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DIGITAL TAPE UNIT (DTU)
The Digital Tape Unit (Figure 2-21 ) is a RS-232 device used to record administration
translations.
The DTU does not encode the translations data as it records, nor does it
require decoding circuitry when playing back (restoring) recorded data. Data is recorded
and transmitted at 1200 bps.
The DTU requires 115V commercial power from a 3-wire grounded outlet. It should be
located on a desk or table top. The recorder is approximately 5 inches wide, 2 inches high,
and 10 inches long.
As shown in Figure 2-22, the DTU must be directly connected to port #3 on the Call
Processor (ZTN82 or ZTN128) CP. Remote and switched connections are not supported.
Maximum cabling distances are provided in Section 5, “Technical Specifications.”
115V AC
POWER
CABLE
EIA
RS-232C
CONNECTOR
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3-WAY POWER
DIGITAL RESET
COUNTER
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RECORD
PLAY REWIND F FWD STOP/EJECT PAUSE
o
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X
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(TOP VIEW)
Figure 2-21. Digital Tape Unit
2-120