Source note · SRST on Cisco IOS XE
The SRST feature roadmap for release 15.0 says a Collaboration Flex subscription is required for ongoing support, alongside the switch to reporting a flex subscription entitlement tag.
Checked 2026-09-25
- Vendor
- Cisco
- Product
- Cisco Unified SRST
- Subsystem
- licensing
- Deployment
- on-premises
- Region
- not restricted
- Release range
- Unified SRST 15.0 (IOS XE 17.18.1a and later)
- Checked
- 2026-09-25
Sources
- Cisco Unified SRST Administration Guide (All Versions) - Cisco Unified Survivable Remote Site Telephony Feature Roadmap — Cisco · tier 2 current vendor documentation · Feature Roadmap > Unified SRST 15.0 row
Cite this note
APA
WarmTransfer. (2026, September 25). SRST on Cisco IOS XE: source note srst-configuration-flex-required-15. WarmTransfer. https://warmtransfer.net/knowledge/claims/srst-configuration-flex-required-15
BibTeX
@misc{warmtransfer-claim-srst-configuration-flex-required-15,
title = {SRST on Cisco IOS XE: source note srst-configuration-flex-required-15},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/srst-configuration-flex-required-15},
note = {Source note srst-configuration-flex-required-15, checked 2026-09-25}
}