IBM ThinkPad 770, Руководство пользователя

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not be reported as a fault, unless ordinary voice telephone calls are
substandard.
In the U.S., current FCC regulations limit the maximum speed for
downstream communication to 53 Kbps. Even though your modem
contains 56-Kbps technology, the connect rate in the receive
direction might be significantly less than 56 Kbps.
Currently, 56-Kbps capability is in the receive direction only (from the
ISP to your local modem). The transmit or send direction (from your
local modem to the ISP) uses V.34 technology.
Note: 56-Kbps transfer rates are not available in all locations or countries.
You must check with your ISP to determine if your area is capable of
56-Kbps transfer rates.
Telephony Features
The ThinkPad modem, with the associated software, provides the
following telephony features:
Industry standard modem support up to 33.6 Kbps
Industry standard fax support up to 14.4 Kbps
Computer telephony function support
– DTMF and pulse dialing
– Detecting DTMF digits received from the phone line
– Call progress monitoring
– Auto-dialing feature
– Telephony API (TAPI) support through Windows 95
Unimodem V (Windows 95 only)
Telephone answering machine support (Windows 95 only)
– Recording and playback of messages and greetings
– Answering device with caller ID
– Modem class-8 AT commands for TAPI calls
Full-duplex speaker phone support (Windows 95 only)
– Acoustic echo cancellation
Other
– DOS box operation for 33.6-Kbps data and 14.4-Kbps fax
– System-level and device-level power management
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IBM ThinkPad 770E/770ED User's Guide Supplement