HP 24SII - Manual (Page 165)

Telplex Model TX108M is an asynchronous statistical multiplexer with
built-in modem. Eight individual communications channels are
multiplexed into a single dial-up or leased telephone line, cutting
phone line costs to a minimum. The TX108M features a V.32 internal
modem with MNP Class-4, which provides reliable communication at
speeds up to 9600 bps.
Telplex Model BX9600 is an external asynchronous 9600 bps
modem. The BX9600 features V.32 full duplex communication,
automatic or manual dialing and answering, call progress detection of
dial tones and busy signals, pulse or tone dialing, and a variety of
other convenient features. The BX9600 interfaces easily to statistical
multiplexers and other peripheral sharing devices to allow multiple
users to share the modem. And its MNP Class 4 error correction
ensures that the BX9600 provides accurate transmission.
The BX2448 is a V.22 bis external modem which uses deal-up or
leased telephone lines and comes equipped with many advantageous
features, such as MNP Class 5 data compression, which enables data
transmission at speeds to 4800 bps and, MNP Classes 2 - 4 error
correction. A wide selection of user-programmable features allows
you to customize the modem to your own individual application
situation.
500 SERIES MULTIPORT CONTROLLERS
Included in the 500 Series line of multiport controllers are units
intended for the following applications:
Port Expansion (A-Series): Allows a single serial port on a
computer to individually access up to 17 peripheral devices with full
duplex communication.
Single Port Contention (DQ-Series): Allows up to 17 terminals to
contend for a single port on a computer system.
Multiple Port Contention (B-Series): Allows either 6, 8 or 12
terminals to contend for either 3, 4 or 6 computer ports respectively.