Multi-Tech Systems MT2456SMI22 manual Short Form Long Form Value in ATXn Command, Rlsd Option

Chapter 4 - V.22bis Commands

Short Form	Long Form		n Value in ATXn Command
		0	1	2	3	4
42	CARRIER 75/1200	X	X	X	X	X
46	CARRIER 1200	X	X	X	X	X
47	CARRIER 2400	X	X	X	X	X
67	PROTOCOL: V42	X	X	X	X	X
70	PROTOCOL: NONE	X	X	X	X	X
83	LINE IN USE	X	X	X	X	X
85	OFF-HOOK INTRUSION	X	X	X	X	X
86	LINE REVERSAL DETECTED	X	X	X	X	X
87	NO LINE	X	X	X	X	X

Note:

An 'x' in a column indicates that the message (either the long form if verbose, or the value only for short form) will be generated when that particular value of 'n' (shown at the top of the column) has been selected by the use of ATXn. If the column is blank, then no message will be generated for that x option. A numeral indicates which less explicit message (verbose or short form) will be output for that X option.

&C RLSD Option

The modem controls the RLSD output in accordance with the parameter supplied. The parameter value, if valid, is written to S21 bit 5.

Syntax &C<value>

Defined Values

<value> Decimal number corresponding to the selected option.

0RLSD remains ON at all times.

1RLSD follows the state of the carrier. (Default)

Result Codes OK 0 or 1

	ERROR Otherwise
&D	DTR Option

This command interprets the ON to OFF transition of the DTR signal from the DTE in accordance with the parameter supplied. The parameter value, if valid, is written to S21 bits 3 and 4. Also, see S25.

Syntax &D<value>

Defined Values

<value> Decimal number corresponding to the selected option.

0DTR drop is interpreted according to the current &Qn setting as follows:

&Q0, &Q5, &Q6: DTR is ignored (assumed ON). Allows operation with DTEs, which do not provide DTR.

&Q1: DTR drop causes the modem to hang up. Auto-answer is not affected.

&Q2, &Q3: DTR drop causes the modem to hang up. Auto-answer is inhibited.

1DTR drop is interpreted according to the current &Qn setting as follows:

&Q0, &Q1, &Q5, &Q6: DTR drop is interpreted by the modem as if the asynchronous escape sequence had been entered. The modem returns to asynchronous command state without disconnecting.

&Q2, &Q3: DTR drop causes the modem to hang up. Auto-answer is inhibited.

2DTR drop is interpreted according to the current &Qn setting as follows:

&Q0 through &Q6: DTR drop causes the modem to hang up. Auto-answer is inhibited. (Default)

3DTR drop is interpreted according to the current &Qn setting as follows:

&Q0, &Q1, &Q5, &Q6: DTR drop causes the modem to perform a soft reset as if the Z command were received.

&Q2, &Q3: DTR drop causes the modem to hang up. Auto-answer is inhibited.

&K Flow Control

This command defines the DTE/DCE (terminal/modem) flow control mechanism. The parameter value, if valid, is written to S39 bits 0, 1, and 2.

Syntax &K<value>

Defined Values

<value> Decimal number corresponding to the selected option. 0 Disables flow control.

3Enables RTS/CTS flow control. (Default for data modem modes.)

4Enables XON/XOFF flow control.

5Enables transparent XON/XOFF flow control.

Result Codes OK <value> = 0, 3, 4, or 5

ERROR Otherwise

Multi-Tech Systems, Inc. MT2456SMI-22 SocketModem Developer’s Guide 17