Intel 537EX manual +Fmfr?, +Fmdl?, +Frev?

Data Mode AT COMMANDS

3.4Modem Identification Commands [In, +FMI, +FMR, +FMM, +GMI, +GMM, +GMR, +GSN,

+FMFR?, +FMDL?, +FREV?]

The modem provides product identification AT commands that help determine the modem’s manufacturer, model number, and product revision. To provide flexibility with older software application programs, the modem supports several commands that can be used to request a single item of identification (such as a modem model number). Table 15 lists the commands used to obtain product information (all identification commands are usable in data, fax, or voice mode).

Table 15. Product Identification Information

		AT Commands
Product Information	ATIn Command	Data Mode	Class 1 Fax Mode	Legacy Modems
Modem Manufacturer	ATI2	AT+GMI	AT+FMI	AT+FMFR?
Model ID	ATI1	AT+GMM	AT+FMM	AT+FMDL?
Revision Number	ATI4	AT+GMR	AT+FMR	AT+FREV?
Example:
ATI1	Causes the modem to send the modem’s name to the DTE.

Intel 536EP Response to the modem name request.

V.92 Modem

3.5Establishing a Modem Connection [A, D, DS = n, S0]

Data mode provides several methods for establishing a connection with a remote modem. For each modem, a connection can be initiated manually or automatically in both answer and originate modes. A manual-to-manual connection is useful when both modems (that are on-hook) are connected to an off-hook telephone line. For example, if two people are talking on the telephone, they can manually establish a modem connection without first hanging up. When establishing a manual connection, one modem must be designated as the originating modem and the other as the answering modem. Manual originate mode is initiated by sending an ATD to the DCE. Manual answer mode is accomplished by sending an ATA to the DCE.

Automatic originate mode is initiated by sending an ATD <telephone number & dial modifiers> or ATDS=m to the DCE. Automatic-answer mode is accomplished by setting S-register S0 to a non-zero value. S1 keeps track of how many ring signals are detected. If the content of S0 is non- zero and the number of ring signals (as defined by S0) are detected (that is, S1 = S0), then the DCE goes off-hook and attempts to connect to the remote modem (with the following exceptions):

•The time period between the ring signals is greater than 8 seconds, which causes the S1 counter to reset and thus never reach the value for S0.

•Caller ID is enabled and S0=1, the modem answers on the second ring signal instead of the first ring signal. This happens because Caller ID puts a signal on the telephone line between the first and second ring signal.

Example:

536EX Chipset Developer’s Manual 29

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