[cisco-voip] 7841 SIP Phone audio issues on some calls

[Erick Bergquist]

Anyone noticing problems on 7841 SIP phones when calling outbound with
a SIP provider?

When we call Microsoft Conference bridge it connects but we can't hear
the bridge.
It works fine from a SCCP phone on same Call Manager and same SIP trunk.
All other calls work on the 7841 outbound.

CUCM Version 10.5.1.10000-7

Firmware: sip78xx.10-1-1SR1-4

Thanks