08-13-2008 01:32 AM - edited 03-17-2019 09:28 PM
Hi!
one of our customers in Germany has a VoIP network consisting of a CUCM 6.1.1.2000-3 cluster and 2 Voice Gateways (Cisco 2811, IOS c2800nm-ipvoicek9-mz.124-15.T6.bin).
As the title already indicates, PSTN users are complaining about low volume on calls with users on this VoIP network.
Cisco suggests the following solution (adjusting input gain and output ettenuation):
http://www.ciscotaccc.com/kaidara-advisor/voice/showcase?case=K17481859
Since my experience is limited in the VoIP field, my question is if this solution has any side-effects which one should be concerned about. If its relevant, we also have fax calls across these Voice Gateways. No other PBX is connected.
Here is some of the cofiguration that might be relevant:
!
interface Serial0/0/0:15
no ip address
encapsulation hdlc
isdn switch-type primary-net5
isdn timer T310 10000
isdn overlap-receiving T302 6000
isdn incoming-voice voice
isdn number called enbloc 1
isdn outgoing-voice info-transfer-capability 3.1kHz-audio
no cdp enable
!
!
controller E1 0/0/0
pri-group timeslots 1-31
!
!
voice service voip
no supplementary-service h225-notify cid-update
h323
h225 timeout t302 6
h225 signal overlap
no h225 alt-ep hunt user-busy
call start slow
!
!
voice-port 0/0/0:15
cptone DE
!
!
dial-peer voice 1 pots
tone ringback alert-no-PI
description --------- main dial-peer in+out
destination-pattern 0
progress_ind setup enable 3
progress_ind alert enable 8
incoming called-number .
direct-inward-dial
port 0/0/0:15
!
Would be grateful if anybody has any advice!
08-13-2008 05:09 AM
Can you post the output of "show controllers e1"?
Brandon
08-13-2008 08:34 AM
Hi,
thanks for the quick reply! The "show controllers e1" displays:
XXXXXXXXX#sh controllers E1
E1 0/0/0 is up.
Applique type is Channelized E1 - balanced
No alarms detected.
alarm-trigger is not set
Version info Firmware: 20071011, FPGA: 13, spm_count = 0
Framing is CRC4, Line Code is HDB3, Clock Source is Line.
CRC Threshold is 320. Reported from firmware is 320.
Data in current interval (403 seconds elapsed):
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
Total Data (last 24 hours)
0 Line Code Violations, 0 Path Code Violations,
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins,
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
XXXXXXXXX#
let me know if more info, or output of any other commands is needed.
Ingo
08-13-2008 09:12 AM
I thought you might have a problem with the E1 config that was causing the problem, but it looks good. Adjusting the ouput attenuation as described in the link in your original post should not present any other problems. Start with the value indicated in the link and adjust as needed.
Brandon
08-13-2008 09:34 AM
Thanks for taking a look at it! I will give it a try then! :)
Ingo
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