56 k modem

[Basil Chupin]

On 17/08/2010 11:35, chris wrote:
> On Tue, 2010-08-17 at 02:21 +0100, ms wrote:
>    
>> On 17/08/10 01:47, chris wrote:
>>      
>>> Hi Using 10.04, I run a 56k external modem on my laptop.  This is
>>> running through a usb to serial cable. Using gnome ppp front end for
>>> wvdial
>>> Up to know, and since 6.04, this has never given a problem.
>>> since the last kernal update, it is now dropping the connection, and I
>>> have to reboot for the system to find the modem.
>>>
>>> How can I restart the connection with out re-booting
>>>
>>>        
>> Hmm, for a start, try:
>>
>> sudo /etc/init.d/network-manager restart
>>
>> and see if it comes back.
>>
>> Also, check if the logs (/var/log/messages) say anything odd regarding
>> your modem and report.
>>
>> cheers,
>> m.
>>
>>      
> Hi again,
> Here is the log of this mornings drop out
>
> Aug 17 08:17:58 lucy pppd[1647]: Using interface ppp0
> Aug 17 08:17:58 lucy pppd[1647]: Connect: ppp0<-->  /dev/ttyUSB0
> Aug 17 08:18:02 lucy kernel: [   62.078628] PPP BSD Compression module
> registered
> Aug 17 08:18:02 lucy kernel: [   62.086497] PPP Deflate Compression
> module registered
> Aug 17 08:18:02 lucy pppd[1647]: local  IP address 218.101.96.206
> Aug 17 08:18:02 lucy pppd[1647]: remote IP address 218.101.58.67
> Aug 17 08:18:02 lucy pppd[1647]: primary   DNS address 203.97.78.43
> Aug 17 08:18:02 lucy pppd[1647]: secondary DNS address 203.97.78.44
> Aug 17 08:19:40 lucy kernel: [  159.992544] CE: hpet increasing
> min_delta_ns to 15000 nsec
> Aug 17 08:23:45 lucy pppd[1647]: Terminating on signal 15
> Aug 17 08:23:45 lucy pppd[1647]: Connect time 5.8 minutes.
>
> Now what does terminating on signal 15 mean?
> cheers chris
>    

What that magic number means I do not know, but dial-ups are very 
susceptible to line noise. The they will drop the connection at "the 
drop of a hat" - well, not quite but close :-) .

One of the things which used to cause severe line noise was a new 
telephone unit which drew power from the line to recharge the capacitor 
for it NVRAM for stored 'phone numbers. But this is some time 
ago.....However, does anyone else use the phone at home while you are 
using the modem? If so this will cause a disconnect. (Kids in the next 
room are the usual culprits :-) .)

BC


-- 
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