ppp problems with strange log diagnostics

[Laurent EVAIN <evainlau@club-internet.fr>]

Hi, 

I run Debian 2.2 release 3 (stable)
and I use the script ``pon'' to connect 
to my IP.
Sometimes I get a connection, sometimes the connection
stops and/or I can't connect.
Since I have 2 providers, I suppose that the problem
comes from my side. 

The analysis in /var/log/syslog of the problem
is not always the same.  For instance, sometimes
the problem is ``NO CARRIER'', sometimes 
it is ``serial link seems to be disconnected'',
``no response to x requests'',
``Modem Hangup'' or finally 
``serial line is looped back''.
I also saw the line:
Feb 12 09:56:03 debian modprobe: modprobe: Can't locate module net-pf-10


I don't understand what these messages mean.
Is there something that I should reinstall
or reconfigure ? 
(I put below the significant 
lines of /var/log/syslog).


Thanks very much for your help.

Laurent.





################
First type of error
################
Feb 12 10:31:38 debian pppd[1369]: pppd 2.3.11 started by laurent, uid 1000
Feb 12 10:31:39 debian chat[1370]: abort on (BUSY)
Feb 12 10:31:39 debian chat[1370]: abort on (NO CARRIER)
Feb 12 10:31:39 debian chat[1370]: abort on (VOICE)
Feb 12 10:31:39 debian chat[1370]: abort on (NO DIALTONE)
Feb 12 10:31:39 debian chat[1370]: abort on (NO DIAL TONE)
Feb 12 10:31:39 debian chat[1370]: abort on (NO ANSWER)
Feb 12 10:31:39 debian chat[1370]: send (ATZ^M)
Feb 12 10:31:39 debian chat[1370]: expect (OK)
Feb 12 10:31:39 debian chat[1370]: ATZ^M^M
Feb 12 10:31:39 debian chat[1370]: OK
Feb 12 10:31:39 debian chat[1370]:  -- got it 
Feb 12 10:31:39 debian chat[1370]: send (ATL1M1DT0860301020^M)
Feb 12 10:31:39 debian chat[1370]: expect (CONNECT)
Feb 12 10:31:39 debian chat[1370]: ^M
Feb 12 10:32:24 debian chat[1370]: ATL1M1DT0860301020^M^M
Feb 12 10:32:24 debian chat[1370]: NO CARRIER
Feb 12 10:32:24 debian chat[1370]:  -- failed
Feb 12 10:32:24 debian chat[1370]: Failed (NO CARRIER)
Feb 12 10:32:24 debian pppd[1369]: Connect script failed
Feb 12 10:32:25 debian pppd[1369]: Exit.



################
Second type of error
################
...as above....
Feb 12 10:28:53 debian chat[1355]:  -- got it 
Feb 12 10:28:53 debian chat[1355]: send (ATDT0860922000^M)
Feb 12 10:28:54 debian chat[1355]: expect (CONNECT)
Feb 12 10:28:54 debian chat[1355]: ^M
Feb 12 10:29:20 debian chat[1355]: ATDT0860922000^M^M
Feb 12 10:29:20 debian chat[1355]: CONNECT
Feb 12 10:29:20 debian chat[1355]:  -- got it 
Feb 12 10:29:20 debian chat[1355]: send (\d)
Feb 12 10:29:21 debian pppd[1354]: Serial connection established.
Feb 12 10:29:21 debian pppd[1354]: Using interface ppp0
Feb 12 10:29:21 debian pppd[1354]: Connect: ppp0 <--> /dev/ttyS0
Feb 12 10:29:22 debian pppd[1354]: sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x9d549e2d> 
<pcomp> <accomp>]
Feb 12 10:29:49 debian last message repeated 9 times
Feb 12 10:29:52 debian pppd[1354]: LCP: timeout sending Config-Requests 
Feb 12 10:29:52 debian pppd[1354]: Connection terminated.
Feb 12 10:29:53 debian pppd[1354]: Exit.


################
Third type of error
################
...
Feb 12 10:23:53 debian pppd[1190]: sent [LCP EchoReq id=0x3e magic=0x350a369a]
Feb 12 10:24:23 debian pppd[1190]: No response to 4 echo-requests
Feb 12 10:24:23 debian pppd[1190]: Serial link appears to be disconnected.
Feb 12 10:24:23 debian pppd[1190]: Script /etc/ppp/ip-down started (pid 1341)
Feb 12 10:24:23 debian pppd[1190]: sent [LCP TermReq id=0x2 "Peer not responding"]
Feb 12 10:24:23 debian pppd[1190]: Script /etc/ppp/ip-down finished (pid 1341), status = 0x0
Feb 12 10:24:26 debian pppd[1190]: sent [LCP TermReq id=0x3 "Peer not responding"]
...
Feb 12 10:24:53 debian pppd[1190]: Connection terminated.




################
Fourth  type of error
################
...
Feb 15 00:00:15 debian pppd[2215]: Hangup (SIGHUP)
Feb 15 00:00:15 debian pppd[2215]: Modem hangup
Feb 15 00:00:15 debian pppd[2215]: Script /etc/ppp/ip-down started (pid 2399)
Feb 15 00:00:15 debian pppd[2215]: Connection terminated.


################
Fifth  type of error
################
...
Feb 14 23:07:35 debian pppd[2041]: pppd 2.3.11 started by laurent, uid 0
Feb 14 23:07:36 debian pppd[2041]: Serial connection established.
Feb 14 23:07:36 debian pppd[2041]: Using interface ppp0
Feb 14 23:07:36 debian pppd[2041]: Connect: ppp0 <--> /dev/ttyS0
Feb 14 23:07:38 debian pppd[2041]: Serial line is looped back.
Feb 14 23:07:38 debian pppd[2041]: Connection terminated.