Motorola and V.32bis 用户手册

3-10 Getting Started

In addition to the configuration and operation methods in this chapter, the modem 
supports other methods to establish and manage telephone connections:

• V.25bis ACU (for synchronous or asynchronous applications)

• NetView LPDA-2 ACU (for synchronous applications)

• IBM AS 400 (for synchronous dialing)

• External Auto-Call Units such as the Bell 801C

These methods are described in the sections that follow.

The modem supports an ITU-TS V.25bis ACU for initiating calls from an intelligent 
terminal, in synchronous or asynchronous formats, which supports:

• Addressed mode, to perform call-related tasks, such as storing phone numbers 

in memory, dialing calls from memory, connecting/disregarding incoming calls

• Manual and direct call establishment methods. Direct mode lets you use DTR 

transitions from the DTE to establish calls. Manual mode lets you manually 
initiate and answer calls with a telephone and then transfer the call to the 
modem.

For more information on the V.25bis ACU, refer to Chapter 3, Automatic Calling 
Interfaces, in the 326X Series Modem Reference Guide. Programmers and System 
Developers should also refer to Chapter 3 for a programming guide describing 
asynchronous and synchronous data formats using the ASCII/EBCDIC character 
sets.

The modem supports Link Problem Determination Aid (LPDA-2). LPDA-2 is the 
communications protocol between IBM host software and transmission devices for 
exchanging diagnostic and control information. LPDA-2 commands provide a means 
for an attached terminal to command the modem to dial a telephone number and 
report back if the call is successful or not successful.

For more information on using the LPDA-2 ACU, refer to Chapter 3, Automatic 
Calling Interfaces, in the 326X Series Modem Reference Guide for configuration 
information and for information on NetView’s LPDA-2 dialing commands.