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Date:      Thu, 27 Aug 1998 11:41:00 -0700
From:      Scott Blachowicz <sab@seanet.com>
To:        freebsd-questions@FreeBSD.ORG
Subject:   PPP over ISDN USR Courier I-modem via ByteRunner TC-200 card
Message-ID:  <19980827114100.B2857@dniquote.com>

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Hi-

We recently moved an external USRobotics Courier I-modem from a Windows NT
(4.0 SP3) box to a FreeBSD (2.2.5R) box.  That ISDN line is used as the
gateway to our ISP for a network of around 5-10 systems.  It is a full-time
dedicated ISDN line, so on the BSD box I run:

	ppp -ddial seanetISDN0

Now...we have it connected to a serial port with a 16550A UART which limits
the bandwidth a bit (to the 115200 max for the serial port), and it seems to
work OK.  In the NT box we had it connected to a ByteRunner TC-200 [a 2 port
16650 serial card...the 9 pin connector ("COMB") is setup as COM3/IRQ5 and the
25 pin connector ("COMA") is disabled].  On that card we had the clock
multiplier jumper set to double the speed (i.e. system says 115200 and the
card uses 230400 to talk to the modem).  I think we're using the same cabling
we were on the NT box.

So...the problem is...when I have the modem hooked up to the COM3 port, it
fires up the connection to our ISP and runs for a while just fine.  Then after
a little while (a few to 10 minutes or so), it seems to just stop.  I'm
running

	tcpdump -li tun0

and I see lines for traffic trying to go out, but I don't see the send data
light flashing or the receive data light flashing.  It's just stuck somehow,
somewhere.

When that happens, I do a 'kill' on the ppp process, switch the cable back to
COM1, go change the ppp.conf from cuaa2 to cuaa0, fire it back up and it
works.  I've tried various tricks of enabling/disabling lqr & pred1 in my
ppp.conf; enable/disable the COM4 port on the ByteRunner card.  I'll append my
ppp.conf to this message.

Any ideas on how to get this working via the ByteRunner card?
-- 
Scott Blachowicz
sab@seanet.com

my ppp.conf file:

default:
 disable lqr
 deny lqr
 disable pred1
 deny pred1
 set socket 3000 quoteme
 set authname USERNAME
 set authkey PASSWORD
 set redial 10.5 5
 set device /dev/cuaa0
 set speed 115200
 ##set log Phase Chat Connect Carrier LQM Link Command
 set log +phase +chat +connect +lqm +command
 set escape 0
 set dial "ABORT BUSY ABORT NO\\sCARRIER TIMEOUT 5 \"\" ATM0E1%C1%M3&D2&Q5S46=138S48=7S37=11 OK-AT-OK \\dATDT\\T TIMEOUT 30 CONNECT"

seanetISDN0:
 set phone "XXX-XXX-XXXX|XXX-XXX-XXXX"
 set timeout 0
 set dial "TIMEOUT 70 \"\" AT OK-AT-OK AT&F1*V2=5S67=0S68=64S69=0*D0=1*P=3 OK AT&F1E0Q0V1&A3&C1&D2S0=0 OK ATS7=55S19=0L3M1&M5&K1&H1&R2&I0B0X4 OK \\dATDT\\T CONNECT"
 set ifaddr 199.181.167.103 199.181.164.1/0
 add 0 0 HISADDR


seanetISDN2:
 set device /dev/cuaa2
 set phone "XXX-XXX-XXXX|XXX-XXX-XXXX"
 set timeout 0
 set dial "TIMEOUT 70 \"\" AT OK-AT-OK AT&F1*V2=5S67=0S68=64S69=0*D0=1*P=3 OK AT&F1E0Q0V1&A3&C1&D2S0=0 OK ATS7=55S19=0L3M1&M5&K1&H1&R2&I0B0X4 OK \\dATDT\\T CONNECT"
 set ifaddr 199.181.167.103 199.181.164.1/0
 add 0 0 HISADDR


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