Yet another knocking head against the wall issue. We've been running phones without extensions and EM enabled so that users could log in to get their correct Lines. Came to put a 9971 into production and the phone wouldn't register. Status message on the screen was simply 'Phone not registered'.
Went through all the debugging steps. Status messages on the phone showed no obvious issues. Trust list was being updated successfully. TFTP load was happening correctly. Uploaded new firmware to the cluster and the phones pulled it down correctly. Basic network traces showed the phone booting, doing 3 dns requests, pulling config down via HTTP from the TFTP server (a few requests) and then heading off to the NTP server. We never saw any SIP requestes (port 5060).
The only thing of real note was this line in the status logs:
7301 NOT 13:25:22.214160 CVM-cfg.line1NotConfigured: [thread=configmgr MQThread][class=cip.cfg.j] sipMinCfgCheck():Line 1 not configured..
After spending a couple of hours on the phone with TAC, managed to narrow the issue down to the phone having no DN assigned. Assigned a DN and the phone registers fine.
If you hit this issue and are using EM, don't forget to update the EM logout profile on the phone, it takes precedence over the physical phone profile. If you only update the physical device record and not the Device Profile it won't register.
Hope this saves someone some time.
Would you mind tell me how to assign Dn to the phone without call manager
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