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
36002 to 59999 **
UDP Y
E
36000 to 36001 **
Assent RTCP
(traversal media)
UDP Y
C
36002 to 59999 **
UDP Y
E
36000 to 36001 **
A = Protocols > SIP > 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 = 36000 to 59999 **
Y
E
= Local Zone > Traversal Subzone > Traversal Media port start to end
(configured on VCS Expressway): default = 36000 to 59999 **
** The default media port range of 36000 to 59999 applies to new installations of X8.1 or
later. The first 2 ports in the range are used for multiplexed traffic only (with Large VM
deployments the first 12 ports in the range – 36000 to 36011 – are used). The previous
default range of 50000 - 54999 still applies to earlier releases that have upgraded to X8.1.
later. The first 2 ports in the range are used for multiplexed traffic only (with Large VM
deployments the first 12 ports in the range – 36000 to 36011 – are used). The previous
default range of 50000 - 54999 still applies to earlier releases that have upgraded to X8.1.
VCS Control
VCS Expressway
DMZ