Caller ID System 40 (430-0961) Specifications Faxback Doc. # 9789 Ringer Equivalency Number (REN).......................................0.5B Effective Impedance of 1.0 REN....................................8000 ohm Effective Impedance of 0.5 REN...................................16000 ohm Facility Interface Code (FIC)...................................Loop Start Service Order Code (SOC)..............................................RJ11 Specifications are typical, individual units might vary. Specifications are subject to change without notice. (IR/all-02/23/95)