calls not stable between two different buildings

[jeedme]

Hi guys,

we are connect two building through L2VPN ( HQ & Branch ).

users phones in ( Branch ) are connected to ( HQ )'s CUCM without any issues, but the calls between the users in these buildings sometimes works and sometimes having issue with audio. ( ring reach but the caller cannot hear the responder ).

HQ and Branch are allowed those ports :

TCP- UDP  24576 - 32767

TCP  5060 - 5061

Phones uses SIP protocol

[Roger Kallberg · Accepted solution]

Problem with call quality is often related to network errors. You should start by looking at that end for your issues.