Avocent Cyclades ACS User's Guide download pdf (Page 88)

Appendix E: Internal Modem

Some models of the ACS 6000 console server come equipped with an internal modem. This

modem is used to originate and answer phone calls and establish communication with other

modems to transmit data.

Controlling the modem’s functions is done by using the “AT” commands. These commands are

used to instruct the modem to perform functions such as dialing or answering calls and are

normally automatically issued by communication software. However, for some applications,

custom software may have to be written due to the absence of a normal operating system.

The modem will automatically accept and process AT commands at most standard DTE (Data

Terminal Equipment) speeds and parity settings. For each command issued, the modem will

respond with a result code to inform you of the modem’s status. The format of a basic AT

command and result code is as follows:

AT<Command><CR>

AT = Attention.

<Command> = any valid command

<CR> = Carriage Return or Enter key

OK = Result Code

Command Description

ATDT7678900<CR>

Instructs the modem to dial the number 7678900 and attempt to

connect to the remote device.

ATS0=2<CR>

Enables auto answer option. When the modem detects a ring, it will

attempt to answer after two rings.

Table E.1: Sample Command String

Command Description

ATA/ Repeat the previous command.

ATA Answer.

Table E.2: Basic AT Commands

Appendices 80

1 2 ... 83 84 85 86 87 88 89 90 91 92 93 ... 99 100

No comments

Avocent Cyclades ACS User's Guide Page 88