Security Guide for Cisco Unified Communications Manager, Release 15 and SUs - Certificates

Publisher

Cisco Systems

URL

https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/security/15_0/cucm_b_security-guide-release-15/cucm_m_certificates.html

Published

2026-09-22

Updated

unknown

Accessed

2026-09-25

HTTP status

200

License

Cisco website terms of use; copyrighted; no-redistribution; short excerpts and locators only

Source notes citing this source

• On Release 14 and later with default settings, renewing the CallManager, CAPF or TVS certificate will reset phones across the cluster, so these renewals belong in a maintenance window unless Phone Interaction on Certificate Update is set to manual. inferred in context
• Cisco advises against regenerating the ITLRecovery certificate frequently, because it has a long validity with phones and also contains the CallManager certificate. in context
• On Release 14 and later, using multi-server SAN certificates for Tomcat, CallManager and TVS turns a per-node renewal into roughly one renewal per certificate type per cluster. inferred in context
• A multi-server SAN CA-signed certificate applies to the cluster nodes only when it is uploaded to the publisher. in context
• The Release 15 security guide says no specific service restart is needed when the TVS, CAPF or ITLRecovery certificate is regenerated. in context
• Phones reset automatically to download the updated ITL file after the CallManager, CAPF or TVS certificate is regenerated or renewed. in context
• In the Release 15 security guide, the default validity of self-signed certificates is five years. in context
• When generating a self-signed certificate in Release 15, an administrator can choose a validity of 1, 2, 5, 10 or 20 years. in context

Cite this source record

APA

WarmTransfer. (2026, September 22). Security Guide for Cisco Unified Communications Manager, Release 15 and SUs - Certificates. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-cucm-security-15-certificates

BibTeX

@misc{warmtransfer-cisco-cucm-security-15-certificates,
  title  = {Security Guide for Cisco Unified Communications Manager, Release 15 and SUs - Certificates},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-cucm-security-15-certificates},
  note   = {Cisco Systems, accessed 2026-09-25}
}