Cisco Cisco TelePresence Video Communication Server Expressway
15
H.323 call with registered endpoint with public IP address
VCS Expressway
source port
Internet endpoint
server (listening) port
VCS Expressway
server (listening) port
Internet endpoint
source port
Call direction
Outbound to an endpoint in the
Internet
Inbound from an endpoint in the
Internet
Open firewall
DMZ to Internet
Internet to DMZ
IP address
IP address of
VCS Expressway
Any IP address
IP address of
VCS Expressway
Any IP address
IP Po
rt
s
Initial RAS
connection
connection
-
-
UDP R
E
1719
UDP J
1719
Q 931 / H.225
signaling
signaling
TCP P
15000 to 19999
TCP G
1720
TCP M
1720
TCP K
1720
H.245
TCP P
15000 to 19999
TCP H
>= 1024
TCP P
15000 to 19999
TCP H
>= 1024
RTP
UDP Y
E
36000 to 59999 **
UDP E
>= 1024
UDP Y
E
36000 to 59999 **
UDP E
>= 1024
RTCP
UDP Y
E
36000 to 59999 **
UDP E
>= 1024
UDP Y
E
36000 to 59999 **
UDP E
>=1024
public
Internet
R
E
= Protocols > H.323 > Gatekeeper Registration >
UDP port, default = 1719
J = Endpoint RAS source port, typically 1719
P = Protocols > H.323 > Gatekeeper > Call signaling
P = Protocols > H.323 > Gatekeeper > Call signaling
port range start to end: default = 15000 to 19999
G = Endpoint signaling port, specified in registration:
any port >= 1024, typically 1720
M = Protocols > H.323 Call signaling TCP port:
default = 1720
K = Endpoint signaling port: any port >= 1024,
typically 1720
H = Endpoint H.245 signaling port:
= any IP port >= 1024
= 15000 to 19999 to another VCS
= 5555 to 5574 for MXP static setting
= 11000 to 65000 for MXP dynamic setting
= 15000 to 19999 to another VCS
= 5555 to 5574 for MXP static setting
= 11000 to 65000 for MXP dynamic setting
Y
E
= Local Zone > Traversal Subzone > Traversal
Media port start to end (configured on VCS
Expressway): default =
Expressway): default =
36000 to 59999 **
E = Endpoint media port range; value used is
specified in codec negotiations:
= any IP port above 1024
=
= any IP port above 1024
=
36000 to 59999 **
for another VCS
= 2326 to 2385 for MXP static setting
= 11000 to 65000 for MXP dynamic setting
= 11000 to 65000 for MXP dynamic setting
** The default media port range of 36000 – 59999 applies to
new installations of X8.1 or later; the previous default range
of 50000 - 54999 still applies to earlier releases that have
upgraded to X8.1.
new installations of X8.1 or later; the previous default range
of 50000 - 54999 still applies to earlier releases that have
upgraded to X8.1.
VCS Control
VCS Expressway
DMZ