Thursday, March 28, 2013

Lync Calls Failing with error code0x12b

Issue :

ms-client-diagnostics: 22; reason="Call failed to establish due to a media connectivity failure when both endpoints are internal";CallerMediaDebug="audio:ICEWarn=0x12b,LocalSite=



This might be because of internal VLAN restrictions implemented. Because of those rules, Users are not able to contact the VoIP device .

Resolution :

Check there is no restrictions implemented between the user VLAN and the VoIP devices. If that could not be changed, check the MRAS server internal IP address is reachable from both the VoIP device and the user system

1 comment:

  1. It is impossible to live without failing at something, unless you live so cautiously that you might as well not have lived at all, in which case you have failed by default. See the link below for more info.