User`s manual

U.S. Robotics I-modem Command Reference
Analog Synchronous Applications • Page 16-4
Dial Using V.25bis Software
To make synchronous connections using V.25bis communications software, you must Þrst
conÞgure the I-modem using AT commands. Once the I-modem is conÞgured, run your
communications software, which takes control of the I-modem for the duration of the
connection.
ConÞguring the I-modem
Before you attempt to connect to a synchronous network, you must Þrst conÞgure the I-
modem using an asynchronous device, such as a terminal or a computer running standard
asynchronous communications software.
1. Find out which V.25bis protocol
, HDLC or character-oriented, is being used for dialing
and answering at the host computer and then set the I-modem to dial using it.
&M6 Dial using a character-oriented protocol that is similar to BISYNC.
The I-modem and the remote device must use the same 8-bit data format.
The character length must be 7 bits and either ODD or EVEN parity (ODD
is preferred), or 8 bits and NO parity.