When the same Expressway and Unified CM serve both MRA and B2B, the SIP port on the Unified CM trunk used for B2B must be changed from the default 5060 or 5061.
Checked 2026-09-25
- Vendor
- Cisco
- Product
- Cisco Unified CM with Cisco Expressway
- Subsystem
- SIP trunk
- Deployment
- on-premises
- Region
- not restricted
- Release range
- Collaboration 14
- Checked
- 2026-09-25
Sources
- Preferred Architecture for Cisco Collaboration 14 Enterprise On-Premises Deployments, CVD - Collaboration Edge — Cisco · tier 2 current vendor documentation · Collaboration Edge > SIP trunk between Unified CM and Expressway-C
Cite this note
APA
WarmTransfer. (2026, September 25). Setting up business-to-business calling on Cisco Expressway: source note expressway-b2b-setup-cucm-trunk-port-mra. WarmTransfer. https://warmtransfer.net/knowledge/claims/expressway-b2b-setup-cucm-trunk-port-mra
BibTeX
@misc{warmtransfer-claim-expressway-b2b-setup-cucm-trunk-port-mra,
title = {Setting up business-to-business calling on Cisco Expressway: source note expressway-b2b-setup-cucm-trunk-port-mra},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/expressway-b2b-setup-cucm-trunk-port-mra},
note = {Source note expressway-b2b-setup-cucm-trunk-port-mra, checked 2026-09-25}
}