Source note · Troubleshooting Expressway Mobile and Remote Access
Calls that connect over MRA with no audio are traced to static NAT not set on Expressway-E (System > Network Interfaces > IP); blocked media ports in the firewall; or a single-NIC deployment without NAT reflection.
Checked 2026-10-01
- Vendor
- Cisco
- Product
- Cisco Expressway
- Subsystem
- media-nat
- Deployment
- on-premises
- Region
- not restricted
- Release range
- technote updated 2024-09-03
- Checked
- 2026-10-01
Sources
- Resolve Collaboration Edge Most Common Issues — Cisco Systems · tier 2 current vendor documentation · Call-Related Issues > No Media over MRA
Cite this note
APA
WarmTransfer. (2026, October 1). Troubleshooting Expressway Mobile and Remote Access: source note expressway-mra-troubleshooting-no-media-static-nat. WarmTransfer. https://warmtransfer.net/knowledge/claims/expressway-mra-troubleshooting-no-media-static-nat
BibTeX
@misc{warmtransfer-claim-expressway-mra-troubleshooting-no-media-static-nat,
title = {Troubleshooting Expressway Mobile and Remote Access: source note expressway-mra-troubleshooting-no-media-static-nat},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/expressway-mra-troubleshooting-no-media-static-nat},
note = {Source note expressway-mra-troubleshooting-no-media-static-nat, checked 2026-10-01}
}