Hi All, I have a query regarding timing issues on a back-to-back asterisk setup we have here in the UK. Let me explain.
We have a 2 port Digium TE220P card, one span is configured to connect to our ISDN30 provider (British Telecom), the other span connects to our internal PBX. Here's the zaptel.conf snip: span=1,1,0,ccs,hdb3,crc4 bchan=1-15 dchan=16 bchan=17-31 span=2,0,0,ccs,hdb3,crc4 bchan=32-46 dchan=47 bchan=48-62 We bridge the two legs of the call together in order to perform some magic (recording, etc.). Our problem is that we occasionally get call quality problems such as breaks in the call, one way audio, clicks and pops on the line, etc. I checked for information with regard to these quality issues and have found possible solutions ranging from echo training to timing issues. Now, my question is, do we have the timing sources configured correctly on our spans above? As you can see, we've set span 1 to make the equipment at the far end of the E1/T1 link the preferred source of the master clock and disabled span 2 so it's never a source of timing but is this correct? I've seen other configuration such as the following: span=1,1,0,ccs,hdb3,crc4 bchan=1-15 dchan=16 bchan=17-31 span=2,1,0,ccs,hdb3,crc4 bchan=32-46 dchan=47 bchan=48-62 Would adding span 2 as a timing source maybe fix our clicking issues? Kindest Regards, Jon Morgan Jon Morgan Direct Dial: Mobile: Motors.co.uk Ltd is registered in England and Wales with Company No. 5975777. VAT registration GB 243 5711 74 Registered address: Northcliffe House, 2 Derry Street, London W8 5TT. Motors.co.uk Ltd is a Daily Mail and General Trust plc company. This message and any attachments are intended for the named addressee only. It contains information which may be confidential, legally privileged or otherwise protected by law. If you are not the intended recipient, please telephone or email the sender and delete this message and any attachments from your system. If you are not the intended recipient you must not copy this message or attachments or disclose the contents to any other person. Emails are not secure and may contain viruses. Motors.co.uk reserves the right to monitor all e-mail communications. _______________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
