The Basic Configuration guide's toll-fraud example on Expressway-E adds a priority-40 rule (source All zones) passing 9-prefixed numbers at the local domain to the traversal zone, then a priority-41 rule (source Any) rewriting other 9-prefixed calls to do-not-route-this-call, both with Stop.
Checked 2026-09-25
- Vendor
- Cisco
- Product
- Cisco Expressway
- Subsystem
- toll fraud
- Deployment
- on-premises
- Region
- not restricted
- Release range
- X14.0
- Checked
- 2026-09-25
Sources
- Cisco Expressway-E and Expressway-C Basic Configuration Deployment Guide (X14.0) - Optional Configuration Tasks — Cisco Systems · tier 2 current vendor documentation · Optional Configuration Tasks > Task 22: Restricting access to ISDN gateways (toll-fraud prevention)
Cite this note
APA
WarmTransfer. (2026, September 25). Setting up business-to-business calling on Cisco Expressway: source note expressway-b2b-setup-toll-fraud-e-rules. WarmTransfer. https://warmtransfer.net/knowledge/claims/expressway-b2b-setup-toll-fraud-e-rules
BibTeX
@misc{warmtransfer-claim-expressway-b2b-setup-toll-fraud-e-rules,
title = {Setting up business-to-business calling on Cisco Expressway: source note expressway-b2b-setup-toll-fraud-e-rules},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/expressway-b2b-setup-toll-fraud-e-rules},
note = {Source note expressway-b2b-setup-toll-fraud-e-rules, checked 2026-09-25}
}