E129 9611G IP phone with H.323 fw 6.2313 or 6.4014 shows incorrect one-way network delay statistics: values vary from -13500 ms to +25000 ms

Doc ID    SOLN268268
Version:    4.0
Status:    Published
Published date:    12 Apr 2016
Created Date:    09 May 2015
Author:   
Levente Szabo
 

Details

9611G IP phone,  firmware is H.323 6.2313 and  6.4014.and on E129 with firmware 1.0.2

Problem Clarification

E129, 9611G reports incorrect RTCP network delay statistics while calling voicemail. For example: calling from a 9611G  -running H.323 6.2313 or 6.4014 firmware- to Modular Messaging (any of the 2 MSS), looking at the real time network info in phone menu: One-way network delay values observed in real time on the phone vary from -13500 ms to +25000 ms, these are unrealistic values. The call quality for all calls to voicemail is OK but the incorrect data results in bad score in global RTCP QoS reports.

Statistics look correct when calling from a 9620L IP phone.

Cause

firmware issue

Solution

There are some fixes regarding incorrect network delay measures in latest 96x1 h.323 fw: 6.6 which can be download from here:
https://support.avaya.com/downloads/download-details.action?contentId=C20154101513453530_2&productId=P0553&releaseId=H.323%206.6.x 
 

As per release notes:
https://downloads.avaya.com/css/P8/documents/101009359 
H.323 6.6.0 Resolved Issues
ID                            Issue Description
10802                    RTCP packets are not sent occasionally for shuffled calls and causes to the statistics (including round trip delay) to be sent with a zero value (SR: 1-5055274022) 
  
 
Note: there is also an unresolved one so check if E129 is involved in the problematic call scenario:
H.323 6.6.0 unresolved issues:
ID                            Issue Description
11041                    Network delay values are high when a call is created between deskphone and E129 endpoints. 


  https://downloads.avaya.com/css/P8/documents/101018219  (Page 13)

fix for the issue “Item 795 - RTCP DLSR field is showing delay though there is no such delay “  has been planned to  deliver it in the service pack 3 targeted for release in September'16.

 

 

Note : Currently it is numbered SP3 but this is a tentative number/name and it might change.


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