Source note · Troubleshooting Cisco IP phone registration
Desk Phone 9800 and Video Phone 8875 on Unified CM using SIP OAuth over MRA must be onboarded with an activation code, and TFTP Encrypted Config cannot be enabled for their MRA use.
Checked 2026-09-24
- Vendor
- Cisco
- Product
- Desk Phone 9800 Series
- Subsystem
- MRA onboarding
- Deployment
- on-premises
- Region
- not restricted
- Release range
- current as of 2026-09-24
- Checked
- 2026-09-24
Sources
- Use Mobile and Remote Access (MRA) on 9800/8875 (Unified CM) — Cisco · tier 2 current vendor documentation · Use Mobile and Remote Access (MRA) on 9800/8875 > requirements and onboarding
Cite this note
APA
WarmTransfer. (2026, September 24). Troubleshooting Cisco IP phone registration: source note cisco-phone-registration-troubleshooting-9800-mra. WarmTransfer. https://warmtransfer.net/knowledge/claims/cisco-phone-registration-troubleshooting-9800-mra
BibTeX
@misc{warmtransfer-claim-cisco-phone-registration-troubleshooting-9800-mra,
title = {Troubleshooting Cisco IP phone registration: source note cisco-phone-registration-troubleshooting-9800-mra},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cisco-phone-registration-troubleshooting-9800-mra},
note = {Source note cisco-phone-registration-troubleshooting-9800-mra, checked 2026-09-24}
}