Source note · Troubleshooting Cisco IP phone registration
For MRA, public external DNS must hold _collab-edge._tls.<domain> SRV records so endpoints can discover the Expressway-E.
Checked 2026-09-24
- Vendor
- Cisco
- Product
- Expressway
- Subsystem
- MRA DNS
- Deployment
- on-premises
- Region
- not restricted
- Release range
- X15.2
- Checked
- 2026-09-24
Sources
- Mobile and Remote Access Through Cisco Expressway Deployment Guide (X15.2) - MRA Requirements and Prerequisites — Cisco Systems · tier 2 current vendor documentation · MRA Requirements and Prerequisites > DNS records
Cite this note
APA
WarmTransfer. (2026, September 24). Troubleshooting Cisco IP phone registration: source note cisco-phone-registration-troubleshooting-mra-srv. WarmTransfer. https://warmtransfer.net/knowledge/claims/cisco-phone-registration-troubleshooting-mra-srv
BibTeX
@misc{warmtransfer-claim-cisco-phone-registration-troubleshooting-mra-srv,
title = {Troubleshooting Cisco IP phone registration: source note cisco-phone-registration-troubleshooting-mra-srv},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cisco-phone-registration-troubleshooting-mra-srv},
note = {Source note cisco-phone-registration-troubleshooting-mra-srv, checked 2026-09-24}
}