Hi Jeff,
Even in the latest 7.0(3b) CER release, VG224 devices must be manually added;
Phones that you can manually define or track using IP subnet
•Analog phones, for example, phones connected to VG 224/248 and ATA devices
•Generic H.323 endpoints. Supported H.323 phones include Microsoft NetMeeting and video-enabled H.323 endpoints
These phones are only supported if their calls are routed by Cisco Unified Communications Manager.
Note Phones behind analog gateways must be added as manual phones even if a subnet is configured using Cisco ER where the gateway IP address is in that subnet. Phones behind Analog Telephony Adapters (ATAs) are not added as manual phones; they may show as unlocated phones if they are not located behind a switch port.
http://www.ciscoexpert.info/en/US/docs/voice_ip_comm/cer/7_0/english/release/notes/cer_703.html
Cheers!
Rob
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