Years ago, in the BBS era, I designed an equipment to detect modem lock-up and take the line off-hook, so no further calls would be directed to the locked-up modem. It monitored eight lines simultaneously. It detected the ring, and if it ringed more than a certain number of times it took the line off-hook with a relay. I did it with an 80C32. Yes, good old times... Regards, Isaac Bob Axtell escreveu: > Interesting idea. > > I did something like this years ago (DOS days) when I had a remailer > service. It would detect a PC lockup and would power down the PC and > restart the PC through a relay in the AC line. I used an old PIC16C54 > driving a relay thru the NC contacts. The PIC was "triggered" through > an OPTO, the PC writing to a second parallel port. > > What memories. > > --Bob > > On Tue, Jun 2, 2009 at 10:15 PM, Carlos Marcano wro= te: > = >> Well, i don't know how did this happen but somehow I missed your >> responses to my original post. >> >> In case anybody is interested, I have not completed this project (I >> started but barely got some initial concepts and drawings on the >> design board) but I have noticed something strange, at least for me, >> on my LAN. Any computer that I connect to one of the four wired >> gigabit ethernet ports of the DIR-655 draft-n wifi router, will >> invariably stop downloading using utorrent at some random period of >> time, stalling any internet acces through my network. But if utorrent >> is used from one of my laptops, through the wifi connection, the >> internet connection is never lost! >> >> I am a little bit frustrated because it is not a cheap router and it >> is suposed to be a prime performer but I don't know if there is a >> plaussible answer for this or I have a defective unit... >> >> Regards, >> >> *Carlos Marcano* >> -Guri, Venezuela- >> >> 2009/3/4 Jake Anderson : >> = >>> The problem is more than likely the P2P application is filling up the >>> connections table in the router. >>> its a common problem with cheap routers, see if there is a firmware >>> update available. >>> Alternatly bridge the router and use a software firewall or pppeo client >>> to get online. >>> >>> Carlos Marcano wrote: >>> = >>>> Good day, people. >>>> >>>> I would like to ask for opinions regarding this matter. I am using an >>>> AXESSTEL D800 1xEV-DO fixed cellular modem to access internet. It is >>>> supposed to be a 1 Mbps downloading connection but most of the time it >>>> underperforms like a 256 kbps one. The modem/router (has a DHCP server >>>> running) is connected trough its 10/100 Mbps Ethernet port to a D-Link >>>> DIR-655 draft-n wifi router (used as an acces point). My desktop is >>>> connected via cable to one of the four gigabit Ethernet ports of the >>>> DIR-655, leaving the wifi use just for the occasional connection of my >>>> wife's laptop. >>>> >>>> Because of the lousy internet connection, whenever I need to download >>>> ISO images of the Ubuntu OS new releases I use a p2p protocol >>>> (bittorrent) to get them, with utorrent being the client used (when >>>> under Windows XP) and Transmission if under Ubuntu. >>>> >>>> The thing is that in any of them the downloading works great for an >>>> undetermined and variable period of time - sometime hours, sometime >>>> minutes - and then the connection stalls. No p2p, no web browsing. The >>>> modem seems to be connected to the ISP but no data moves around. I try >>>> to soft reset both modem and wifi router but no luck. I then try to ha= rd >>>> reset, no luck either. Only way to get back in business is to unplug >>>> both of the devices, wait a few seconds, replug them and voila!... wor= ks >>>> again. >>>> >>>> This behaviour is very frustrating because sometimes I have left the >>>> download alive and kicking nicely (120 - 150 kbps, which is very good >>>> for my connection) with an ETA of 30 minutes and when I come back half >>>> an hour later I have found that the download stalled the second I left >>>> the room and only downloaded 10 percent of the iso and the connection = is >>>> in the "zombie" status. >>>> >>>> As I have not found a solution for this problem, I think I will need to >>>> implement a brute force approach, I would need to develop a software - >>>> hardware solution: >>>> >>>> Software: An always running process which in some way monitors de >>>> downloading speed and if it falls below certain level then it will... >>>> (see below) >>>> >>>> Hardware: ... trigger a device that would turn off, wait and turn on t= he >>>> modem and the wifi router. >>>> >>>> At first sight this looks like over killing but I am out of better >>>> ideas. My questions would be: >>>> >>>> A) Is this a bad idea? >>>> >>>> B) If not, should I use USB ports to connect to the external >>>> device? My desktop has a parallel port and it would be easier to >>>> interface to the device this way - done it before - but I am planning = on >>>> upgrading my box so there is no guarantee I will have that port later. >>>> >>>> C) Should I use a micro controller? I guess that if I am going to >>>> use the USB ports I would need to use a micro. >>>> >>>> D) If yes, which one would you recommend? I have done some pic >>>> programming before (assembler), mostly in 16F parts. >>>> >>>> Sorry for the lengthy post, I hope I made myself clear and thanks in >>>> advance for your help and ideas. >>>> >>>> Regards, >>>> >>>> *Carlos Marcano* >>>> - Guri, Venezuela - >>>> >>>> = >>> -- >>> http://www.piclist.com PIC/SX FAQ & list archive >>> View/change your membership options at >>> http://mailman.mit.edu/mailman/listinfo/piclist >>> >>> = >> -- >> http://www.piclist.com PIC/SX FAQ & list archive >> View/change your membership options at >> http://mailman.mit.edu/mailman/listinfo/piclist >> >> = > > = > ------------------------------------------------------------------------ > > > No virus found in this incoming message. > Checked by AVG - www.avg.com = > Version: 8.5.339 / Virus Database: 270.12.53/2154 - Release Date: 06/04/0= 9 05:53:00 > > = __________________________________________________ Fa=E7a liga=E7=F5es para outros computadores com o novo Yahoo! 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