Cisco Cisco TelePresence Video Communication Server Expressway
n
Support for Jabber SDK
n
Shared lines are supported in a limited way. Multiple endpoints can share a line but in-call features (like
hold/resume) only work on the first endpoint that answers. Endpoints sharing the line may not correctly
recognise the state of the call.
hold/resume) only work on the first endpoint that answers. Endpoints sharing the line may not correctly
recognise the state of the call.
Unsupported features and limitations when using mobile and remote
access
access
n
The VCS cannot be used for Jabber Guest when it is used for MRA.
n
Secure XMPP traffic between VCS Control and IM&P servers (XMPP traffic is secure between VCS
Control and VCS Expressway, and between VCS Expressway and remote endpoint).
Control and VCS Expressway, and between VCS Expressway and remote endpoint).
n
Endpoint management capability (SNMP, SSH/HTTP access).
n
Multi-domain and multi-customer support is limited as follows:
l
Prior to X8.5, each VCS deployment supported only one IM&P domain (even though IM and Presence
Service 10.0 or later supports Multiple Presence Domains).
Service 10.0 or later supports Multiple Presence Domains).
l
As of X8.5, you can create multiple deployments on the VCS Control, but this feature is still limited to
one domain per deployment.
one domain per deployment.
l
As of X8.5.1, a deployment can have Multiple Presence Domains. This feature is in preview with X8.5.1,
and we currently recommend that you do not exceed 10 domains.
and we currently recommend that you do not exceed 10 domains.
n
Mobile and remote access functionality is not within the FIPS boundary.
n
The VCS Control used for Mobile and Remote Access cannot also be used as a Lync 2013 gateway (if
required, this must be configured on a stand-alone VCS Control.
required, this must be configured on a stand-alone VCS Control.
n
NTLM authentication via the HTTP proxy.
n
Maintenance mode; if a VCS-C or VCS Expressway is placed into maintenance mode, any existing calls
passing through that VCS will be dropped.
passing through that VCS will be dropped.
n
The VCS Expressway must not have TURN services enabled.
n
Deployments on Large VM servers are limited to 2500 proxied registrations to Unified CM (the same limit
as VCS appliances or equivalent VM).
as VCS appliances or equivalent VM).
Protocol summary
The table below lists the protocols and associated services used in the Unified Communications solution.
Protocol
Security
Service
SIP
TLS
Session establishment – Register, Invite etc.
HTTPS
TLS
Logon, provisioning/configuration, directory, visual voicemail
RTP
SRTP
Media - audio, video, content sharing
XMPP
TLS
Instant Messaging, Presence, Federation
Clustered VCS systems and failover considerations
You can configure a cluster of VCS Controls and a cluster of VCS Expressways to provide failover
(redundancy) support as well as improved scalability.
(redundancy) support as well as improved scalability.
Unified Communications Mobile and Remote Access via Cisco VCS Deployment Guide (X8.5.3)
Page 43 of 54
Additional information