Zyxel-communications U-336SA Manuel d'utilisateur télécharger pdf (Page 37)

Basic Modem Operation 23

on your PC, be sure to enable the disk cache by including

SMARTDRV execution in your AUTOEXEC batch file.

Default Modem Settings for PC’s

The U-336S/SA factory settings are configured for operation with PC

type computers and communication software. In most cases, no

additional settings will be required. The following are some of the

default settings that are used for operation with PC computers and

software:

AT Command Description

E1 Echoes command characters.

&C1 Carrier detect follows remote carrier.

&D2 Modem disconnects on DTR on-to-off transition.

&K4 Use both V.42 and MNP 4 error correction, and

use both V.42bis and MNP 5 data compression.

&N0 Modem negotiates highest possible connection

speed.

ZyXEL Serial/Parallel I/O Card

For high-speed PC to modem communication, ZyXEL produces a

special I/O adapter card. This card includes a serial port and a parallel

port, each with special features, particularly when working with a

ZyXEL modem, for example:

The serial port is 16550-compatible for most communication software

usage. It has a speed of up to 460.8Kbps and data loss errors will not

occur when working with a ZyXEL modem's serial port. This solves

high-speed communication problems in Windows and other multi-

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Zyxel-communications U-336SA Manuel d'utilisateur Page 37