Ah my old pal Xenix...
Once upon a time I worked on SCO Xenix (there apparently was once a MS Xenix if you can beleive that). (I know SCO is dirty word for Linux folks but SCO Unix was actually pretty good and came out after Xenix.) Xenix actually ran on the 286 PC if you'll believe that.
Anyway if you're using Xenix that old you likely don't have a TCP/IP on it. Originally TCP/IP was an add on prroduct for SCO Unix too.
The commands us old farts used back before the days of namby/pamby networking and GUIs were:
Command to connect - could use it either for dial out to modem or for cross over serial connections. (Similar in function to telnet but different in usage - there were a series of commands you could use with it that all started with "~". I recall ~. was what one hit to exit. I THINK ~put and ~get were the put and get commands for transferring a single file from/to the host you'd dialed into.
Used for transferring files over same serial style connections noted above. This was rather complicated to get going but would allow you to even schedule the file sends.
Not sure if that answered you.
If you're looking for a remote console it didn't have one as I recall.
However if you're running on PC hardware you can likely find a KVM that will let you do it. We use Raritan products here and hook most of our servers up to get remote access to the consoles. This is because we don't actually have monitors/keyboards attached to the servers as they're in our data center.
One thing I like about Raritan is it has a web browser we can use to access it instead of needing a physical device. This comes in quite handy for doing Systems Administration over VPN from my home to the office.
Their web site is: http://www.raritan.com
There are likely other KVM vendors that can do similar things. This just happens to be the one they were using here when I got here. My guess is none of them will be able to answer you specifically about Xenix. You probably would need to see if your monitor is VGA/SVGA (or worse yet XGA or -shudder- RGB) and your keyboard PS2 or whatever and just verify they have a attachment that supports that. The Raritan stuff we use here does most PCs (Linux/Windoze) and also has serial stuff for HP-UX servers.