Microsoft Lync B2Bua Port Reference - Cisco TelePresence Administrator's Manual

Reference material

Microsoft Lync B2BUA port reference

The port numbers listed below are the default port values. The values used in a real deployment may vary if
they have been modified, for example, by changes of registry settings or through group policy, on Lync and
Lync client, or configuration on VCS
Between B2BUA and Lync
Purpose
Signaling to Lync Server
Signaling from Lync Server
Presence to Lync Server
Presence from Lync Server
Media (the Lync B2BUA should be
deployed on a separate "Lync Gateway"
VCS and thus there should be no conflict
with the standard traversal media port
range)
Between B2BUA and VCS (internal communications)
Purpose
Internal communications with VCS
application
Between B2BUA and VCS Expressway hosting the TURN server
Purpose
All communications
Ensure that the firewall is opened to allow the data traffic through from B2BUA to VCS Expressway.
* On Large VM server deployments you can configure a range of TURN request listening ports. The default
range is 3478 – 3483.
External Lync client and Edge server
Purpose
SIP/MTLS used between Lync Client
and Edge server for signaling (including
any ICE messaging to the Edge Server)
SIP/TLS
Cisco VCS Administrator Guide (X8.1.1)
(Applications > B2BUA).
Protocol B2BUA IP port
TLS 65072
TLS 65072
TLS 10011
TLS 10011
UDP 56000 to 57000
Protocol B2BUA IP port
TLS 65070
Protocol B2BUA IP port
UDP 56000 to 57000
Protocol Edge server
TCP 5061
TCP 443
Microsoft Lync B2BUA port reference
Lync IP port
5061 (Lync signaling destination
port)
Lync ephemeral port
5061 (Lync signaling destination
port)
Lync ephemeral port
Lync client media ports
VCS IP port
SIP TCP outbound port
VCS Expressway IP port
3478 (media/signaling) *
Lync client
5061
443
Page 397 of 507