Cisco Cisco 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 Expressway cannot be used for Jabber Guest when it is used for MRA.
n
The Expressway-C 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 Expressway-C.
required, this must be configured on a stand-alone Expressway-C.
n
Secure XMPP traffic between Expressway-C and IM&P servers (XMPP traffic is secure between
Expressway-C and Expressway-E, and between Expressway-E and remote endpoint).
Expressway-C and Expressway-E, and between Expressway-E 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 Expressway deployment supported only one IM&P domain (even though IM and
Presence Service 10.0 or later supports Multiple Presence Domains).
Presence Service 10.0 or later supports Multiple Presence Domains).
l
As of X8.5, you can create multiple deployments on the Expressway-C, 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, and we
currently recommend that you do not exceed 50 domains.
currently recommend that you do not exceed 50 domains.
n
NTLM authentication via the HTTP proxy.
n
Maintenance mode; if the Expressway-C or the Expressway-E is placed into maintenance mode, any
existing calls passing through that Expressway will be dropped.
existing calls passing through that Expressway will be dropped.
n
The Expressway-E 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 Small / Medium VM servers).
as Small / Medium VM servers).
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 Expressway systems and failover considerations
You can configure a cluster of Expressway-Cs and a cluster of Expressway-Es to provide failover
(redundancy) support as well as improved scalability.
(redundancy) support as well as improved scalability.
contained in Configure DNS for Cisco Jabber.
Unified Communications Mobile and Remote Access via Cisco Expressway Deployment Guide (X8.6)
Page 44 of 55
Additional information