New and Changed Information

New and Changed Information

The following table provides an overview of the significant changes to the features in this guide up to this current release. The table does not provide an exhaustive list of all changes made to the guide or of the new features up to this release.

Table 1. New Features and Changed Behavior in Unified Communications Manager and IM and Presence Service

Date

Description

See

February 05, 2026

Updated the 'Gateway Overview' section to add support for NSE-based Fax or Modem Passthrough for Secure SIP Lines.

Gateway Overview

July 31, 2025

Support for hardware gateway based conference bridge in CUCM in IPv6.

Conference Bridge Types

Removed support for Call Control Discovery via Service Advertisement Framework in Unified Communications Manager

Call Routing Restrictions

October 1, 2024

Support for Smart Receiver Transport

Configure Connection to Smart Software Licensing (Applicable from Release 14SU4 and 15SU2 Onwards)

October 1, 2024

Updated the 'Configure IP Addressing Preference for Cluster' section to include two Notes regarding the behavior of the IP Addressing Mode Preference for Media enterprise parameter.

Configure IP Addressing Preference for Cluster

December 18, 2023

Added a section that provides information about SRTP DTMF interwork support.

SRTP DTMF Interworking

December 18, 2023

Added the port information related to the Local Push Notification Service (LPNS) feature.

December 18, 2023

Added information about removal of support for H.323 gatekeeper.

H.323 Trunk Overview

December 18, 2023

Added information for Auto Provision of Webex App and Cisco Jabber Devices.

Configure LDAP Directory Synchronization

December 18, 2023

Updated the 'Cisco Smart Software Manager' and 'Cisco Smart Software Manager Satellite' sections to include a note for upgrade conditions.

December 18, 2023

Updated the 'SSO and OAuth Configuration' section for Oauth - Eliminate Refresh token dependency on CUCM publisher

Common Enterprise Parameters

December 18, 2023

Updated the SSO and OAuth Configuration section for Support to renew refresh token automatically

Common Enterprise Parameters