Instruction manual

HARDWARE AND SOFTWARE DETERMINATION

3270 Data Module

The 3270 Data Module provides a Category A coaxial DCE interface for connection to 3270-type

data terminals or a cluster controller. It also provides a DCP interface connection to the digital

switch.

The 3270 is available in the following three models:

3270T (Terminal)—Connects to a Category A 3270-type terminal, such as the 3278 Infor-

mation Delivery System. The 3270T Data Module must connect through the digital switch

to a 3270C (Controller) Data Module.

3270A (Asynchronous)—Provides the same function as the 3270T Data Module. It also

allows the 3270-type terminal to emulate a Digital Equipment Corporation VT 100 or an

AT&T asynchronous terminal.

3270C (Controller)—Connects an IBM 3274 or 3276 cluster controller to the digital

switch. A 3270C Data Module can contain up to eight ports.

Z3A Asynchronous Data Unit (ADU)

The Z3A ADU is a DCE-type device that allows direct connection between EIA-232C equipment

and the TN726 Data Line circuit pack. The ADU can handle standard data rates from 300 to

19,200 bps, asynchronous, full duplex only.

The ADU is used when the DTE is located more than 50 feet from the Data Line circuit pack and

is installed with the DTE. An optional originate or disconnect switch may be used with the ADU.

Pooled Modem

Modem pools may reduce the number of modems and may also reduce the number of dial-up

facilities needed for data transmissions. The integrated and external modem pools can handle up

to 32 simultaneous data calls per group in up to 5 groups. Integrated modem pools can operate

at speeds of 300, 1200, and 2400 bps. Combined modem pools (external modem pools) can

operate at speeds up to 19.2 kbps.