ET-501 (430-0805) Specifications Faxback Doc. # 7273 Redial Capacity.............................Up to 31 digits for Tone mode, 32 digits for Pulse mode. Power Requirements..............................................Phone Line Connector.................U.S.O.C. Type RJ11C (or RJ11W for wall mounting) Dialing Rate...............................10 Pulses Per Sec. (Pulse Mode) Make/Break Ratio.................................................40% / 60% Inter-Digit Period........................................800 Milliseconds Touch-Tone Dialing...........................................Standard DTMF Interface.......................................................Loop Start Ringer Type...................................Standard Bridged Ring Signal Signal Type...................................20-28 Hz Sine or Square Wave Ring Voltage.................................................40-130 Volts. (br/all-8/3/94)