Transdata Model 305

It would be nice to find someone that had used one of these to find out how well it worked. Below are the details as copied from the original sheet that was contained in the case of the unit. This unit has still got the power cable, the optional modem connection lead and a new roll of paper in the lid. Going by the date on the print out the last time it was used was in 1985, I haven't even considered plugging this in to see what happens as there isn't a lot you can do with it now even if it did go.
The Model 305 - a fully portable terminal - use it wherever there is a telephone. No costly modem required, dial a computer, place the handset in the terminal accoustic coupler and you are 'on-line'. The 305 provides computing power throughout Europe wherever you go. Sales Directors access your finished stock files, enter your orders - Financial Directors your management forecasts - Money Stock and commodity Dealers, the latest deals and prices - in your office, home or hotel. The 305 is easy to carry, light small yet rugged. It will fit under your airline seat - it's hand luggage.

The Model 305 is a lightweight portable Computer Terminal. It is packaged in a robust and durable case with a detachable lid. The lid accommodates the power connection lead, optional modem connector lead and a spare paper roll. Thus the 305 is self-contained, easily carried and will withstand the knoks of transit.

The Model 305 will communicate with Computer Systems (or another Model 305) which are 'teletypewriter' compatible, at speeds up to 300 baud, in full or half duplex mode. It incorporates an accoustic modem so that it may be used directly with a telephone, or it can be connected to an external modem.

The Accoustic Modem connects the terminal to the telephone through the handset - where it is desired to use another modem, a V24 interface socket is provided. Transdata have recognised that the Accoustic Coupler is the weakest chain in the communication link and have concentrated considerable research and development effort into improving previous shortcomings of Accoustic Couplers.

A digital crystal controlled technique has been developed which improves reception of signals with a high noise level. Additionally, the unit does not need adjustment and recalibration during its service life.

The Keyboard is an electronic contact keyboard. It features 'n key roll over' so that only the first key pressed produces a character, any other key pressed at the same time must be released and pressed again to produce a character.

The keyboard has three levels of operation, unshifted, shifted and control. In the unshifted level capital letters and numbers are produced. In the shifted level reduced sized alpha capitals are produced (simulated lower case). In the control level, the ASCII control codes are produced.

The Printer contained within the terminal is an electronic thermal dot matrix unit. It produces a character image on the heat sensitive paper formed from a matrix of 35 elements. The image is clear, stable and does not fade. The particular advantage of this method of printing is that it is electronic so that there are no wearing parts and the unit has a service life and reliability an order better than mechanical printers. As the printer does not impact a character onto the paper, it is nearly silent in operation and the terminal may be used without distrubing other people.



Please e-mail me if you have further information or any criticism of the details shown.

SPECIFICATION (copied from document contained inside cover of the unit)

Columns 80
Characters 94
Transmision Codes ASCII
Rate 100, 110, 300 baud
Type Asyncronous serial by character
Bits At 100 and 110 baud
1 start, 8 data, two stop
At 300 baud
1 start, 8 data, one stop
Parity Odd, even or mark factory set
Mode Half or full duplex
Dimensions Wide x 19.5"
Depth x 14.5"
Height x 5"
Weight 22 lbs
Controls Power On-Off
Return print head
Line feed paper
On - Line - Local
Indicators On - Line
Carrier detect
Paper Transdata thermal printing paper
8.75" x 100ft, or 8.75" x 150ft
Acoustic Interface Adjustable rubber cups suits most european handsets


European CCITT
1080 HZ Transmit
1750 HZ Receive
1750 HZ Transmit
1080 HZ Receive
Receive level -26 dbm
Transmit level -13 dbm
Data interface CCITT V24 Socket (for wired modem)
Power 220-260v 50Hz 80 watts maximum



Last Updated 13th September 2002