print to /dev/ttyaxx

I have a Unix server SCO 5.0.6 and all terminals run via tcp/ip, I need to be able to print directly to the device ej. cat {file} >/dev/ttya05, without having an rs232 cable, I want to keep the ip funtionality

I am not clear what is meant by running tcp/ip. How are the terminals connected? Are they telnetting to the UNIX host? If so, then they would have a pseudo device on the UNIX host that you could cat data to.