gain in dB (-15 to 15) to apply to the signal transmit from the OBi to the PSTN company
ChannelRxGain
Gain in dB (-15 to 15) to apply to the signal received by the OBi from the PSTN company
Adjust carefully - a change of 3dB upwards or downwards will double or halve the perceived volume.
There are two similar settings in the Phone Port to adjust the volume sent to and from the telephone plugged into your OBi110. If the volume to and from your SIP callers seems ok, then it is most likely that the adjustment is needed on the Line Port to only affect PSTN calls.
JeremyW:
Many thanks. I'll give that a go.
drgeoff:
Ensure you have the line impedance setting changed from the default US value of 600 ohms. If you have loaded the UK xml file that should have done it.
JeremyW:
Quote from: drgeoff on January 31, 2015, 03:00:51 pm
Ensure you have the line impedance setting changed from the default US value of 600 ohms. If you have loaded the UK xml file that should have done it.
Yep. That's OK. I have the UK config. Thanks.
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