Modems: Class 1 and Business Class

In order for modems to properly work with Microsoft Small Business Server (SBS) especially the Fax Service, the modems should be Class 1 rated devices and designated by the modem manufacturers as "business class."

If the documentation or product packaging is not available to confirm conformance to these requirements, or you'll want to contact the modem manufacturer to verify the OEM's claim of Class 1 compatibility.

In addition to confirm that modems are in fact class 1 and business class, you can do so through Hyper Terminal.

• 1) First make sure none of the three-modem dependent services in Small Business Server, Fax Service, Modem Sharing Service , and Remote Access Service, are in use. For external modems, the easiest way is often to just look at the LEDs.

• 2) Then Temporarily stop the three-modem dependent services in Small Business Server: Fax, Modem Sharing, and Remote Access Service. You can stop these three modem-releated services from the Control Panel Services applet.

• 3) Next, open HyperTerminal from the Small Business Server Start Menu, under Programs, Accessories, Hyper Terminal.

• 4) When prompted to create a New Connection, click Cancel.

• 5) Type ATZ to reset the modem.

• 6) Issue the AT to take the modem "off hook". Assuming the speaker volume is turned up, you should be able to hear dial tone on the modem line.

• 7) To see if the device is in fact a Class 1 modem, type AT+FCLASSS=? (One of the responses should include the digit "1").

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