Cisco TelePresence Administrator's Manual page 398

Reference material
Purpose
STUN
UDP Media
TCP Media
External Lync client / Edge server and VCS Expressway
Purpose
ICE messaging (STUN/TURN) if media
is sent via the VCS Expressway
UDP media if it is sent via the VCS
Expressway
** The default TURN relay media port range of 24000 – 29999 applies to new installations of X8.1 or later. The
previous default range of 60000 – 61799 still applies to earlier releases that have upgraded to X8.1.
Between B2BUA and transcoder
Purpose
B2BUA communications with transcoder
(Cisco AM GW)
Cisco VCS Administrator Guide (X8.1.1)
Protocol Edge server
UDP 3478
UDP 50000-59999
TCP 50000-59999
Protocol Lync client / Edge
server
UDP 3478
UDP 1024-65535
Protocol B2BUA IP port
TLS 65080
Microsoft Lync B2BUA port reference
Lync client
3478
1024-65535
1024-65535
VCS Expressway
3478
24000-29999 **
Transcoder
5061
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