Source note · Expressway business-to-business calling
Cisco's B2B technote uses a traversal zone separate from the Unified Communications (MRA) traversal zone, on a different port such as 7003 rather than 7001.
Checked 2026-09-25
- Vendor
- Cisco
- Product
- Cisco Expressway
- Subsystem
- firewall traversal
- Deployment
- on-premises
- Region
- not restricted
- Release range
- X8.1.1 and later
- Checked
- 2026-09-25
Sources
- Configure Business to Business Audio/Video Calls through Expressway — Cisco Systems · tier 2 current vendor documentation · Configure: traversal zone for B2B
Cite this note
APA
WarmTransfer. (2026, September 25). Expressway business-to-business calling: source note expressway-b2b-calling-separate-b2b-traversal. WarmTransfer. https://warmtransfer.net/knowledge/claims/expressway-b2b-calling-separate-b2b-traversal
BibTeX
@misc{warmtransfer-claim-expressway-b2b-calling-separate-b2b-traversal,
title = {Expressway business-to-business calling: source note expressway-b2b-calling-separate-b2b-traversal},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/expressway-b2b-calling-separate-b2b-traversal},
note = {Source note expressway-b2b-calling-separate-b2b-traversal, checked 2026-09-25}
}