topic Re: cu command in Operating System - HP-UX

cu command

dkidd — Thu, 02 Nov 2000 23:11:57 GMT

Have set up an auto answer dialin modem on mux port 3 (HP-UX 10.20 K200) ttyd0p3. Can dialin once from pc, but then have to poweroff system modem before it will answer a further call .. trying to cu -l /dev/ttyd0p3 but get 'Connect failed: line problem' .. even after power off/on. (Trying to config for ATZ - modem auto reset)
Ideas anyone ?

Re: cu command

Madhu Sudhan_1 — Fri, 03 Nov 2000 01:40:06 GMT

It looks like the Modem Initilization string is not set properly for hangup.
Most of the Modem related problems gets solved by setting modem to factory defaults and then setting your own string. Refer to your modem Manual. (Ultimate guide of yr modem).

A a url about modem hangup string is

http://www.nessus.org/plugins/Denial_of_Service/+_+_+_ATH0_modem_hangup.html

Hope this helps.

Good luck.

......Madhu

Re: cu command

Madhu Sudhan_1 — Fri, 03 Nov 2000 01:42:20 GMT

Re: cu command

Patrick Wessel — Fri, 03 Nov 2000 07:58:24 GMT

Disconnect your modem and try the cu? again. If you still receive the "line problem" without any device attached to the port you have to reboot the system.

Re: cu command

dkidd — Sun, 05 Nov 2000 19:13:44 GMT

Thanks guys ; I tried EVERYTHING ; even changed modems ; suspect I need a patch/HP advice.

Re: cu command

Devbinder Singh Marway — Mon, 06 Nov 2000 11:14:04 GMT

Have a look at document KBRC00001078

Basically it says :- There may be a process hung on the port do fuser /dev/tty???

Check for lock files in /var/spool/locks/LCK..tty ( remove these if any)

The console has modem access locked / remote console . So on the CONSOLE type ctrl b ,
then ur (unlock remote) then dr (disable remote)

then type co ( to get back to shell)

Check the permisions of device files

/dev/ bin bin (try 660 permissions)

The other thing is check modem string keep carrier high i.e. at&d3 ( depend on what type of modem you have check what string is passed to fore CD . The other thing to check is CD light on on the modem if so then it is forced.

Have you tried the above ?

laters ..

Re: cu command

dkidd — Wed, 08 Nov 2000 02:19:32 GMT

Thanks guys .. tried the re-boot in the end, after installing PHNE_21872. Problem still there tho ... modem config is fine, cable appears fine, system is not raising D(TR), so modem is not answering phone call (see http://docs.hp.com/cgi-bin/fsearch/framedisplay?top=/hpux/onlinedocs/B2355-90053/B2355-90053_top.html&con=/hpux/onlinedocs/B2355-90053/00/00/20-con.html&toc=/hpux/onlinedocs/B2355-90053/00/00/20-toc.html&searchterms=modem&queryid=20001107-181826 ; back to HP I'm afraid.