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8400B Plus Data Module
voice call origination from your PC using the
ATDP
command (however, these
calls must be terminated manually).
Data metering which allows the data module and associated terminal to operate at higher
speeds than the far-end data point.
Supports the semicolon modifier which enables an automatic return to the command
mode after dialing a data call.
Speakerphone Activation before Dialing
For terminal dialed voice calls, you can delay speakerphone activation until after a call is
dialed. You would not hear touch tones or dial tone in this case.
Power-up self-test
Local and remote loopback tests with test duration timer
Voice terminal powered by the PBX is not affected if AC power is removed from the
8400B Plus data module.
Data features for host or terminal applications include:
EIA/RS-232-D DCE interface
Hayes SMARTMODEM 2400 user interface emulation
Power
An AT&T power supply unit is shipped with each 8400B Plus data module. This unit connects to
a grounded AC outlet, and provides a connection between the PBX wall jack and the 8400B Plus
data module. The power supply unit provides the necessary operating voltages for the 8400B
Plus data module.
Setting Options
There are 28 S-registers in the 8400B Plus data module. Twenty-two S-registers are used to
store configuration parameters; one is used to store installation options, and the remaining five
are unused. Eleven registers can be stored in nonvolatile memory, which will be restored when
the unit is powered up. There are two sets of stored registers, or profiles. When the 8400B Plus
is first powered on, the values that were last stored in the S-registers are the values in effect until
AT
commands are issued to change them.
You can check the current value stored in all S-registers with the
&V
command. To look at the
contents of just one register, use the command
Smm?
where ‘‘mm’’ is the number of the
S-register. The data module will return 3-digits, representing the decimal value of the specified
S-register.
To change the value in any one S-register directly, use the command
Smm=nnn
where ‘‘mm’’ is
the number of the S-register and ‘‘nnn’’ is the number you wish to place in the register.
For a full description of all 28 S-registers, see Appendix C in the
8400B Plus Data Module User’s
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