The PTC Pulse-To-Tone Converter enables Pulse-to-Tone conversion for any auto-attendant, Voice mail System to create a complete and virtually unrestricted communication solution. Every caller has an access to a business tool that frees themselves from the limitations imposed by pulse instruments or analog type central exchanges.     ADS PTC-1000 is an independent, stand alone 2 or 4 port module attached as a front-end device to any Voice Messaging System. The system passively monitors the tip and ring providing detection of 'clicking' sounds generated by pulse phones. PTC-1000 converts these signal and inserts equivalent DTMF signals onto the line at the receiving end of the call, or to the connected host device (Voice Response Card, Audiotex System etc). PTC-1000 is completely transparent to the caller and the application. PTC-1000 detects dial pulse with simultaneous speech on the line, as required by typical interactive Voice Response Systems allowing users, familiar with Voice Systems, to enter digit selections during menus. Callers do not need to enter prefix codes. The PTC-1000 supports applications connecting to international calls by detection of widely ranging and unpredictable dial pulse characteristics.     • Totally transparent to the caller and the application. • Supports 2 or 4 lines simultaneously. • Compatibility with PBX's loop start. • Ports are activated or deactivated on per line basis via DIP switches. • Control of incoming and outgoing audio level on a per line basis. • Built in diagnostics option for monitoring analysis purpose. • Decoding of pulse using Digital Signal Processing (DSP). • Decode pulse even when the caller and/or the receiver are talking. • Automatic compensation for low level pulse. • Output flag of pulse-type communication for external accounting. • Programmable initial DTMF tone to signal a pulse-type communication. • Protection against "tip" and "ring" inversion. • Automatic Call Control (ACC). • Pulse detection over voice prompts. Selectable tone duration.       GENERAL         Dimension 19"Wx1.75"Hx12"D     Number of Channels per card 4       Number of cards per unit 2       Pulse dialing rate accepted 6.7 to 13 PPS       Normal operating conditions 10 to 40 C         0 to 70% relative humidity       LINE TO EQUIPMENT         Frequency response 330 - 3400 Hz.       Normal voice level -20 dBm       Distortion 3% (THD + Noise)       Signal-to-voice ratio 21 dB @ 1KHz.       Generated DTMF tone level -17 dB       DTMF tone duration 100 milli sec       EQUIPMENT TO LINE         Frequency response 130 3,400 Hz.     Nominal voice level -6dBm     Distortion 3% (THD + Noise)     Signal-to-voice level 34dBm @ 1 KHz     Max. Levels for 3% distortion -3dBm @ 1 KHz     Dynamic range 37 dB