Digicom COMSPHERE 3911 Benutzerhandbuch

3910-A2-GN32-40

September 1998

CTS Control:  Stndrd_RS232
Nxt   Stndrd_RS232   Forced_On   WinkWhenDisc   Follows_DTR   Follows_RTS40

Clear-to-Send Control. CTS is a signal from the modem to the DTE indicating that it can accept data from
the DTE.

H

Standard RS232

In Synchronous mode, forces the state of CTS to follow the state of RTS in normal EIA-232-D
operation. The minimum time that elapses between CTS and RTS is determined by the RTS/CTS
Delay configuration option. Use this setting for most synchronous applications. In AT Command
mode, CTS goes low just prior to DSR going active and goes high when the modem enters Data
mode. This operation prevents losing data in applications which begin transmitting as soon as
DSR and CTS are both active.

H

Forced On

CTS is forced ON at all times. Use this selection for most asynchronous applications.

H

Wink When Disconnect

CTS is normally forced ON, but is turned OFF for 1 to 2 seconds upon a disconnect. Use this for
most UNIX applications.

H

Follows DTR

The state of CTS follows the state of DTR. When DTR turns ON, CTS turns ON. When DTR turns
OFF, CTS turns OFF.

H

Follows RTS

The state of CTS follows the state of RTS. When RTS turns ON, CTS turns ON. When RTS turns
OFF, CTS turns OFF.

NOTE: When CTS flow control or CTS/RTS flow control is enabled, CTS will turn ON and OFF regardless

of the setting of CTS Control.

The AT command for Forced On is \D0.
The AT command for Standard RS232 is \D1.
The AT command for Wink When Disconnect is \D2.
The AT command for Follows DTR is \D3.
The AT command for Follows RTS is \D4.

RTS/CTS Delay:  0msec
Nxt   0msec   10msec   50msec   150msec   600msec

Request-to-Send/Clear-to-Send Delay. RTS/CTS Delay sets the delay time between the modem receiving
RTS from the DTE and the modem sending CTS to the DTE.

NOTE: This delay is only valid in Async Direct mode and synchronous applications when it is necessary to

have a short delay between the time the DTE raises RTS and the time the modem presents CTS to
allow the DTE to send data.

NOTE: For this configuration option to be valid, both the RTS Action and the CTS Control configuration

options must be set to Stndrd RS232. If RTS Action is set to Ignore, RTS is always ON and this
configuration option has no effect.

The AT command is S-Register S26=n, where n is a value from 0 to 255 in 10 millisecond increments.