Multi-Tech Systems MT5600BL User Manual download pdf (Page 59)

4 AT Commands, S-Registers, and Result Codes

S36 decimal 0–7 7 LAPM Failure Control. Specifies the fall-

back action to take in the event of an LAPM

negotiation failure. These fallback options

are initiated immediately upon connection

if S48 is set to 128. If an invalid number is

entered, S36 acts as if the default value has

been entered. (See S48.)

0 Modem disconnects.

1 Modem stays online 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 modem connection

is established.

S37 decimal 0–12 0 Sets the maximum V.34 speed at which the

modem attempts to connect. The default

value attempts an automode connection. If

N0 is active, connection is attempted at the

most recently sensed serial port speed

(+MS= command settings are updated to

the appropriate values). If N1 is active,

connection is attempted at the highest possi-

ble speed. (+MS= settings are updated to

11,1,300,33600 to reflect V.34, automode,

300 bps minimum speed, and 33600 bps

maximum speed). Supported only for com-

patibility with existing software; use the

+MS= command instead.

S38 seconds 0–254, 255 20 Sets the delay between the modem’s receipt of

the H command to disconnect (or high-to-

low transition of DTR if the modem is pro-

grammed to follow the signal), and the

disconnect operation. Applies only to error-

correction connections. This register can be

used to ensure that data in the modem buffer

is sent before the modem disconnects. If S38

is set to a value between 0 and 254, the

modem waits for the remote modem to ac-

knowledge all data in the modem buffer

before disconnecting. If S38 is set to 255, the

modem does not time out, and continues to

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Multi-Tech Systems MT5600BL User Manual Page 59

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