A reference for Designing Servers and Peripherals for the Microsoft® Windows® 2000 Server Family of Operating Systems Intel Corporation and Microsoft Corporation Publication Date—June 30, 2000
Unimodem-supported Modem Requirements
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- 101. PSTN modem supports ITU-T V.250 command set
- 102. Device complies with device class power management
- 103. Device supports wake-up events
- 104. Data modem supports v.90 and v.34 modulation and other requirements
- 105. Data modem supports digital connection to support host-side V.90 operation
- 106. Fax modem supports 14.4 Kbps (V.17) with Class 1 (T.31) command set
- 107. Modem supports call control signaling, controlled using V.251 modem commands
- 108. Modem supports blacklisted and delayed number clearing
- 109. Voice modem support is provided
- 110. Voice modem supports ITU V.253 (AT+V)
Unimodem-supported Modem RequirementsThe following requirements apply to modems connected as logically serial modems, using Unimodem as the TAPI service provider. 100. Modem controller meets minimum requirementsRequired The following are minimum requirements for the modem controller, in addition to supporting V.250:
101. PSTN modem supports ITU-T V.250 command setRequired ITU V.250 (formerly V.25 ter) is a superset of TIA-602. TIA-602 codifies the most common data modem commands and responses. If the AT command for a particular function is implemented, the corresponding V250 AT command must be supported. The essential V.250 commands are the following:
102. Device complies with device class power managementRequired The Communications Device Class Power Management Reference Specification, Version 1.0 or later, provides definitions for the OnNow device power states (D0–D3) for modems. The specification also covers the device functionality expected in each power state and the possible wake-up event definitions for the class. Power states D0 and D3 cold, including wake-on-ring support, are required for modems on power managed buses, including PCI and USB. Modem adapters that use the PCI bus must be capable of generating a power management event (PME# assertion) from the D3 cold device state.
A modem must be able to cause a wake-up event on an incoming ring as defined in Communications Device Class Power Management Reference Specification. This applies for modems on all power-managed buses, including PCI and USB. PCI devices are required to support D3 cold on a PCI 2.2-based system with auxiliary power. On all other power-managed buses (such as USB), support for either D2 or D3 is acceptable. 104. Data modem supports v.90 and v.34 modulation and other requirementsRequired The requirements for a data modem include the following:
105. Data modem supports digital connection to support host-side V.90 operation
V.90 depends on a digital connection for the host-side modem to the public telephone network, typically using T1 or ISDN. Server modems should be designed for digital connection, to support host side V.90, where digital connections are available. 106. Fax modem supports 14.4 Kbps (V.17) with Class 1 (T.31) command setRequired for PSTN connected modems, recommended for ISDN connected modems If fax modem capabilities are implemented, the fax modem must support 14.4 Kbps (V.17) with the Class 1 (ITU T.31) command set. If fax modems include fax/data media detection (for example, T.32 +FAA command), the INF must include the necessary registry keys, as defined in the MDK in the Windows 2000 DDK.
The following are recommended:
107. Modem supports call control signaling, controlled using V.251 modem commandsRequired Modems must support the ITU V.251 standard for PC-controlled call control, including:
108. Modem supports blacklisted and delayed number clearingRequired where applicable During certain international Post, Telephone, and Telegraph (PTT) certification processes, modems must support the blacklisted and delayed numbers feature. That means that when the modem fails to connect to a specific number for a certain number of times, the dialed number is stored in an internal list. Any subsequent automated dialing operation to this number is then either delayed for a time (delayed) or forbidden until some form of manual intervention occurs (blacklisted). The international certification processes specify that manual intervention using an external device is required in order to clear these numbers.
Voice capability is recommended for SOHO server modems to support Interactive Voice Response and 3-way DATA/FAX/Voice call classification on the same phone lines. This support, if implemented, must meet the requirements documented in guideline “#110. Voice modem supports ITU V.253 (AT+V).” 110. Voice modem supports ITU V.253 (AT+V)Required for PSTN connected modems; recommended for ISDN or T1 connected modems Voice capability is not mandatory, but if support for voice modem is implemented in a server system, it must meet the following requirements:
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