IBM 3777 Model 3 Communication Terminal

This Communication Terminal connects to a mainframe through a 19,200 baud modem, and uses the Multiple Logical Unit (MLU) protocol of the Systems Network Architecture (SNA) to support up to six data streams at the same time.

It can use the 8" diskettes, punch cards, or magnetic tape as input, and the printer, diskettes, and magnetic tape as output devices.

There is even an option to encrypt the data going to/from the mainframe.

It needs a little assembly and some repairs, but it looks like it is complete.

That is a 5202 card reader on the desk, and a 1024 (14 lines of 64 characters) character display at the left.

There are 8" diskette drives behind the doors at the right and left.

We have the 3203-3 1000 LPM line printer and the 3411 9-track 800/1600 BPI magnetic tape drive too.

We don't have the 3521 card punch and 3782-1 punch controller that can be used with the 3777.

Click on the image for a larger view.