Call delay

Discussion in '3CX Phone System - General' started by juanjo, Jul 24, 2007.

  1. juanjo

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    Hi:

    Reading this forum i'm affraid that delaying in calls is a common problem. I have 3CX (latest version) running on Windows 2003 Storage Server with two Xeon processors and 2 Gb RAM. I have in mind that calls delaying does not owe to the computer.

    When we call to external numbers (and internal betwen extensions is the same but 0.5-1sec) good sound but there is about two seconds of delay in the conversation, yes, the time between the sound arrives from one to the other party in both directions. This problem does not happens calling directly (without 3CX). It's sounds like can be while coding/decoding the sound.

    Anybody can help me ?.
     
  2. Anonymous

    Anonymous Guest

    Yep,

    This does occur, personally i think it is related to the user of the media server.

    I found a way around this :lol: an addtional disk..... What i found that if you have one disk for you os and one for 3cx, the problem does not occur.

    Making sure you use all the correct codecs, on all the points in your network can help things allong aswell. But funny as it sounds an additional disk did the trick for me.
     
  3. juanjo

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    About new disk

    Thanks for your reply.

    Amazing about new disk. But i don't understand. Really true?. As you know, i have dual xeon and W2003 SS, i have five disk working over Raid 5. How it's possible ??

    It's possible install 3CX in other partition in this Raid5 and preforms like aditional disk ??
     
  4. Ralph

    Ralph Member

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    I am having a similar problem but only on incomming sound

    I am having a delay of 1 second on incomming sound only. Outgoing sound on the same call is fine.

    Logs from Server Status for the call are as follows:

    Any ideas as to why outgoing sound is ok and incomming is delayed 1 second on the same call??

    Thank you
     
  5. Ralph

    Ralph Member

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    Ok I may have figured this out

    I looked over the jitter buffer settings on the Polycom Soundpoint IP 501 phones and they were set at the following:

    Minimum: 40
    Maximum: 160
    Shrink: 500

    I dropped the Maximum setting to 90 and so far the delay seems to have disappeared. I'll keep testing.

    I read that any setting of Maximum over 100 might have a negative impact on delay. Anyone have any reccomendations on what settings should normally be for an adaptive jitter buffer? or does it just vary from network to network?

    Thanks again
     
  6. Anonymous

    Anonymous Guest

    Yep it is weird, but your config should be ok to run without any delay.

    Perhaps I see "ghosts" and just got lucky by a new install.

    I had all the jitter, latency, goodputh, throughput etc configured spot on and still had a bit of delay. Than I swapped it over to another disk, (disabled VirusScanning etc onit) and whoala MOS of 4.5 all the time.

    I am not saying it is the rule, try to configure you network first. You have enough grunt on the box.
     

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