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Microsoft Windows Logo Program System and Device Requirements  —  117

+CMGR: Read Messages

+CMGS: Send Messages

+CMGW: Write Messages

+CNMI: New Message Indications  to terminal equipment (TE)

+CRES: Restore Settings

+CSAS: Save Settings

+CSCA: Service Center Address

+CSCS: TE character set selection

+CSMS: Select Messaging Service

Unlike wireline data modems, these devices are not required to support V.34 signaling because none is available. Only 9600 bps capability is required.;

B6. V.90 connectivity, V.42 Link Access Protocol, Modem (LAPM), V.42 bis.

B6. Data modem must support the following protocols:

Establish and maintain connections according to V.90 Specification is required

Server: The modem must also support V.34 modulation

B6. If the following capabilities are implemented, support must comply with the related specification:

V.42 Link Access Protocol Modem error control

V.42 bis data compression

B6. Connection to two distinct V.90 host modems (such as 3Com and Conexant) at 40 Kbps or better.
B6. If modem supports call control, media detection uses V.251.

Modems that support call control must support the ITU V.251 standard for PC-controlled call control, including:

DCE-controlled V.8 operation with DTE notification.

DTE-controlled V.8 operation (<a8a> values of 2, 3, and 4).

DTE-controlled V.8 bis operation.

Backward compatibility for media detection with terminals using V.25 signaling, for example, data calling tone and fax calling tone.

Backward compatibility for media detection with older modems, for example, V.32 and V.32 bis.

Modems must provide a means for turning on the V.8 Calling Indicator signal for originating calls. Modems must also meet requirements stated in the Videophone-ready Modem Handbook, Version 1.0, which describes the specific implementation details essential to support H.324 voice-band video conferencing.

B6. If caller ID is implemented, modem complies with ITU-T V253 section

See ITU-T V253 section for details about correctly implementing caller ID reporting.

Note: Software-based modems are not required to capture caller ID while the system is either in ACPI S3 sleep state or resuming from S3 state.

B6. If voice modem is implemented, modem supports ITU V.253.

For a description of relevant AT commands for voice modems, see the “Voice Modem INF File Entries” listing in the Modem Devices section of the Windows DDK.

The capability for voice recording and playback (+VTX, +VRX) is not required.

© 1999-2002 Microsoft Corporation. All rights reserved.

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