I'm trying to determine the 'registered' state of all phone lines of a given Call Manager, but I'm seeing different behaviour from "SelectCmDevice" when it is invoked on a CUCM 6 (6.1.2.1000-13) compared to running against CUCM 5 or CUCM 7.  In particular, if a phone has multiple lines, the call on CUCM 5 and CUCM 7 returns all of the lines with their associated status under "DirNumber".  Example output from CUCM 7 (editted to only include the first few fields from device in question):
 
<item xsi:type="ns1:CmDevice">
  <Name xsi:type="xsd:string">SEP00152BB5D5F5</Name>
  <IpAddress xsi:type="xsd:string">******</IpAddress>
  <DirNumber xsi:type="xsd:string">2450-Registered,2470-Registered</DirNumber>
  <Class xsi:type="ns1: DeviceClass">Phone</Class>
  ...
</item>
 
But on CUCM 6, the "DirNumber" field only lists the information for line 1.  Ex (editted again):
 
<item xsi:type="ns1:CmDevice">
  <Name xsi:type="xsd:string">SEP000BFD07C71C</Name>
  <IpAddress xsi:type="xsd:string">******</IpAddress>
  <DirNumber xsi:type="xsd:string">2610-Registered</DirNumber>
  <Class xsi:type="ns1: DeviceClass">Phone</Class>
  ...
</item>

I have tried changing the "SelectCmDevice" query to select based on DirNumber rather than Name, but this still does not locate the second line.   I have seen this behaviour from multiple instances of CUCM 6.  Any thoughts on why CUCM 6 is behaving differently, and/or advice on how to query the registered status of secondary lines would be appreciated. 
 

Thanks for the reply.  Unfortunately, in all 3 of my test cases (CUCM 5, CUCM 6, CUCM 7), the device protocol is SCCP.  
 
I can use the device's status for each associated line if I have to - I'm just trying to figure out why there is a difference in the behaviour.

Thanks again.  The behavior you are seeing matches what I was seeing - I also got back the information for both lines in the output from CUCM7.   It was only from CUCM6 where the output only contained a single line.
 
I tried the CLI commands you suggested, and I found that the behavior again is different between CUCM6 and CUCM7.  On CUCM6, I get back 6 phones from the 'query phone' command, and 6 extensions from the 'query phoneextn' command.  
 
admin:show risdb query phone
----------- Phone Information -----------
#TotalPhones, #TotalRegistered, #RegisteredSCCP, #RegisteredSIP, #UnRegistered, #Rejected, #PartiallyRegistered, StateId
6, 6, 6, 0, 0, 0, 0, 414
 
admin:show risdb query phoneextn
----------- Phone Extension Information -----------
#extensions, #registered, #unregistered, #rejected, StateId
6, 0, 0, 0, 216
 
 
But on CUCM7, I get back 3 phones from the 'query phone' command and 4 extensions from the 'query phoneextn' command. 
 
admin:show risdb query phone
----------- Phone Information -----------
#TotalPhones, #TotalRegistered, #RegisteredSCCP, #RegisteredSIP, #UnRegistered,#Rejected, #PartiallyRegistered, StateId
3, 3, 3, 0, 0, 0, 0, 36
 
admin:show risdb query phoneextn
----------- Phone Extension Information -----------
#extensions, #registered, #unregistered, #rejected, StateId
4, 0, 0, 0, 20