On 13/07/2023 23.50, Alice Wyan wrote:
Just reread your post, I think I misunderstood it the first time around.
The AUX port on the Cisco is just an async serial port, right?
It is, yes.
So what you are suggesting, if I read correctly, would be:
a) plug a serial device (computer or whatever) on to the AUX port of the Cisco router
b) configure x25 routing on the Cisco so that incoming X.25 connections via XOT go to the AUX port
If you mean running actual X.25 communications software on the CP/M – I don't think that'll quite work, as IOS will not let you route X.25 over async lines; I believe it only works over synchronous serial ports. (The cpm-x25 docs mention synchronous mode being required on its end, too.)
Though if all you have is an async AUX, you can still connect devices over it, but you'll need the Cisco router *itself* to accept the X.25 call into one of its vty lines (service pad from-xot), and have that line configured with an `autocommand` to telnet somewhere further.
(E.g. if the device provides a plain login prompt via serial, then an autocommand to telnet to the router's own "reverse telnet" ports for the AUX line. If the device does PPP, *that* can run over AUX and you can have an autocommand to telnet to the device via PPP, or DECnet `lat` connection, or something such.)
(From what I understand, that's how actual "PADs" used to work – they'd accept the X.25 call on behalf of whatever async lines they had.)
Though the full "enterprise" IOS images might have more capabilities there; I still haven't installed the RAM upgrades to try it out.
