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Technical Specifications
Table A-2
lists the technical specifications of the manual and
the characteristics of the Autodialer.
Characteristic
Operating mode
Data rates
Modulation
Compatibility
Digital interface
Transmit carrier frequency
Transmitter output level
Line impedance
Line protection
Receiver dynamic range
Carrier detect hysteresis
Clamping
Line disconnect
Scrambling/descrambling of
data bits
DTE connector
MVME712A/D3
Table A-2. Technical Specifications
Full duplex on 2-wire PSTN.
Low speed: 0-300 and 600 bps asynchronous.
Medium speed: 1200 bps (+1%, -2.5%),
character asynchronous and synchronous.
High speed: 2400 bps (+1%, -2.5%),
character asynchronous and synchronous.
Low speed: Frequency Shift Keying (FSK).
Medium speed: Differentially Coherent Phase Shift
Keying (DPSK).
High speed: Quadrature Amplitude
Modulation (QAM).
WECO 103, 113, 212A, CCITT V.22, and
CCITT V.22 bis modems.
TTL/CMOS.
Originate Answer
Low Speed: Mark: 1270 Hz 2225 Hz
Medium speed:
High speed:
Permissive (-10.5 dBm +/- 1.5 dB).
600 Ohm +/- 10%, transformer coupled.
Lightning and transient protection.
-10 dBm to -45 dBm.
No less than 2 dB.
Mark hold upon loss of carrier.
Abort timer (30 seconds, adjustable).
Loss of carrier (1.4 seconds, adjustable).
DTR disconnect (80 ms after DTR is dropped).
High speed only: self synchronizing using
polynomial (1 + X-14 + X-17) per CCITT v.22.
20-pin double row header.
Technical Specifications
SpeciÞcation
Space:1070 Hz 2025 Hz
1200 Hz 2400 Hz
1200 Hz 2400 Hz
Table A-3
lists
A-3
A
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