In a Cisco Unified CM 12.5(1) SIP trunk security profile with Device Security Mode Non Secure, the incoming transport type is TCP+UDP; with Authenticated or Encrypted it is TLS.
Checked 2026-10-02
- Vendor
- Cisco
- Product
- Cisco Unified Communications Manager
- Subsystem
- SIP trunk security profile
- Deployment
- on-premises
- Region
- not restricted
- Release range
- 12.5(1)
- Checked
- 2026-10-02
Sources
- Security Guide for Cisco Unified Communications Manager, Release 12.5(1) - SIP Trunk Security Profile Setup — Cisco Systems · tier 2 current vendor documentation · Table 1 SIP Trunk Security Profile Configuration Settings, Incoming Transport Type
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting failed calls caused by large SIP messages over UDP: source note sip-fragmentation-troubleshooting-cucm-incoming-tcp-udp. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-fragmentation-troubleshooting-cucm-incoming-tcp-udp
BibTeX
@misc{warmtransfer-claim-sip-fragmentation-troubleshooting-cucm-incoming-tcp-udp,
title = {Troubleshooting failed calls caused by large SIP messages over UDP: source note sip-fragmentation-troubleshooting-cucm-incoming-tcp-udp},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-fragmentation-troubleshooting-cucm-incoming-tcp-udp},
note = {Source note sip-fragmentation-troubleshooting-cucm-incoming-tcp-udp, checked 2026-10-02}
}