Cisco Cisco TelePresence Video Communication Server Expressway
Enable Calls to Lync
Command or Action
Purpose
Prepare the Gateway VCS to work in your environment: configure
DNS and NTP, and enter a cluster name
DNS and NTP, and enter a cluster name
To route calls destined for Lync domains towards the Gateway VCS
Enable SIP TLS, trust the Gateway VCS, and configure media
encryption
encryption
To route calls destined for Lync domains towards the internal Lync
environment
environment
To verify this part of the configuration.
Table 3 Overview of Tasks Required to Enable Calls from Collaboration Endpoints to Lync Clients (All Internal)
Configure the Gateway VCS
Command or Action
Purpose
To enable TLS to the Lync Server environment
So that the Gateway VCS can resolve trusted Lync
Servers (B2BUA hosts)
Servers (B2BUA hosts)
So that Lync Server static routes can resolve the
Gateway VCScluster
Gateway VCScluster
To synchronize the Gateway VCS with thte Lync Server
environment
environment
To enable TLS to the Lync Server environment
Table 4 Prepare the Gateway VCS for the Network
Task 1: Load CA Certificate and Server Certificate to Gateway VCS
Obtain and load the CA certificate, server certificate, and private key onto each Gateway VCS.
Specify and Request the Certificate
■
For mutual TLS authentication, the server certificate must also be able to authenticate the VCS as a client.
■
The server certificate for the Gateway VCS must contain its FQDN as the Common Name. If the Gateway VCS
is part of a cluster, the FQDN of the cluster and the peer in the cluster must be included as SANs.
is part of a cluster, the FQDN of the cluster and the peer in the cluster must be included as SANs.
Cisco Systems, Inc.
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