Significantly higher Internet modem connection speeds up to 56
Kbps require all-digital transmission connections from your ISP to the
line card in the central office to which your phone line is connected.
The actual rate of reception is limited by the quality of your telephone
line, which may vary from location to location.
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, 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
12
IBM ThinkPad 600 Online Book
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