Cisco Cisco Expressway Release Notes
Open issues
Cisco Expressway X8.1.1 Software Release Notes
Page 4 of 14
Open issues
The following issues apply to this version of Cisco Expressway.
Identifier
Description
CSCuh64828
Symptoms: H.323 call black screen after session refresh (with default configuration, after
approximately 15 minutes of conference call).
approximately 15 minutes of conference call).
Conditions: Conference call with H.323 call.
Workaround: Perform a Hold / Resume. Alternatively, use SIP as call protocol instead of H.323.
CSCum90139 Symptoms: Expressway X8.1 uses the Ethernet 2 IP address for the media part in SDP rather
than the configured Static NAT IP address. This results in calls failing on the media part.
Conditions: Running Expressway X8.1 with Static NAT and encryption B2BUA enabled (a media
encryption policy other than Auto).
encryption policy other than Auto).
Workaround: Recommended configuration for Expressway-C with Expressway-E deployments
is to configure the same media encryption policy setting on the traversal client zone on
Expressway-C, the traversal server zone on Expressway-E, and every zone on Expressway-E,
and to only use static NAT on the Expressway-E. With this configuration the encryption B2BUA
will only be enabled on the Expressway-C.
is to configure the same media encryption policy setting on the traversal client zone on
Expressway-C, the traversal server zone on Expressway-E, and every zone on Expressway-E,
and to only use static NAT on the Expressway-E. With this configuration the encryption B2BUA
will only be enabled on the Expressway-C.
Table 2: Open issues
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)
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.