Registered IP Phone with status unknown in CCM phone list.

Question

I am running CCM 6.1.1b. Recently, some registered phones show unknown status on the phone list, even though they are registered and functional. The phones show registered in the phone configuration but unknown in phone list. What causes this ?

Answer 1

Hi Pak,
Just to add a note to the great references from Jaime and Chris (+5 points for you both here :)
Here are two of the bugs;
CSCsl70392 Bug Details
Status & IP not properly associated on Find & List Phone Page
Symptom:
Under Device > Phone the Status and IP address are not properly associated with the correct devices in the list when multiple devices are listed.
Conditions:
CUCM prior to 6.1.1.2104 performing a phone search that returns multiple results.
Workaround:
View the device status on the Phone page, or narrow the search so only a single phone is displayed.
1st Found-In
6.1(1.9901.11)
Fixed-In
6.1(1.9901.52)
7.0(0.39000.33)
6.1(0.39000.19)
6.1(1.2104.1)
CSCsf02001 Bug Details
Multiple phone show unknown status/IP on Phone Device Page
Symptom:
Multiple phones show as unknown status and unknown IP on Phone Device Page even though registered and working Status
Fixed
Severity
3 - moderate
Last Modified
In Last Year
Product
Cisco Unified Communications Manager (CallManager)
Technology
1st Found-In
6.0(0.9801.148)
Hope this helps!
Rob