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.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.