Cisco Emergency Responder Version 15SU4 Release Notes

Publisher

Cisco Systems

URL

https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cer/15su4/english/release_notes/guide/cer0_b_cisco-emergency-responder-release-notes-15SU4.html

Published

2026-05-04

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 15SU4 release notes list Microsoft Edge, Chrome and Firefox on Windows 11 (64-bit), and Chrome, Firefox and Safari on macOS 15.5, as supported browsers. in context
• Emergency Responder 15SU4 is compatible with Unified CM 15, Unified CM 14 and its SUs, and Unified CM 12.5(x). in context
• The Emergency Responder 15SU4 release notes were first published on 2026-02-05 and last updated on 2026-05-04. in context
• Emergency Responder 15SU4 introduces fresh install with data import: data is exported from an existing cluster to an SFTP server and imported into a fresh installation, so a version upgrade and a hardware migration can happen together. in context
• Emergency Responder 15SU4 adds support for Cisco NFVIS-for-UC (minimum 4.18.2a), Cisco Compute Hyperconverged with Nutanix (Acropolis 10.0 / AOS 7.0) and VMware vSphere ESXi 8.0; ESXi 7.0 and earlier have reached end of support. in context
• Direct upgrades to Emergency Responder 15 and later are supported only from Release 12.5(1) through 12.5(1)SU9 and from Release 14 through 14SU5; releases before 12.5 need intermediate upgrades. in context
• The 15SU4 VM configurations are 20,000 users on 2 vCPU, 6 GB RAM and 80 GB disk; 30,000 users on 2 vCPU, 6 GB RAM and 110 GB disk; and 40,000 users on 4 vCPU, 6 GB RAM and 110 GB disk. in context

Cite this source record

APA

WarmTransfer. (2026, May 4). Cisco Emergency Responder Version 15SU4 Release Notes. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-cer-relnotes-15su4

BibTeX

@misc{warmtransfer-cisco-cer-relnotes-15su4,
  title  = {Cisco Emergency Responder Version 15SU4 Release Notes},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-cer-relnotes-15su4},
  note   = {Cisco Systems, accessed 2026-09-24}
}