IBM ThinkPad 755CX, Manual

Page: 103 / 296

Using the Mwave DSP Telephony Features
Modem 14400
Mwave Data Modem
The Mwave telephony features support direct attachment to the
public switched telephone network. The Mwave data modem
supports the standard COM port interface and can be used with the
communication application programs that use the Hayes
**
AT
command set.
The Mwave data modem provides the following features:
Standard asynchronous COM port interface (NS16550A UART
compatible) operation
Bell
**
–103/212A, CCITT–V.21/V.22, V.22bis protocols with data
from 50 to 2400 bps
CCITT–V.32 protocols with data rates of 4800, 9600 uncoded,
and 9600 bps Trellis coded (optional)
CCITT–V.32bis protocols with data rates of 4800, 7200, 9600,
12 000, and 14 400 bps (optional)
Hayes AT command set compatibility
Call progress monitor
Automatic dialing
Dual-tone modulation frequency (DTMF) and Pulse dialing
Asynchronous error-recovery protocol
Error correction via MicroCom
**
Network Protocol (MNP
**
)
classes 1–4
MNP class 5 for up to 2x data compression
Functional upgrades via software
CCITT V.42bis for up to 4x data compression
Chapter 3. Operating Your Computer
87