Eicon Networks C21 Installationsanleitung PDF herunterladen (Seite 89)

ECDIALER and ISDN 89

If the AT commands given above are not compatible with your modem, you

should determine, from your modem’s operating guide, the equivalent

commands used to control the following parameters:

The Request-To-Send/Clear-To-Send (RTS/CTS) delay interval value may

also need to be adjusted. This value determines the delay time a modem uses

before turning on CTS after detecting an OFF-to-ON transition on RTS.

The RTS/CTS delay interval can be adjusted by adjusting the modem’s S26

AT command:

ATS26=x

where x is the value of the delay interval in increments of 10 ms.

If you do not own a Hayes compatible modem, consult your modem’s operating

guide for directions on how to adjust the interval between detection of the

Request-To-Send mode and enabling of the Clear-To-Send signal.

Sample Script

The ECDIALER script does three things:

• Initializes the Eiconcard for communications with the modem. This is done

with the SET_PORT, SET_DATA_BIT, SET_SPEED, and finally the

OPEN_COMM commands.

• Programs the modem.

• Calls the DATAPAC online service from Montreal. This is done with the

Type “ATDT8614750” command. When a connection is established, the

modem answers with a “CONNECT 2400” string.

Parameter Settings Required

DTR on/off The Data Terminal Ready signal will be turned off to cause the

modem to hang up. The modem should interpret DTR this way.

DSR on/off The Data Set Ready signal is used to detect a connection. It should

be turned on only when data is ready to be sent (modem negotiation

complete).

Sync/Async mode The modem must operate in asynchronous mode while in an off-line

command state. It must operate in synchronous mode from the time

the connection is fully established until the on-line data-transfer state

is terminated.

1 2 ... 84 85 86 87 88 89 90 91 92 93 94 ... 214 215

Keine Kommentare

Eicon Networks C21 Installationsanleitung Seite 89