I know/think the ATAs provided by voipo are locked and that support updates them remotely. I haven't used my ATA (and it is no longer powered up and attached) since I provisioned my IP phone.

Is there any need (or benefit) to keep it on my LAN if I have no plans to use an analog handset?

If not, can/should the ATA be returned to voipo and would the return be processed in such a way that my account wouldn't be closed?