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Specifications
VJ
Performance
Operation
Modes
Data Rate
Low
Speed
High
Speed
Data Format
Line Requirements
Line
Signal
Low
Speed
High
Speed
Line
Impedance
Modem
Capability
Low
Speed
High
Speed
Tandy
protocol
Hayes
protocol
Full
or half duplex,
all
speeds
Automatic
answer/originate
Manual
answer/originate
300 bps
1200 bps
Serial,
binary,
asynchronous
Data
bit:
7 with
1
or 2 stop
bits;
odd,
even,
or
fixed parity
8
with
1
or
2
stop
bits;
no
parity
2-wire
dial line
Frequency
shift
keying
(FSK)
Differential
phase
shift
keying
(DPSK)
600
ohms
Bell
System
103,
300
baud
FSK
switched-network
modems
Bell
System
212A
85
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