Cisco Cisco TelePresence Video Communication Server Expressway
4.
Click Save.
5.
Repeat these steps until all Lync devices that need to be trusted have been added.
Notes:
■
Note that trusted host verification only applies to calls initiated by Lync that are inbound to the VCS video
network. It is not necessary to configure trusted hosts if calls are only ever to be initiated from the VCS video
network.
network. It is not necessary to configure trusted hosts if calls are only ever to be initiated from the VCS video
network.
■
The VCS has a limit of 25 trusted hosts. If there are more than 25 trusted hosts, the VCS raises an alarm. You
can work around this limit by adding another Gateway VCS, or by pointing some of the Lync servers to a Lync
proxy and then trusting the proxy instead.
can work around this limit by adding another Gateway VCS, or by pointing some of the Lync servers to a Lync
proxy and then trusting the proxy instead.
Neighbor the Gateway VCS to the VCS Control
Note:
In earlier versions of this document, this step was optional, depending on whether you hosted the Gateway
functionality on the VCS that was acting as registrar. We are no longer recommending that you use one VCS for both
purposes, because of the additional CPU resources required for transcoding Lync desktop sharing sessions.
purposes, because of the additional CPU resources required for transcoding Lync desktop sharing sessions.
1.
Go to Configuration > Zones > Zones.
2.
Click New.
We recommend that the connection to the Gateway VCS uses SIP over TLS to communicate so that
encrypted calls can be handled.
encrypted calls can be handled.
3.
Configure the following fields, leaving others with their default values:
Name
"To video network"
Type
Neighbor
H.323 mode
Off
SIP mode
On
Port
5061 (or the value that matches the SIP TLS port configured on the VCS
Control)
Control)
Transport
TLS
Accept proxied registrations
Deny
Location: Peer 1 address
IP address or FQDN of the VCS Control (or the master peer if it is a
cluster)
cluster)
Location: Peer 2 to Peer 6
address
address
IP address or FQDN of the 2nd to 6th video network cluster peers (if
required)
required)
29
Cisco VCS and Microsoft Lync Deployment Guide
Configuration