Building an RS-232 Port into the 2050 Modem

Step-by-step guide to adding a Zebra Systems RS-232 circuit board inside the TS2050 modem case, selectable via a 3PDT mini-switch mounted in the back panel. Rather than housing the circuit in a separate external box, Latker drills into the modem case, cuts PCB traces, adds jumper wires to pins 3, 17, and 22 of the 8251 UART, and wires directly to a Break-out Adapter (Dick Smith Electronics). Includes a modem-eliminator wiring configuration and Memorywriter communication option settings.