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Choppy Sound

Discussion in '3CX Phone System - General' started by darryla, Oct 12, 2007.

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  1. darryla

    Oct 11, 2007
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    I'm setting up a new system and am having some problems with choppy sound. Here's a test case.

    I have a VoiP lin setup with InPhonex in 3CX.

    I have a softphone on a laptop.

    My 3CX server is setup at a data center.

    I'm sitting in my office with my laptop far away from my data center.

    The softphone registers. Then, I dial my landline. Then, I pick up the land line and then put the call on hold from my softphone. The music plays. But it's choppy. Very, very, very, choppy.

    Here's the call log:
    07:52:42.636 StratLink::eek:nHangUp [CM104001] Call(80): Ln:10000@InPhonex hung up call; cause: BYE; from IP:
    07:52:35.876 MediaServerReporting::RTPReceiver [MS005001] Call(80) Ext.201: payload #126 doesn't correspond initial SDP datalen=4
    07:52:25.351 MediaServerReporting::RTPSender [MS004000] Call(80) Ext.201: (ACTIVE): Can't send RTP stream to destination unreachable
    07:52:24.049 CallLegImpl::eek:nConnected [CM103001] Call(80): Created audio channel for Ln:10000@InPhonex ( with Media Server (
    07:52:23.999 StratInOut::eek:nConnected [CM104005] Call(80): Setup completed for call from Ext.201 to Ln:10000@InPhonex
    07:52:23.989 CallLegImpl::eek:nConnected [CM103001] Call(80): Created audio channel for Ext.201 ( with Media Server (
    07:52:17.880 CallConf::eek:nProvisional [CM103003] Call(80): Ln:10000@InPhonex is ringing
    07:52:15.958 CallConf::eek:nIncoming [CM103002] Call(80): Incoming call from 201 (Ext.201) to sip:xxxxxxxxxx@xxx.xxx.xxx.xxx

    Jul 23, 2007
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    1) Could be network jitter, in which case there is not much you can do since your ISP is simply bad at sustaining packets. You could try applying QoS through your router(s) if it supports such a thing.

    2) Try using the softphone on a different computer, or change the softphone.

    Many laptops have poor sound processing capability, and i have seen countless ocassions where softphones have bad sound, yet you move to a real PC and the same soft brand phone works.
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