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V.250 AT COMMANDS

AT Commands for EV-DO-EV3 Modems

Data Set Ready (DSR) Control &S

Set command controls the RS232 DSR pin behavior.

Syntax

Command Command type

AT&S<n> Set

Parameters and Values

<n>

0 Always high.

1 Follows the data traffic channel indication.

2 High when connected.

3 High when device is ready to receive commands. Default: 3

Notes

 If option 1 is selected then DSR is tied high when the device receives from the network the data traffic

channel indication.

 In power saving mode the DSR pin is always tied low.

 If parameter is omitted, the command has the same behavior as AT&S0.

 If option 1 or 2 are active, DSR will not be tied high in case of voice channel.

Ring (RI) Control \R

Set command controls the RING output pin behavior.

Syntax

Command Command type

AT\R[<n>] Set

Parameters and Values

<n>

0 RING on during ringing and further connection.

1 RING on during ringing. Default: 1.

2 RING follows the ring signal.

Notes

 To check the ring option status use the &V command.

 If parameter is omitted, the command has the same behavior as AT\R0.

Fixed DTE Interface Rate +IPR

Set command specifies the DTE speed at which the device accepts commands during command mode operations;

it may be used to fix the DTE-DCE interface speed.

Read command returns the current value of +IPR parameter.

Test command returns the list of fixed-only <rate> values in the format:

+IPR: (list of fixed-only <rate> values)

1 2 ... 35 36 37 38 39 40 41 42 43 44 45 ... 248 249

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Multitech CDMA Guía de usuario Pagina 40