16 Introduction

Features

56K data commu-

The internal modem uses the V.92 protocol to

nication

connect to host V.92 modems at data rates of

 

up to 53,000 bits per second (bps). It uses the

 

V.90 protocol to connect at data rates of up to

 

53,000 bps when connecting to a V.90 host

 

modem. For connections that do not support

 

either the V.90 or V.92 protocol, the internal

 

modem uses the ITU standard V.34 protocol

 

to connect at rates of up to 33,600 bits per

 

second. The internal modem also supports all

 

of the earlier, lower-speed ITU/CCITT

 

modem protocols.

Fax capability

You can use the internal modem to transmit

 

and receive facsimiles at rates of up to 14,400

 

bps. The internal modem supports Class 1 fax

 

transmission.

Standard com-

The internal modem is compatible with the

mands

industry standard Hayes® AT commands and

 

S-Register settings.

Error control

This feature assures accurate data transmis-

 

sion even over telephone lines subject to

 

noise interference. The internal modem uses

 

Microcom Networking Protocol® 4 (MNP4)

 

and V.42 error correction.

Data compression

Compression can greatly increase data

 

throughput. The internal modem supports the

 

new V.44 compression protocol, which is

 

optimized for World Wide Web browsing. It

 

also supports MNP5 and V.42bis data com-

 

pression protocols.

Serial port access

The internal modem frees your computer’s

 

serial port for connection of a serial mouse,

 

serial printer or other serial device.