Specifications | 250
QV24 Quad V.24 asynchronous data interface
General
Interface ITU-T V.24/EIA/TIA RS-232E
Bandwidth allocation 8-120 kbit/s in 8 kbit/s steps (dependent on rate selected)
Control line allocation 8 kbit/s
Maximum line length 10 metres
Data clamp Mark hold when out of sync.
Control line clamp Off when loss of sync.
Clock Internally generated from 2.048 MHz system clock
(synchronized at both ends)
Async
parameters
Transparent mode Operation is completely transparent but limited to 0-600 bit/s
Standard mode data bits 7,8
Standard mode parity Transparent (enable / disable)
Standard mode stop bits 1,2
Data rates (bit/s) 300, 600, 1200, 2400, 4800, 7200, 9600, 12800, 14400,
19200, 23040, 28800, 38400, 57600 and 115200
Control
signals
End-to-end CTS-RTS, DSR-DTR
Diagnostics
Green LED RD data traffic
Yellow LED TD data traffic
HSS Single high speed synchronous data interface
General
Interfaces ITU-T V.24 EIA/TIA RS-232E
ITU-T V.35
ITU-T V.36 EIA/TIA RS-449
ITU-T X.21
EIA/TIA 530
Bandwidth allocation 8-2048 kbit/s in 8 kbit/s steps (dependent on rate selected)
8 kbit/s for control lines
Maximum line length 3 metres
Clock Internally generated from 2.048 MHz system clock
(synchronized at both ends) on DCE to DCE mode.
Clock provided by external DCE when in DTE mode.
Remote DCE outputs clock-timed by incoming clock at DTE.
Diagnostics
Top Green LED On: Normal operation
Flashing: Loopback
Lower Green LED On: Normal operation
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