Recently a local motel's phone system died do to unknown reasons. I happen to do maintenece work there and therefore was elected to install and program the new one.

Info: The owner bought a KX-TA624 phone system with a 8 extension expansion card already installed. To that 2 co's, 1 proprietary phone and 12 non-proprietary phones were attached.

In the original phone system a "master" phone was designated, so when either phone number was called that "master" phone would ring and from there it could be transfered by the owner of the motel to the correct room.

Problem: In this new system every phone rings when either phone line is called from the outside. I have been looking through the systems user manual for this type of call screening, one-phone-to-rule-them-all-type option but can't seem to find it.

Is there an option like this? If so, what is it?

(Sorry for the long post)