1. You are viewing our forum as a guest. For full access please Register. WindowsBBS.com is completely free, paid for by advertisers and donations.

strange issues-Wireless router and UPS

Discussion in 'PC Hardware' started by hornet, 2008/02/23.

  1. 2008/02/23
    hornet

    hornet Inactive Thread Starter

    Joined:
    2008/02/15
    Messages:
    28
    Likes Received:
    0
    Hi

    I seem to have a very strange problem with my wireless ADSL router and the attached UPS.

    Firstly my router is US Robotics USR9108 and the UPS is Prolink EnerHome PC650.

    I purchased this UPS about a month ago just to protect the Router and to avoid unnecessary and painful shutdowns while downloading during power cuts.

    After my purchase I ve recharged the UPS batteries for 12 hours without any load attached to the UPS(as instructed by the manufacture).

    Only today we had a power cut and as soon as the main power went router restarted when the battery power kicked in.but when the main power resumes router remained on.

    I was really curious about this and did the following.

    1.Attached other devices(small radio/computer monitor) and tested but all worked without any problems.
    2.Then i attached the router , unplugged the telephone cable from the router then test but this time router DID NOT restart.
    3.Re connect the phone cable to the router and test boom! router DID restart.

    Can anyone tell me whats going on?Is it the UPS or the router or the phone line/cable(the phone cable attached to the router is coming through a separate splitter) causing this?

    Thanks alot.
     
    hornet,
    #1
  2. 2008/02/23
    PeteC

    PeteC SuperGeek Staff

    Joined:
    2002/05/10
    Messages:
    28,896
    Likes Received:
    389
    Surely that is what you would expect? On interruption of main power supply the UPS kicks in and keeps the router going. When normal service is resumed you would not expect the router - or anything else on the UPS to shut down.

    Router is best left powered up 24/7. as I understand, and should power up regardless of whether or not the phone cable is plugged in.
     
    PeteC,
    #2


  3. to hide this advert.

  4. 2008/02/23
    hornet

    hornet Inactive Thread Starter

    Joined:
    2008/02/15
    Messages:
    28
    Likes Received:
    0
    I think you ve misunderstood my issue.

    After loosing the main power and before battery kicked in(i think the time difference is in milliseconds) router rebooted.So the network connectivity(LAN+WAN) was lost.I was downloading a huge file without any resume support so because of that i ve lost that download.

    After that i deliberately disconnected the UPS from the wall socket and each and every time router rebooted even with the battery power.After rebooting it performed normally.

    But as soon as i removed the phone cable from the router,router stopped rebooting even when i disconnected the UPS and allow it to run on batteries.This time none of my computers lost its LAN connection.

    Hope i clarified my issue now.
     
    hornet,
    #3
  5. 2008/02/23
    mflynn

    mflynn Inactive

    Joined:
    2002/08/14
    Messages:
    4,141
    Likes Received:
    9
    Is the Cable/DSL modem also on the UPS?

    If the Cable/DSL modem powers down the Router will have to reinit in order to retrieve the new signal from the Modem.

    The router would not restart just by unpluging but would when reconnected! As above.

    Mike
     
    mflynn,
    #4
  6. 2008/02/23
    hornet

    hornet Inactive Thread Starter

    Joined:
    2008/02/15
    Messages:
    28
    Likes Received:
    0
    Router is the only device attached to the UPS and this is a all in one router, cable modem+router.
     
    hornet,
    #5
  7. 2008/02/24
    TonyT

    TonyT SuperGeek Staff

    Joined:
    2002/01/18
    Messages:
    9,072
    Likes Received:
    400
    There should NO delay if the modem-router is connected to the UPS, it should be a seamless interuption, all comnnected devices should remain powered ON.

    However, since you have a DSL gateway that gets the Internet signal via a telephone line, when your power goes OFF and ON, there's a surge in the phone line or the phone system itself is without power for a split second, long enough to cause the modem-gateway to need to refresh its connection.

    Most decent UPSs have phone line ports. I suggest using that port for your dsl phone line and/or use a separate UPS for the phone transformer in your house. If that does not handle it then the issue could be due to a built in delay by the phone company systems should the power be interupted. Remember, when power goes OFF to your house it also goes OFF on the telephone poles/lines/phone amps, etc.
     
    TonyT,
    #6
  8. 2008/02/25
    hornet

    hornet Inactive Thread Starter

    Joined:
    2008/02/15
    Messages:
    28
    Likes Received:
    0
    TonyT you are a genius:D.I simply forgot this detail.But i never knew that could cause the router to reset its internet connectivity.

