I am interested in using the Caller ID functionality of your MT5634ZBA modems. Can the modem be programmed with a list of phone numbers whereby if an incoming call is not from one of these numbers the modem either will not answer or not connect?

Sorry, these modems do not have the capability of comparing incoming call numbers to stored numbers. This kind of action would need to be performed in the DTE equipment attached to the modem. However, the MT5634ZBA can be configured so that the caller will need a password in order for the call to be accepted.