AT&T System 85 manual Setting Options, SW1-1 With/Without Telephone Option

7400B and 7400B Plus Data Module

Autobaud and autoparity

Linked operation with the associated DCP voice terminal

Data metering

Data metering 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 (for 7400B Plus).

Voice Dial (for 7400B Plus)

This feature allows you to initiate voice calls from your PC using the dial command ‘‘atdp number.’’ These calls must be terminated manually, however.

Speakerphone Activation before Dialing (for 7400B Plus)

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.

Wait Time for Carrier (for 7400B Plus)

The number stored in the S7 register establishes the time the 7400B Plus data module will wait for call set up to be completed. This number can be set for any value up to a maximum of 255 seconds (with a default to 60 seconds).

Data features for host or terminal applications include:

EIA RS-232-D DCE interface

Hayes SMARTMODEM 2400 user interface emulation

Power

The stand-alone 7400B and 7400B Plus data modules operate with power from a WP91508L5 AC power converter. This is a modular AC to DC adapter that is normally plugged into a wall outlet. The data module allows phantom power to be transmitted to the attached DCP voice ter- minal even if AC power to the data module is interrupted.

Setting Options

After removal of the top access panel of the data module during installation, it is important to ver- ify that the eight option switches are set to provide the desired features.

SW1-1 With/Without Telephone Option

This switch must be set to ON for operation without an associated telephone. This switch must be set to OFF for operation with an associated telephone.

SW1-2(Not used)

SW1-3(Not used)

5-14