A Unified CM Release 15 SIP trunk can have up to 16 destination addresses (IPv4, IPv6 or FQDN) or a single DNS SRV record.
Checked 2026-10-02
- Vendor
- Cisco
- Product
- Unified Communications Manager
- Subsystem
- SIP trunk
- Deployment
- on-premises
- Region
- not restricted
- Release range
- Release 15 and SUs
- Checked
- 2026-10-02
Sources
- System Configuration Guide for Cisco Unified Communications Manager Release 15 and SUs - Configure Trunks — Cisco · tier 2 current vendor documentation · Configure Trunks > SIP Trunk Overview
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting Unified CM SIP trunks that show No Service: source note cucm-sip-trunk-no-service-troubleshooting-max-16-dest. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-sip-trunk-no-service-troubleshooting-max-16-dest
BibTeX
@misc{warmtransfer-claim-cucm-sip-trunk-no-service-troubleshooting-max-16-dest,
title = {Troubleshooting Unified CM SIP trunks that show No Service: source note cucm-sip-trunk-no-service-troubleshooting-max-16-dest},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-sip-trunk-no-service-troubleshooting-max-16-dest},
note = {Source note cucm-sip-trunk-no-service-troubleshooting-max-16-dest, checked 2026-10-02}
}