Manuals / Black Box / Computer Equipment / Modem

Black Box MD885A-R3, MD885AE-R2, MD885C-R2, 34336 user manual AT D3331234

Models: MD885C-R2 MD885A-R3 MD885AE-R2 34336

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5.0 Hayes Emulation Mode

For most commands, there are parameters—numerical values used with the command specifying the function of the command. For example, the command L controls the modem’s speaker volume. L2 sets the volume to medium. The default value is a predetermined value which is in effect the first time the Modem is powered up or when a reset command is given. The possible parameters and default value for each command are shown in Table 5-1.

•A — Quick Answer. The A command immediately puts the modem into the answer mode. The modem will not execute any command entered in the command line after A.

The A command is used to transfer a call between two individuals to a communication between their computers: One person enters A while the other enters D.

•A/ — Repeat Previous Command. A/ is most commonly used to redial a busy telephone number. The AT prefix is not used with A/, and no carriage return is required. Commands are available for repetition in the command buffer only until AT is entered or power to the unit is turned off. A/ will not work following an AT or after the power has been turned off and back on.

•D — Originate Mode For Dialing. The modem dials the number that follows and attempts to go on-line. The dial command D is followed by either a telephone number to be dialed, or a string consisting of a phone number and dial command modifiers (e.g., T, P, and ; ). An example of the D command is shown below:

AT D3331234.

In response to the command above, the Modem dials the telephone number 333-1234, and then waits for a carrier tone from the remote modem (default wait time is 30 seconds). If the modem is able to establish a call, it gives a CONNECT result code, indicating that it is on-line. If it cannot connect, it issues a different result code, such as NO CARRIER, BUSY, or NO DIALTONE. The characters that can be dialed are 0 through 9, A, B, C, D, #, and *.

•AT D — the dial command without a telephone number causes the modem to pick up the telephone line without dialing a number.

•DS —Dial Stored Number. The DS command instructs the Modem to dial a telephone number or dial string previously stored using the &Z command. The syntax is DS=m, with m specifying the memory location where the dialed number will be stored. Up to ten numbers may be stored in memory locations 0-9. S=m may be placed anywhere in the dial string; for example, AT D2345S=2 dials 2345 and the number is stored in memory location 2.

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Black Box MD885A-R3, MD885AE-R2, MD885C-R2, 34336 user manual AT D3331234
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MD885C-R2, MD885A-R3, MD885AE-R2, 34336 specifications

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