In an Expressway pair the Expressway-E in the DMZ acts as the traversal server and the Expressway-C behind the firewall acts as the traversal client.
Checked 2026-09-25
- Vendor
- Cisco
- Product
- Cisco Expressway
- Subsystem
- traversal zones
- Deployment
- on-premises
- Region
- not restricted
- Release range
- X15.3; current as of 2026-09-25
- Checked
- 2026-09-25
Sources
- Cisco Expressway Administrator Guide (X15.3) - Zones and Neighbors — Cisco · tier 2 current vendor documentation · Zones and Neighbors > Traversal Zone requirements (Traversal Client Zones / Traversal Server Zones)
Cite this note
APA
WarmTransfer. (2026, September 25). Setting up business-to-business calling on Cisco Expressway: source note expressway-b2b-setup-traversal-server-e-client-c. WarmTransfer. https://warmtransfer.net/knowledge/claims/expressway-b2b-setup-traversal-server-e-client-c
BibTeX
@misc{warmtransfer-claim-expressway-b2b-setup-traversal-server-e-client-c,
title = {Setting up business-to-business calling on Cisco Expressway: source note expressway-b2b-setup-traversal-server-e-client-c},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/expressway-b2b-setup-traversal-server-e-client-c},
note = {Source note expressway-b2b-setup-traversal-server-e-client-c, checked 2026-09-25}
}