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Pickup issue

Publication Date:  2017-08-24 Views:  368 Downloads:  0
Issue Description

Lets assume this Network topology 

Let assume that  Extension A register with Site A and Extension B and Extension C register with Site B . and also Extension C configured to pickup calls from Extension B .

when the call come from any extension of site A to extension B or Extension C the call pass normally but when Ext. A try to call Ext B and Ext C try to pick up the call then the call Drop and Ext C can't hear any sound from Ext. A and also Ext. A hear Echo .

after checking we found the customer has another sites and when any call come from any site expect Site A  , Ext. C can pick up the call normally but the issue is with Site A only .

Handling Process

As it appear the problem is with Media so :

  1. frist step we try to enabe trunkle all codecs type on both trunks connect between two site but no luck the issue not solved .
  2. try to enable Heartbeat on both trunks but also no luck .
  3.   I have been checked the logs and found that the Root cause of this issue is due to media negotiation error as shown pic
  4.  From The sip message flow of the ip phone C, we can see the voice media type was different between ip phone A(G.711A) and ip phone C(G.711U)

and this is Bug in the version V200R003C00SPC300B013 so the solution was to upgarde U1960 to V200R003C20SPCb00


the solution is Upgarde to this version  V200R003C20SPCb00