Hardware manual

5901 High Speed Dialup Modem Hardware Manual

October 19, 2007

0 = Modem disconnects.

1 = Modem stays on-line and a Direct mode connection is established.

2 = Reserved.

3 = Modem stays on-line and a Normal mode connection is established.

4 = An MNP connection is attempted and if it fails, the modem disconnects.

5 = An MNP connection is attempted and if it fails, a Direct mode connection is

established.

6 = Reserved.

7 = An MNP connection is attempted and if it fails, a Normal mode connection is

established. (Default.)

Bits 3-7 Reserved

11.30 S38 - Delay Before Forced Hang Up

S38 specifies the delay between the modem's receipt of the H command to disconnect (or ON-to-

OFF transition of DTR if the modem is programmed to follow the signal), and the disconnect

operation. Applicable to error-correction connection only. This parameter can be used to ensure that

data in the modem buffer is sent before the modem disconnects.

1. If S38 is set to a value between 0 and 254, the modem will wait that number of seconds for

the remote modem to acknowledge all data in the modem buffer before disconnecting. If

time expires before all data is sent, the NO CARRIER result code will be issued to indicate

that data has been lost. If all data is transmitted prior to time-out, the response to the H0

command will be OK.

2. If S38 is set to 255, the modem does not time-out and continues to attempt to deliver data in

the buffer until the connection is lost or the data is delivered.

Range: 0-255 seconds

Default: 20

11.31 S39 - Flow Control Bit Mapped Options Status

Default: 3 (00000011b)

Bits 0-2 Status of command options

0 = No flow control

3 = RTS/CTS (&K3) (Default.)

4 = XON/XOFF (&K4)

5 = Transparent XON (&K5)

6 = Both methods (&K6)

Bits 3-7 Reserved

11.32 S40 - General Bit Mapped Options Status

S40 indicates the status of command options.