[cisco-voip] Noise on BRI circuits.

[Robin Clayton]

Thanks for all the replies,

It was indeed the  voice port compand setting for the codec.

I had tried to set this earlier from searching on the internet but had failed to get the command right, more effort resulted in success.

Cheers

Rob

=========================
Robin Clayton

Network Transition Manager
Richard Rose Federation
Richard Rose Central Academy
Victoria Place
Carlisle
Cumbria
CA1 1LY

Tel: 01228 822075
www: www.rrfa.org.uk


-----Original Message-----
From: Christian Kratzer [mailto:ck-lists at cksoft.de]
Sent: 19 April 2012 14:46
To: Robin Clayton
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Noise on BRI circuits.

Hi,

On Thu, 19 Apr 2012, Robin Clayton wrote:

> Dear All,
>
> After 8 months our installers 3 experts told us the reason they could not set up our remote sites SRST router was because the ISDN BRI lines were not active!
>
> With no experience of ISDN config, it took me 30 mins to get the router answering calls from the ISDN lines and another half hour to push them to the call manager.
>
>
> However, there is a massive amount of noise on the connection. Both when the router dial-tone is present and when the call is pushed to the phone on the call manager.
>
> I can't figure out why!

Willd guess.  Try configuring

voice-port 0/0/0
  compand-type a-law

on your voice-ports. If they default to u-law you will get noice and crackling in europe where we have a-law.

Greetings
Christian

>
> Any ideas???
>
> Thanks
>
> Rob
>
>
>
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--
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