Tel-Entry Control Unit--N.P.B.. Used With 'No-Phone-Bill' Type Systems Only. Allows For 11-Digit Dialing
TEL-ENTRY CONTROL UNIT--N.P.B.. USED WITH 'NO-PHONE-BILL' TYPE SYSTEMS ONLY. ALLOWS FOR 11-DIGIT DIALING.
TEL-ENTRY CONTROL UNIT--N.P.B.. USED WITH 'NO-PHONE-BILL' TYPE SYSTEMS ONLY. ALLOWS FOR 11-DIGIT DIALING.