ZyXEL ACCESSING INTERNET & INTRANET omni series Instrukcja Użytkownika Pobierz pdf (Strona 37)

ISDN Communication Basics 25

5 ISDN Communication

Basics

In this chapter, we will cover how to initiate and receive calls over

digital lines using your TA.

Understanding AT Commands

AT commands are used to configure and control the omni. Command

statements are usually sent to the TA by being typed from the

computer keyboard.

Command statements must be written in a specific form in order for

the TA to recognize them. A command statement begins with the

letters “AT” or “at”. It is then followed by one or more commands

and then by <Enter>.

AT commands can only be issued when the TA is in “command” or

“off-line” mode.

Once the TA has established a connection with the remote device, it

goes into “on-line” mode, and the characters sent from your

computer (through the TA) are transmitted to the remote device.

In order to issue an AT command statement, you first need to run

your communications software and configure it to the port connected

to the TA. Refer to your communications software manual if this is

not the case.

Once the communication terminal program is running and the TA is

connected:

Type:

AT<Enter>

TA responds:

1 2 ... 32 33 34 35 36 37 38 39 40 41 42 ... 167 168

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ZyXEL ACCESSING INTERNET & INTRANET omni series Instrukcja Użytkownika Strona 37