Source note · Troubleshooting Cisco IP phone registration
Activation code onboarding over MRA requires the Cisco Manufacturing root certificates in the Unified CM CallManager-trust store and outbound TCP 443 from the publisher to the Cisco cloud onboarding hosts.
Checked 2026-09-24
- Vendor
- Cisco
- Product
- Expressway
- Subsystem
- MRA onboarding
- Deployment
- on-premises
- Region
- not restricted
- Release range
- X15.0
- Checked
- 2026-09-24
Sources
- Mobile and Remote Access Through Cisco Expressway Deployment Guide (X15.0) - Onboarding MRA Devices — Cisco · tier 2 current vendor documentation · Onboarding MRA Devices > Activation code onboarding requirements
Cite this note
APA
WarmTransfer. (2026, September 24). Troubleshooting Cisco IP phone registration: source note cisco-phone-registration-troubleshooting-mra-mfg-root. WarmTransfer. https://warmtransfer.net/knowledge/claims/cisco-phone-registration-troubleshooting-mra-mfg-root
BibTeX
@misc{warmtransfer-claim-cisco-phone-registration-troubleshooting-mra-mfg-root,
title = {Troubleshooting Cisco IP phone registration: source note cisco-phone-registration-troubleshooting-mra-mfg-root},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cisco-phone-registration-troubleshooting-mra-mfg-root},
note = {Source note cisco-phone-registration-troubleshooting-mra-mfg-root, checked 2026-09-24}
}