50234.001 Walker PTT-500M-00 Push-To-Talk Unamplified Telephone Handsets The Walker PTT-500M Push-to-Talk (PTT) handsets address the need for security in environments where background conversations must not be over heard on the telephone. With a Walker PTT handset any conversation can be conducted without the worries of eavesdropping. PTT solutions are also recommended for environments with loud intermittent background noise. Transmitter Type: ET - Carbon Compatible Electret element designed into a amplified circuit to act as a Carbon without variations Output Level: -23 dBV Output Impedance: 20 Output Minimum (-20 dBV drive): 96 dBSPL Input Impedance: 150 Ohm Amplitude Limiting: 124 dBSPL Receive distortion: less than 5% Compatible with hearing aids PTT handsets do not require a hook switch in cradle G-Style / 500-Style Round Receiver & Transmitter Ends Connector: 4 conductor modular jack (RJ22) Compatible with Cortelco 2500 and 2554 series telephones Color: PTT500M Black (00)