Cisco's B2B technote configures the B2B traversal zone on a different port from the Unified Communications traversal zone (which uses 7001), using 7003 in its example on both Expressway-C and Expressway-E.
Checked 2026-09-25
- Vendor
- Cisco
- Product
- Cisco Expressway
- Subsystem
- traversal zones
- Deployment
- on-premises
- Region
- not restricted
- Release range
- Expressway X8.1.1 or later
- Checked
- 2026-09-25
Sources
- Configure Business to Business Audio/Video Calls through Expressway — Cisco Systems · tier 2 current vendor documentation · Configure > Expressway-C > Traversal Zone (B2B client); Expressway-E > Traversal Zone (B2B server)
Cite this note
APA
WarmTransfer. (2026, September 25). Setting up business-to-business calling on Cisco Expressway: source note expressway-b2b-setup-b2b-traversal-separate-port. WarmTransfer. https://warmtransfer.net/knowledge/claims/expressway-b2b-setup-b2b-traversal-separate-port
BibTeX
@misc{warmtransfer-claim-expressway-b2b-setup-b2b-traversal-separate-port,
title = {Setting up business-to-business calling on Cisco Expressway: source note expressway-b2b-setup-b2b-traversal-separate-port},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/expressway-b2b-setup-b2b-traversal-separate-port},
note = {Source note expressway-b2b-setup-b2b-traversal-separate-port, checked 2026-09-25}
}