miorelli@pwa-b.UUCP (Bob Miorelli) (09/18/85)
I have a problem with dialing into a system here. The system is 4.2 with a df03 auto-answer modem plugged into a dmf (3rd dmf, port 0, or ttyi0). The modem answers fine and carrier locks on, but the carrier detect is never passed on to init. Init owns the line all the time -- it never spawns a getty. The entry for this in /etc/ttys is `13ttyi0' so it will autobaud and be a login terminal (for tip or uucp). I tried changing to other ports on other dmf's, but the same thing happens. I can cp <filez> /dev/ttyi0 and the data goes out (can see it on a serial line analyzer), so the port seems to be OK. What did I miss?? my other system uses Able dh's and all is well there with the dial-in ports. Thanks for any light you can shed on this subject. -- -->BoB Miorelli, Pratt & Whitney Aircraft philabs!pwa-b!miorelli utah-cs!utah-gr!pwa-b!miorelli
root%bostonu.csnet@CSNET-RELAY.ARPA (BostonU SysMgr) (09/21/85)
>From: miorelli@pwa-b.UUCP (Bob Miorelli) >Subject: help with 4.2 dmf autoanswer problem > >I have a problem with dialing into a system here. The system is 4.2 >with a df03 auto-answer modem plugged into a dmf (3rd dmf, port 0, or >ttyi0). The modem answers fine and carrier locks on, but the >carrier detect is never passed on to init..... The first (obvious) thing to check is the wiring, the rs232 connector might be defeating the signals (such connectors are common as sometimes we want to do that.) The second thing to check is your config, the flags field for the device dmf entry indicates which ports are to be treated as modem controlled and which as 'defeated' (eg. by wiring as above.) Note also (your note seems to indicate that you understand this) only ports 0 and 1 will work as you want in any case. If a bit is *on* in the flags field it means 'defeated', off means modem control, if you want to enable those two ports the right thing is: ... flags 0xfc tho extending to 16 bits probably won't hurt (0xfffc). You then have to re-build your kernel (yeah, we all know, a kludge, should be settable at any time.) Beyond that it could be any number of things, I would check out the modem next (borrow a different modem that you know works maybe.) Parity, etc etc. -Barry Shein, Boston University