Multi-Tech Systems MT2456SMI22 manual Enable/Disable Line Quality Monitor and Auto-Retrain

Chapter 4 - V.22bis Commands

%E Enable/Disable Line Quality Monitor and Auto-Retrain

Controls whether or not the modem will automatically monitor the line quality and request a retrain (%E1). The parameter value, if valid, is written to S41 bits 2 and 6. If enabled, the modem attempts to retrain for a maximum of 30 seconds.

Syntax %E<value>

Defined Values

<value> Decimal number corresponding to the selected option.

0Disable line quality monitor and auto-retrain.

1Enable line quality monitor and auto-retrain. (Default)

Result Codes

OK <value> = 0 or 2. ERROR Otherwise.

B ITU-T or Bell

When the modem is configured to allow either option, the modem will select Bell or ITUT modulation for a line speed connection of 300 or 1200 bps. Any other line speed will use an ITU-T modulation standard. The parameter value, if valid, is written to S27 bit 6..

Syntax

B<value>

Defined Values

<value> Decimal number corresponding to the selected option.

0Selects ITU-T operation at 300 or 1200 bps during Call Establishment and a subsequent connection. (Default)

1Selects Bell operation at 300 or 1200 bps during Call Establishment and a subsequent connection.

2Selects V.23 half-duplex operation at 1200 bps during Call Establishment and a subsequent connection.

3Disables V.23 half-duplex operation.

Result Codes

OK <value> = 0 or 3

ERROR Otherwise

Multi-Tech Systems, Inc. MT2456SMI-22 SocketModem Developer’s Guide 28