ZETRON 640 DAPT XTRA, Installation And Repair Manual

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Specifications
025-9416 11
TELEPHONE INTERFACES
Number of Interfaces 2 (expandable to 4)
Line Types Each telco trunk field-configurable for any one of:
•
End-to-End (typical “home” type line)
•
DID (Dedicated Inbound Dialing); immediate start or wink
start protocol
•
PABX E&M Tie Trunk Type I (2-Wire Hybrid audio)
Input Signaling DTMF or Pulse Feed Digits
Optional MF type 2A decoder
Optional Dial Click decoder
Line Coupling
600
Ω
transformer, adjustable balance duplex hybrid
Connector Male 50-pin connector similar to RJ2GX
TRANSMITTER INTERFACE
Transmit Audio
Balanced 600
Ω
transformer
250-3500 Hz
±
1dB
Selectable flat tone or –6 dB per octave de-emphasis
Selectable flat voice or +6 dB per octave pre-emphasis
Receive Audio
Balanced 600
Ω
transformer
Adjustable level -20 to +10 dBm
Selectable flat tone or –6 dB per octave de-emphasis
Format Encoding
Analog frequency accuracy
±
.02%
Analog tone distortion < 0.2%
Digital data stability
±
2 ppm
Control Relays Analog PTT
Digital PTT
Auxiliary PTT
Digital Data RS-232C compatible
Null modem cable
Field-programmable polarity and timing
CAS / COR Input Selectable polarity, TTL or contact closure
Transmitter Request RS-232C
Transmitter Busy Selectable Polarity, TTL or contact closure
Station ID Field-programmable, 1200 Hz CW Morse Code at 20 WPM