Cisco Cisco Expressway Release Notes
Limitations
Cisco Expressway Software Release Notes (X8.2.1)
Page 9 of 18
Limitations
Unsupported features (general)
n
DTLS is not supported through the Expressway-C/Expressway-E; attempts to make secure calls will fail
n
SIP Early Media
n
SIP KeyPad Markup Language (KPML)
n
Audio calls may be licensed as video calls in some circumstances. Calls that are strictly audio-ONLY
consume fewer licenses than video calls. However, when audio calls include non-audio channels, such as
the iX channel that enables ActiveControl, they are treated as video calls for licensing purposes.
consume fewer licenses than video calls. However, when audio calls include non-audio channels, such as
the iX channel that enables ActiveControl, they are treated as video calls for licensing purposes.
Unsupported Jabber features when using mobile and remote access
n
Directory access mechanisms other than UDS
n
Certificate provisioning to remote endpoints e.g. CAPF
n
File transfer (except when operating in hybrid Webex mode)
n
Deskphone control (QBE/CTI)
n
Additional mobility features including DVO-R, GSM handoff and session persistency
n
Self-care portal
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
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; each Expressway deployment supports only one IM&P domain
(even though IM & Presence 10.0 or later supports multiple IM&P domains)
(even though IM & Presence 10.0 or later supports multiple IM&P domains)
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
NTLM authentication via the HTTP proxy
n
Maintenance mode; if an Expressway-C or Expressway-E is placed into maintenance mode, any existing
calls passing through that Expressway will be dropped
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)
Supported clients when using mobile and remote access
n
Cisco Jabber for Windows 9.7 or later
n
Cisco Jabber for iPhone and iPad 9.6.1 or later