    Many many thanks for your valuable reply.I ll give it another try by running the phone line through the UPS.Hope this ll work for me.

    Also theres no separate Phone transformer at my premises.Theres only a small box where the telephone wire from the pole gets attached to and from there another telephone wire connects to our in house phone wall socket(Sorry for my vague description but i m not familiar with the telco terms)
     
    hornet,
    #7
  9. 2008/02/25
    hornet

    hornet Inactive Thread Starter

    Joined:
    2008/02/15
    Messages:
    28
    Likes Received:
    0
    BAD LUCK !! This UPS doesn't have a built in phone line jack :mad:I m using 02 Prolink UPS s and other one which is connected my Computer has a phone jack but it doesn't have an appropriate connector to plug the 02 pin power adapter for the Router.

    What if i but a separate surge protector which can be directly attached to the phone line/cable??wont it be the same as using the in built phone jacks of the UPS? What do you think?
     
    hornet,
    #8
  10. 2008/02/25
    TonyT

    TonyT SuperGeek Staff

    Joined:
    2002/01/18
    Messages:
    9,072
    Likes Received:
    400
    It won't matter if use a separate UPS for the phone. The electrical power in the phone line is external to your house. It appears that when the power is interupted to the neighborhood, the phone company compensates by shifting to an alternate power source which may have a split second delay that's long enough to cause the modem to lose its signal.

    So, all you need to do is have the modem power cord plugged into the UPS and when power is interupted the modem should go OFF and back ON and resynch in a few seconds. If it doesn't then something's wrong w/ the UPS or the modem.

    You may benefit by using a surge protector for the phone line, but don't skimp on price. The quality stand alone surge protectors are not cheap, while most of those 10-50 dollar units won't do much more than give a false sense of protection. You could likely find an inexpensive battery backup w/ a phone jack for about 40 bucks.
     
    Last edited: 2008/02/25
    TonyT,
    #9
  11. 2008/02/25
    hornet

    hornet Inactive Thread Starter

    Joined:
    2008/02/15
    Messages:
    28
    Likes Received:
    0
    Thanks TonyT.But the surprising issue is when there s no actual powercut(meaning when i cut the power from the wall socket-for testing purposes)

    if the phone cable is not connected the Router wont restart loosing all the network connections

    but

    if the phone cable is connected router will re start and refresh the IP, loosing LAN+WAN connections
     
    hornet,
    #10
  12. 2008/02/26
    TonyT

    TonyT SuperGeek Staff

    Joined:
    2002/01/18
    Messages:
    9,072
    Likes Received:
    400
    If removing the phone line from the router-modem causes it to shut off then I'd get a new one. The gateway should stay on to allow lan operability even if the Internet goes off. There may be a setting in the router control panel that affects this.
     
    TonyT,
    #11
  13. 2008/03/01
    hornet

    hornet Inactive Thread Starter

    Joined:
    2008/02/15
    Messages:
    28
    Likes Received:
    0
    Thanks TonyT and sorry for the late reply.

    Can you think of a setting on the router which can cause such behavior(rebooting during a power cut)?I m using purely a wireless network so if you can think of something please let me know.

    This may be a stupid question but do you think rotation interval(related with encryption) has a part in this?I know may advise to set it to a value of 3600 but mines on 0.
     
    hornet,
    #12
  14. 2008/03/02
    hornet

    hornet Inactive Thread Starter

    Joined:
    2008/02/15
    Messages:
    28
    Likes Received:
    0
    Yesterday I purchased a Belkin Surge Protector and plugged my phone lines to it and today during a powercut both the LAN and WAN connections DIDNT got disconnected:):):):):)

    Many many thanks TonyT for sharing your brilliant idea with me.Keep up the good work. ;)
     
    hornet,
    #13
  15. 2008/03/03
    TonyT

    TonyT SuperGeek Staff

    Joined:
    2002/01/18
    Messages:
    9,072
    Likes Received:
    400
    Well done!
    hornet prays for thunderstorms that knock out the electricity!
     
    TonyT,
    #14
  16. 2008/03/03
    hornet

    hornet Inactive Thread Starter

    Joined:
    2008/02/15
    Messages:
    28
    Likes Received:
    0
    HA...HA...HA :D:D:D I think you got your wish TonyT cause we had a huge thunderstorm about couple of hours ago(no power cuts though:)).

    But i disconnected my phone line form the wall socket as i know no matter what protection that I have its not safe to play with good old mother nature when she s angry :p
     
    hornet,
    #15

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Accept Learn More...