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Static on a Definity System

  • 1.  Static on a Definity System

    Posted 11-30-2009 12:41 PM
    We are running CM 3.1 on a S8720 (that has a backup S8720 mirroring it).

    We recently went from a fiber link backbone in a star array to an IP backbone in a ring configuration between 19 EPNs.

    After the cutover from the fiber link connections to IP, we ran into such issues as:

    1. Credit card machines no longer able to make connections off-campus unless we moved their dial tone source (ELL) to a single cabinet that did not utilize the IP backbone.

    2. TDD/TTY phones either not answering an incoming call or not recognizing when an outbound call was answered. (Meaning I call from station A and Station B answers and send an automatic reply which Station A never gets OR Station A is called by Station B and never answers)

    3. Now it has been reported by several 8434DX stations and 4620SW IP stations that static and crackle is coming across calls, which can be from campus to campus or from off-campus to campus. This is a problem that at least for one person has been happening for the past two months.

    I've done research on these forums but some of the information is over a year old so I was wondering if anybody had any updates on things I can try to eliminate this static?

    Thank you!


  • 2.  Static on a Definity System

    Posted 11-30-2009 06:16 PM
    For issues 1 and 2, you need to look at how the ip-codec-set assigned to your medpros are handling fax/modem and TTY calls, they have specific settings which are defined in the ip-codec-set.. if eliminating the port network to port network communication solves the problem, then this is the first place you should look.

    You should also check all medpros in all cabinets, make sure speed duplex is correct.. no errors or alarms in CM etc..

    Static is usually not an issue associated with VoIP issues.. however if users can't use certain trunks because of some of the other IP issues it sounds like you have perhaps they are taking different talk paths then they usually do and it's uncovering some other issues in the process....


  • 3.  Static on a Definity System

    Posted 12-01-2009 01:22 PM
    I'll definitely take a look at these issues.

    Let me add one other thing.
    The VoiP phones are not the only phones experiencing the static/crackle on the lines.

    I have 8434DX digital phones that also get the noise in the background. It doesn't happen on every call made or taken by a particular phone but it does happen.

    I'm still going to be looking at the cards that affect the port network communications right?


  • 4.  Static on a Definity System

    Posted 12-01-2009 01:58 PM
    Yes.. the end unit doesn't matter.. since your networks are now IP connected, every call is a "VoIP" call, whether the phone is TDM, analong, or even IP.. as long as you're crossing portnetworks, you're using voice over IP, and the call is being carried via the medpros.


  • 5.  Static on a Definity System

    Posted 12-03-2009 05:23 AM
    Gosh...I knew that. I'm sorry! Thank you!


  • 6.  Static on a Definity System

    Posted 12-08-2009 08:52 AM
    So, there are no active errors on any MedPros (or CLANs).
    The static is still there.

    Avaya wants to send an engineer, but it is cost prohibitive right now.

    What other things could I be looking for if the static is campus wide?

    Could there be something going on near the "main" node where the S8720 is located that affects the entire system?


  • 7.  Static on a Definity System

    Posted 12-08-2009 11:37 AM
    We had a similar issue at my former company. We found that there were some applications running that took up most of the resources which were a priority over voice. After identifying those resources (re. running CDR updates) the problem went away, most of the time. There were still some other times it occurred. It was suggested by Avaya to have QOS activated. Do you have QOS activated?


  • 8.  Static on a Definity System

    Posted 12-08-2009 11:48 AM
    You should also check your clock sources.. with your gateways ip connected now each port network must have its own clock soruce..

    Run a list measurements ds1 log against the circuits which you hear the static, check for slips or errors.


  • 9.  RE: Static on a Definity System

    Posted 12 days ago

    My lord! that is terrible to hear, I am going to recommend you change that old system and just go with and Avaya CLOUD based system with no need for on-site main system hardware, port all your lines to the cloud.

    cheers



    ------------------------------
    jack didomenico
    CEO
    SafeIP Technologies
    lakeshore ON
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    Original Message


  • 10.  RE: Static on a Definity System

    Posted 12 days ago

    I had to check my calendar to make sure it wasn't April 1st.



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    Tom Lynn
    Forum Moderator
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    Original Message


  • 11.  RE: Static on a Definity System

    Posted 11 days ago
    Edited by Tony Getor 11 days ago

    Looks like I'm missing the joke (from a 2009 thread, that is) s-/



    -------------------------------------
    Tony Getor
    UC/Collaboration Solutions 
    Engineering & Architecture
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    Original Message


  • 12.  RE: Static on a Definity System

    Posted 11 days ago

    Hi Tony,

    I'm not insulting you, just saying more them to a new solution, but i do think your issue is IP Packet losses on the Network its not an Avaya issue.

    cheers!



    ------------------------------
    jack didomenico
    CEO
    SafeIP Technologies
    lakeshore ON
    ------------------------------

    Original Message


  • 13.  RE: Static on a Definity System

    Posted 11 days ago

    The problem outlined appears to be network-related and not Avaya, I agree with the statement.

    Configuration Issues with IP Backbone - If the network isn't optimized for voice traffic (e.g., lack of Quality of Service (QoS) prioritization for voice packets), it can result in poor call quality.

    Network Latency and Jitter- The new IP Network, may have introduced issues like latency, jitter, or packet loss are more common in IP-based networks. These factors can lead to degraded call quality and cause static or crackling on the phones.

    Other considerations that need to be addressed, as stated by others, is that the S8720 and CM 3.1 are pretty old.  This could lead to compatibility problems as I am unfamiliar with everything in your environment.



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    Bill Magnuson
    Consultant
    NexusBlue
    Springboro OH
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    Original Message