There is no special parameter that I am aware of which would enable/disable the ability to report on unregistered phones. Are you getting an error message or just an empty table? If you were expecting more devices to be listed then you may be running into a common problem. A device is only reported as unregistered if it, at one time, held a status of registered. This could mean a few things. The most common reason is that a device was configured but never seen on the network. The second most common is that a device that was once unregistered, never re-registered, and the record status has timed out or the phone was reset (from CCMAdmin, BAT, etc.).
To test, you can take a registered phone and disconnect it from the network. Give RIS a minute or so to propagate the data and then run the unregistered query again.
Now, this won't solve the problem if you really just want to see all devices that are not registered (whether they be "unregistered", etc.). From RTMT you can query on devices that are only configured in the database. You may also need to query on rejected or partially registered status as well. Personally, I use a tool I developed to get this information so I may be out of touch with recent updates to RTMT capabilities.
SIP traces provide key information in troubleshooting SIP Trunks, SIP
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Please find the attached HTML document, download and open it on your PC.
This provides an easy to use form where you simply answer a few
questions and it will render the proper jabber-config.xml file for you
to copy/paste. There is built in logic to verif...
CUCM Database Replication is an area in which Cisco customers and
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involving TAC. This document discusses the bas...