The Tel-A-Greeter™ Model 251 and 252 are advanced-technology digital call screening and messaging systems designed to answer calls with an informative greeting, then let callers ring through for live pickup, select other pre-recorded messages or hang-up. Available in two models the Tel-A-Greeter 251 is a single-line unit capable of handling a single incoming call while the 252 is a two-line unit capable of handling two calls simultaneously.

Message recording and system programming functions are accessed locally or remotely using a standard touch-tone telephone. A total of eleven separate messages can be recorded into each unit, these messages include eight menu messages, one day and one night greeting message, and one music-on-hold message. The music-on-hold message slot plays when a call is being transferred to local phone. The Tel-A-Greeter 251 and 252 both have a Call-Screening option that allows callers to bypass the greeting message and ring through if they have the correct password.