Cisco Cisco TelePresence Video Communication Server Expressway
8
SIP traversal call
public
Internet
VCS Control
source port
VCS Expressway
server (listening) port
Call direction
Inbound and outbound calls
Open firewall
Private to DMZ
IP address
IP address of
VCS Control
IP address of
VCS Expressway
IP Po
rt
s
SIP signaling
TCP & TLS A
25000 to 29999
TCP and TLS B
7001
Assent RTP
(traversal media)
UDP Y
C
50000 to 52399
UDP V
2776
Assent RTCP
(traversal media)
UDP Y
C
50000 to 52399
UDP W
2777
A = Protocols > SIP > Configuration > TCP Outbound port start to end: default =
25000 to 29999
B = Zones > Traversal Client > SIP port, typically 7001 for first traversal zone, 7002
for second etc.
Y
C
= Local Zone > Traversal Subzone > Traversal Media port start to end
(configured on VCS Control): default = 50000 to 52399
V = VCS Expressway > Ports > Media demultiplexing RTP port: default = 2776
W = VCS Expressway > Ports > Media demultiplexing RTCP port: default = 2777
VCS Control
VCS Expressway
DMZ