Unified CM release trains and lifecycle dates

Verified 2026-09-04 · 8 claims · sources tier 2

Also known as CUCM, Call Manager, IM&P, SME, UCM, Unified CM.

This knowledge article details the documented release information and lifecycle milestones for specified on-premises calling applications. It provides the specific build numbers, maintenance timelines, and end-of-life milestones associated with the covered versions 2​6.

Release trains and build numbers

The most recent Cisco Unified Communications Manager release documented at the time of research is Release 15SU4a, paired with IM and Presence Service Release 15SU4 2. Build numbers for that release are 15.0.1.14901-2 for Unified Communications Manager 15SU4a and 15.0.1.14900-8 for IM and Presence Service Release 15SU4 1.

Version 14 perpetual lifecycle milestones

The end-of-life announcement for Cisco Version 14 on-premises calling applications under perpetual licensing, including Unified Communications Manager, was distributed on 7 October 2024 6. The end-of-sale date for Version 14 perpetual on-premises calling applications was 7 April 2025 4. The last ship date for Version 14 perpetual on-premises calling application SKUs was 6 July 2025 8.

The end of software maintenance releases for Version 14 perpetual on-premises calling applications was 7 April 2026, meaning Cisco may no longer issue maintenance or bug-fix builds for that release 5. The last date of support for Version 14 perpetual on-premises calling applications is 30 April 2027, after which Cisco states all support services are unavailable and the product is obsolete 7.

Lifecycle index verification

Field observations suggest that the Cisco end-of-life notice index page for Unified Communications Manager did not list the Version 14 perpetual bulletin, so that index cannot be treated as an exhaustive record of lifecycle notices 3.

Applicability

• Vendor: Cisco
• Products: Unified Communications Manager, IM and Presence Service
• Deployment: On-premises
• Releases covered: Version 14 (perpetual licensing) and Release 15SU4 / 15SU4a

What remains uncertain

• Whether the Cisco end-of-life notice index page omits other historical bulletins beyond the Version 14 perpetual bulletin.

WarmTransfer. (2026, September 4). Unified CM release trains and lifecycle dates. WarmTransfer. https://warmtransfer.net/knowledge/cucm-versions-lifecycle

@misc{warmtransfer-cucm-versions-lifecycle,
  title  = {Unified CM release trains and lifecycle dates},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/cucm-versions-lifecycle},
  note   = {Verified 2026-09-04}
}