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problem with the voice volume between incoming and outgoing calls

Hi all.

I have a situation with volume calls.

1.- When the calls are originated in the PSTN to the IP Phones, the volume is ok in both sites.

2.- When the calls is originated in the IP Phones to the PSTN, the person in the PSTN listens very low.

I try to adjust the volume in the voice-port configuration, increasing the input and output db value, but not if I am doing it well or if I need adjust the configuration in other part.

The router 2801 have a CCME ver 4, this router is connected to PBX with a E1 and the PBX have the PSTN Digital trunks.

this is the voice router configuration:

voice-card 0

dsp services dspfarm


voice service voip

allow-connections h323 to h323

supplementary-service h450.12


controller E1 0/0/0

framing NO-CRC4

line-termination 75-ohm

ds0-group 0 timeslots 1-12 type e&m-immediate-start dtmf dnis

description to the PBX


voice-port 0/0/0:0


input gain 4

output attenuation 4

playout-delay nominal 200

playout-delay minimum low

bearer-cap Speech


Re: problem with the voice volume between incoming and outgoing

Try using a negative value in the output attenuation setting. My understanding is that negative values in the the output attenuation increases the volume out to the PSTN. Make small adjustments as you increase the chance for echo. Positive values decrease the volume.


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