Cisco Expressway Administrator Guide (X15.3)

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Updated:: August 5, 2025

What's New in This Version?

New features from software version X12.5 and later are not supported for the Cisco VCS product, and apply only to the Cisco Expressway product. For VCS systems, this version is provided for maintenance and bug fixing purposes only.

Table 1. Features by Release Number
Feature / Change	Status
Several features and enhancements have been implemented to improve security, accessibility, and functionality. Follow the link to read the latest information about the open and resolved issues for this release. Addressed a few Customer Defects.	Supported from X15.3
Introduced a few xConfiguration commands: xConfiguration MRACookieConfig Httponly xConfiguration MRACookieConfig Expiry	Supported from X15.2
Enabling/Disabling the Cross-Site Request Forgery (CSRF) Protection Header	Supported from X15.0
Enable PreRoutedRouteHeader (PRRH) on the Expressway Select image	Supported from X15.0
LDAP TLS supports different ports other than 636 and 3269	Supported from X15.0
Banned ciphers are removed that are offered by default TLS_DHE_RSA_WITH_AES_128_CCM TLS_RSA_WITH_AES_256_CCM TLS_RSA_WITH_AES_128_CCM	Supported from X15.0
WebRTC session counter on Web User Interface for Expressway-E	Supported from X15.0
Set the Default value of SIP TLS DH key size to 2048 for Fresh Install and Upgrade	Supported from X14.3
Route calls to US Suicide Prevention Hotline (988) without RMS licenses	Supported from X14.3
Support for Elliptic Curve Digital Signature Algorithm (ECDSA) Certificate, Update to the Command Line Interface	Supported from X14.3
Smart Licensing	Supported from X14.2 Capped at 2500 encrypted signaling sessions to endpoints
SIP Registration Failover for Cisco Jabber - MRA Deployments	Supported from X14.0
XCP Support for Jabber Zero Downtime	Supported from X14.0
Expressway Cluster Load Balancing Not Applicable to SIP Federation	Supported from X14.0
Escalation from P2P to Meeting	Supported from X14.0
AV1 Support	Supported from X14.0
Webex Client Embedded Browser Support	Supported from X14.0
Dedicated Management Interface	Supported from X12.7
Fast Path Registration for MRA (Caching Optimization for Registrations)	Supported from X12.7
Webex VDI for MRA	Supported from X12.7
Virtualized Systems - ESXi 7.0 Qualification	Supported from X12.7
Hardware Security Module (HSM) Support	Preview
MRA SIP Registration Failover (Phone HA Support)	Preview
MRA Mobile Application Management clients	Preview
MRA Android Push Notifications for IM&P	Preview (disabled by default from X12.6.2)
MRA Headset Capabilities for Cisco Contact Center	Preview

More information

For information about a particular feature, see the Release Notes for the relevant software version.

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