Specifications

TAC Access to Coprocessor
7.2 Communications Modem Description and Configuration
3/96 Application Module
X
Service 91
Honeywell Inc.
Modem
Configuration
Registers
The internal configuration registers of the U.S. Robotics Sportster 9600
modem must be properly loaded to finish the modem configuration task.
This is done by connecting a terminal to the modem and then entering the
required configuration data into the registers.
The configuration data for the U.S. Robotics 9600 modem is provided in a
table following in this section.
Once the registers are configured, the modem registers will retain the
information. This information is retained even if power is turned off and on
again.
Terminal
requirements for
setting modem
configuration
registers
The terminal used for setting the internal configuration registers of the U.S.
Robotics 9600 modem must have the following configuration
characteristics:
• Asynchronous operation
• 9600 baud rate
• 8 bits/no parity character format
Required modem
configuration
register data
The following table contains the required configuration register data to
make it support the TAC access connection.
Table 7-2 U.S. Robotics 9600 Configuration Register Data
Register Description
B0 Needed to answer above 4800
E0 Local echo off
F1 Local echo of transmitted data off (full duplex)
M1 Speaker on until carrier established
Q1 Result codes suppressed
V0 Numeric result codes
X0 Result code messages (min)
&A0 Disable additional ARQ result codes
&B1 Serial port remains fixed at last AT command
(during configuration of the modem)
&C0 CD override
&D0 Coprocessor must set DTR before modem will
accept commands
&G0 No guard tone
&H1 Hardware flow control
&I0 Flow control disabled
&K1 Auto data compression enabled
&M0 Normal mode, error control disabled