General Information for CUCM IP Phone Registration/Deregistration Troubleshooting

Publisher

Cisco Systems

URL

https://www.cisco.com/c/en/us/support/docs/unified-communications/unified-communications-manager-callmanager/212143-General-Information-for-CUCM-IP-Phone-Re.html

Published

2017-09-22

Updated

unknown

Accessed

2026-09-24

HTTP status

200

License

Cisco copyright; all rights reserved; no-redistribution; short excerpts and locators only

Source notes citing this source

• The registration troubleshooting technote refers to phone states Registered, Unregistered, Partially Registered, Rejected and Unknown, and notes a phone shown Unregistered on one node should be checked across nodes and RIS status. in context
• Cisco's registration troubleshooting technote states phones will not register if they use a secure device security profile without an LSC installed. in context
• The 2017 registration technote states the default Expires value in the phone's REGISTER to the primary Unified CM is 120 seconds, and that keep-alive REGISTERs to secondary servers carry Expires 0. in context

Cite this source record

APA

WarmTransfer. (2017, September 22). General Information for CUCM IP Phone Registration/Deregistration Troubleshooting. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-technote-212143-phone-registration-general

BibTeX

@misc{warmtransfer-cisco-technote-212143-phone-registration-general,
  title  = {General Information for CUCM IP Phone Registration/Deregistration Troubleshooting},
  author = {{WarmTransfer}},
  year   = {2017},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-technote-212143-phone-registration-general},
  note   = {Cisco Systems, accessed 2026-09-24}
}