Multi-Tech Systems ISIHP-4SD, ISIHP-4U manual Terminal Adapter AT Commands, Entering AT Commands

AT Commands and S-Registers

57CONNECT 26400

58CONNECT 28800

59CONNECT 31200

60CONNECT 33600

CONNECT 45000

CONNECT 56000

EC is replaced by one of the following codes, depending on the type of error control connection:

Code	Error Correction
V42bis	LAP-M V.42 error control and V.42bis data compression
V42	LAP-M V.42 error control only
MNP5	MNP4 error control and MNP 5 data compression
MNP4	MNP 4 error control only
NoEC	No error control protocol

Terminal Adapter AT Commands

One of the ways you can communicate with and configure your terminal adapter (TA) is to use AT commands. AT commands are so-called because, with only a few exceptions, each command string begins with the characters AT. Using AT commands, you can read and set parameters and perform actions such as dialing.

Entering AT Commands

You can send AT commands to the TA by typing them on the keyboard, by typing them in the terminal window of a data communications program such as HyperTerminal, or indirectly by configuring your data communications program.

Enter AT commands in the following format: AT <command string> <cr>. The AT characters cause the TA to interpret the following string of characters as a command. The command string consists of one or more commands. The carriage return character, <cr>, sends the command string to the TA. If you are entering a command string in your communication program’s terminal window, insert the carriage return character by pressing

104 MultiModemISI Hybrid Series, ISIHP-2S/2U/4S/4U/4SD