Cisco Unified SRST Administration Guide (All Versions) - Enhanced SRST

Publisher

Cisco Systems

URL

https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cusrst/admin/sccp_sip_srst/configuration/guide/SCCP_and_SIP_SRST_Admin_Guide/enhanced_srst.html

Published

2026-04-25

Updated

unknown

Accessed

2026-09-24

HTTP status

200

License

Cisco documentation; all rights reserved; no-redistribution; short excerpts and locators only

Source notes citing this source

• The C8375-E-G2 is supported for E-SRST from Cisco IOS XE 17.18.2, and is listed in SRST 15.0 with virtual DSP enabled. in context
• E-SRST adds features beyond classic SRST, including advanced voice hunt groups (HLog, statistics, mixed SIP/SCCP members), shared lines, BLF monitoring, video calls and basic ACD (B-ACD). in context
• Unified E-SRST requires one SRST_E_EP license entitlement for each configured SIP or SCCP phone. in context
• Enhanced SRST is enabled with mode esrst under telephony-service for SCCP phones and under voice register global for SIP phones. in context
• Cisco Unified SRST Manager is end-of-life, and E-SRST is now provisioned only manually through the CLI. in context
• Enhanced SRST is supported on the Catalyst 8300 from IOS XE Amsterdam 17.3.2 and on the Catalyst 8200 from IOS XE Bengaluru 17.4.1a. in context
• Enhanced SRST adds voice hunt groups, shared lines, Busy Lamp Field monitoring, video between local SIP phones and B-ACD, none of which classic Unified SRST provides. in context
• E-SRST Smart Licensing needs one endpoint entitlement per configured phone, counting ephones and voice register pools whether or not they are registered. in context
• Enhanced SRST release 12.2 and later cannot be provisioned through Cisco Unified SRST Manager. in context

Cite this source record

APA

WarmTransfer. (2026, April 25). Cisco Unified SRST Administration Guide (All Versions) - Enhanced SRST. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-srst-admin-enhanced-srst

BibTeX

@misc{warmtransfer-cisco-srst-admin-enhanced-srst,
  title  = {Cisco Unified SRST Administration Guide (All Versions) - Enhanced SRST},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-srst-admin-enhanced-srst},
  note   = {Cisco Systems, accessed 2026-09-24}
}