What do I need in terms of a plug in or module to get the time working on a 616 system. It only displays one time and date and never changes. Also what do I do to get it to support caller ID?

For the DATE and TIME to work you need a RCU module. The people here at Sundance can probably get you one. Caller ID is not supported on this system.

Checked with sundance and they don't have one, try https://www.usedphones.com