Source note · Troubleshooting Expressway Mobile and Remote Access
A SIP 405 Method Not Allowed with Warning 399 'SIP trunk disallows REGISTER' on MRA registration means a SIP trunk on 5060 or 5061 conflicts; move the Unified CM trunk security profile to port 5065 and target 5065 from the Expressway-C neighbor zone.
Checked 2026-10-01
- Vendor
- Cisco
- Product
- Cisco Expressway
- Subsystem
- registration
- Deployment
- on-premises
- Region
- not restricted
- Release range
- technote updated 2024-09-03
- Checked
- 2026-10-01
Sources
- Resolve Collaboration Edge Most Common Issues — Cisco Systems · tier 2 current vendor documentation · Registration Issues > SIP/2.0 405 Method Not Allowed
Cite this note
APA
WarmTransfer. (2026, October 1). Troubleshooting Expressway Mobile and Remote Access: source note expressway-mra-troubleshooting-sip-405-trunk-register. WarmTransfer. https://warmtransfer.net/knowledge/claims/expressway-mra-troubleshooting-sip-405-trunk-register
BibTeX
@misc{warmtransfer-claim-expressway-mra-troubleshooting-sip-405-trunk-register,
title = {Troubleshooting Expressway Mobile and Remote Access: source note expressway-mra-troubleshooting-sip-405-trunk-register},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/expressway-mra-troubleshooting-sip-405-trunk-register},
note = {Source note expressway-mra-troubleshooting-sip-405-trunk-register, checked 2026-10-01}
}