The device pool SRST Reference field in Unified CM has three settings: Disable, Use Default Gateway (the phone's IP gateway acts as the SRST gateway), or a user-defined SRST reference.

Checked 2026-09-24

Vendor
Cisco
Product
Cisco Unified Communications Manager
Subsystem
srst-reference
Deployment
on-premises, dedicated-instance
Region
not restricted
Release range
CUCM 15 and SUs
Checked
2026-09-24

Sources

Cite this note

APA

WarmTransfer. (2026, September 24). Remote site survivability patterns: source note survivability-remote-site-cucm-srst-options. WarmTransfer. https://warmtransfer.net/knowledge/claims/survivability-remote-site-cucm-srst-options

BibTeX

@misc{warmtransfer-claim-survivability-remote-site-cucm-srst-options,
  title  = {Remote site survivability patterns: source note survivability-remote-site-cucm-srst-options},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/survivability-remote-site-cucm-srst-options},
  note   = {Source note survivability-remote-site-cucm-srst-options, checked 2026-09-24}
}

Read in context