CUE in UK getting bad recordings

Unanswered Question
Feb 1st, 2007

Current Version: 2.2.2 integrated with CCM 4.1.3.

I have a two CUE installations. One CUE is in the US and the second is in the UK. Everything works fine with the US CUE voicemail system but the CUE installed in the UK is not able to record messages with good quality from the outside world. Calls forwarded to voicemail made from an internal phone or from a US gateway work fine. Any call coming in from the UK gateway doesn't record with good quality. The recording is hard to hear with a lot of static sound overtop of the call. Keep in mind that the UK Gateway is a ISDN BRI Circuit that has to be setup as a g711alaw codec. In the US we use g711ulaw codec. I think there is an issue with a codec mismatch but I can't seem to resolve it. The UK CUE auto attendant prompts sound fine when calling in through the UK Gateway.

I have this problem too.
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sopayne Thu, 02/01/2007 - 16:56

Hi,

I've heard of other instances where the g711a law on voip dial peer was causing the issue-- but this was for U.S. customers and changing the codec to G711u law corrected their problem with voice quality on CUE.

Could you confirm this config parameter?

Good luck.

snagelipphone Thu, 02/01/2007 - 17:03

Cisco TAC is currently reviewing information I send them. If I try to change the ISDN BRI Circuit to g711ulaw then phone calls have the same static issue. When it is set to a-law the phone calls are clear. The call legs to the CUE during the recording process are showing g711alaw codecs which seem to be unsupported with CUE 2.2.2 that I'm using currently. Transcoding doesn't seem to come in to play even though I have some configured on the same router.

snagelipphone Thu, 02/01/2007 - 17:54

The solution to my problem was changing my router from:

voice class codec 1

codec preference 1 g711alaw

codec preference 2 g729r

to

voice class codec 1

codec preference 1 g711alaw

codec preference 2 g711ulaw

codec preference 3 g729r8

This allows the call to be changed from g711alaw to g711ulaw on the fly without using any DSP transcoding resources from what I can tell.

The following is for anyone trying to solve a similar g711alaw to g711ulaw issue:

Entries needed for UK a-law ISDN BRI Circuits:

interface BRI0/0/0

no ip address

isdn switch-type basic-net3

isdn point-to-point-setup

isdn incoming-voice voice

isdn sending-complete

isdn static-tei 0

!

voice-port 0/0/0

no vad

compand-type a-law

no comfort-noise

cptone GB

timeouts interdigit 2

bearer-cap Speech

Dial Peers for voice traffic to CCM and CUE Voicemail and Auto Attendant:

dial-peer voice 500 voip

description CCM Traffic

destination-pattern X...

progress_ind setup enable 3

modem passthrough nse codec g711alaw

voice-class codec 1

voice-class h323 1

session target ipv4:10.1.10.10

dtmf-relay h245-alphanumeric

fax-relay ecm disable

fax rate disable

no vad

!

dial-peer voice 300 voip

description CUE-VM

destination-pattern 3300

session protocol sipv2

session target ipv4:10.2.10.3

dtmf-relay h245-alphanumeric

codec g711ulaw

no vad

!

dial-peer voice 301 voip

description CUE-AA

destination-pattern 3310

session protocol sipv2

session target ipv4:10.2.10.3

dtmf-relay h245-alphanumeric

codec g711ulaw

no vad

!

Hope this can help someone else in the future.

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