One way audio when using officelink

[jamescrumble]

We have a Mitel 3300 running on BT SIP lines and we have a number of users who are experiencing one way audio issues when using officelink.

The problem manifests itself in one of three ways:

1) On inbound/outbound calls, the user (my colleague) can not hear the other party

2) On inbound/outbound calls, the other party can not hear the user (my colleague)

3) On outbound calls, the other party answers the call but hears a 'ringing' tone still

 

[wireman50]

SIP ALG turned on on the gateway?, Hipcom don't like it.

 

[jamescrumble]

SIP ALG is turned off.

Seems to be only intermittent, not on every call.

Also only affects the users who call using officelink. People using MiCollab on pPCs, and using desk phones have no issues.