Hook Switch failure on 7941G phones in areas with no climate control

I have had an unusual amount of failures on some cp-7941G sets. The Hook switch starts to not function properly after a short time (couple of months). I have had three in just the last week. These phones were located in either a warehouse or guard shacks. We have also experienced this problem at another site near an indoor pool. We thought it might be humidity related. TAC says they have had no reports of this. We took one apart and tinkered with the hook switch this corrected the issue but only for a few days. Has anyone else seen this type of issue?

Hi Tim,
We have had a fair number of Hookswitch problems with 7940's and 7941G's. This is the most common hardware failure we have experienced. You have probably seen this Tech note;
Cisco Unified IP Phones 7900 Series
Best Practices for Cleaning and Troubleshooting Cisco IP Phone Hookswitch
http://www.cisco.com/en/US/products/hw/phones/ps379/products_tech_note09186a00801c0810.shtml
This is the salient point of the article that applies 9 times out of 10;
"If none of the solutions above remedy the situation, Return Material Authorization (RMA) the phone."
We have found that the best (most reliable ) phone to use in the area around the indoor pool was a 7912.
Hope this helps!
Rob
Please remember to rate helpful posts........

Similar Messages

  • How to disassemble a 7942 phone / clean hook switch

    Hello,
    does anyone have a guide how to disassemble a 7942/62 phone without damaging it?
    Would be nice to know for example to clean the phone or to repair / replace hook switch.
    Thanks,
    Bernhard

    Hi Bernhard,
    I just took apart a broken 7942 to test the method, but
    it seems like they may have changed the design at some point
    as this one had 9 screws on the back and a plastic clip on the side
    housing to the left of the Hookswitch. It seems like your 7942 may be
    more like the method described here
    http://atc.go0se.com/?p=1034
    Cheers!
    Rob
    "When it comes to luck you make your own  " 
    - Springsteen

  • My signal is not great but when I go an area with strong signal I have to switch my phone of and on to get signal

    My signal is not great but when I go an area with strong signal I have to switch my phone of and on to get signal

    Hey Andyjosh,
    It sounds like you're experiencing a slow data connection over cellular coupled with an intermittent cellular data connection whenever you move to different areas, so I'd check out the following article which might resolve the issue:
    iPhone: Troubleshooting a cellular data connection
    http://support.apple.com/kb/ts3780
    Best,
    David

  • I just signed up for Verizon 45 days ago and am unhappy with my service? I have decided to switch to another service provider. Are there any other cancellation fees on top of the $350 per line fee? Am I stuck with the phone?

    I just signed up with Verizon 45 days ago and am unhappy with my service. I know about the ETF fee of $350/ per line but are there any other fees I will need to pay for the actual phone.

    There are no other fees. You are not stuck with the phone, you can do whatever you would like to do with it.

  • Switching to AT&T Cingular - best phone for use with Mac and iSync

    Dear Friends,
    I am finally about to be free from Sprint's poor customer service. I will be switching to AT&T / Cingular. (Not quite ready to buy an iPhone, but don't want to be locked into a 2 year contract with another provider).
    I want to use Apple's iSync. I have reviewed the list of compatible devices and scanned the forums for related topics.
    I'm still left wondering:
    What is the best phone to get with AT&T for use with iSync?
    I would like to sync contacts both ways. If possible, syncing cal events and to-dos would be nice, but not as important as contacts.
    I prefer small flip phones. I don't plan to buy the Media pack service that includes text, web, etc. Instead, I will use the phone for calls and occassional text messages.
    Sound quality and the ease of use are the most important features for me. I prefer raised keys to the flat keypads, but could give on this if need be.
    Finally, using the phone as a modem with my laptop would be nice, but is not essential.
    Thanks so much for any help you can offer.
    David

    I am facing the exact same question regarding, e.g., the Nokia 6126. There are several references:
    1. Go to the Nova Media web site and look at their new product, Fone Link. Or their iSynch Plugins
    2. One of the forum threads references, http://www.macosxhints.com/article.php?story=20060915154526806
    3. Another link I found http://soapbox.co.nz/past/2007/4/9/nokia-6126-and-isync-revisited/
    But what I don't yet understand is whether or not any of these suggestions/solutions are affected by the carrier. My understanding is that the 6126 is the North America Version of the 6131. But I talked to ATT/Cingular support yesterday and they make some modifications to the phone software. They don't know if the ATT 6126 will synch with a Mac. Of course they know the answer if synching with a PC (!!)

  • My at@t service won't switch to my new phone

    I just upgraded to the new iphone 4s and all the apps info and everything synced but my at@t service won't switch to the new phone? 

    So why are you posting in an Apple technical support forum?  Call AT&T!

  • I have an iphone 4 with a talkmobile contract sim. I am unable te send or receive mms. I have spoken to talkmobile customer service, my phone settings are correct. Aplle say that it is a network problem, can anyone help?

    I have n iphone 4 with a talkmobile contract sim. I cannot send or receive msm. I have spoken to talkmobile customer service, my phone settings are correct,Aple say it 8is a network problem!! Help!!

    talkmobile is not a supported carrier. It's very likely that you have the same problem suffered by people who attempt to use T-Mobile in the U.S. MMS simply will NOT work because the network is not compatible with the iPhone. If you want full functionality, you will have to switch to a supported carrier.
    A list can be found here: http://support.apple.com/kb/ht1937

  • Preparation For Switch Failure?

    I've been tasked by my IT director with developing a plan for when a switch fails at our two locations. Redundancy and HA aren't part of this plan. Instead, I've been asked to focus on replacing a failed switch with an identical appliance. We have three 3560G 48 port swtiches in one locaiton and seven 3750Gs at our other location. We've purchased one of each as a backup. I understand the method of configuring the replacement switches in the event of a failure, but what I'm stuck on is developing a plan that presents the quickest most efficient and clean process. We do have room in our rack at the location utilizing 3560G switches, but no room in the rack where the 3750s are housed.
    How have you planned for switch failure? What are the best practices?

    Ok, let me give you a "funky" method which incorporates two processes:  Zero-Touch SmartInstall and EEM.
    Let's start with the easy part:  EEM
    For this process to work, you need to have a non-MS TFTP server.  Linux/Unix is preferred because of the way the files are written.  This EEM script is invoked when someone saves the config of your appliance.  When this happens the appliance will automatically send a copy of the configuration to the remote TFTP server of your choice.  The filename will be named is this syntax:  Switch_name-Month-Day-Hour-Minues-Second-Timezone-version
    Another thing, if no one has saved the config for a week, then the switch will still copy the startup-config to the TFTP server of your choice. 
    Ok, here's the script:
    archive log config
       logging enable   hidekeys path tftp:///$h- write-memory time-period 10080
    Ok, now this solves the problem of an "updated config".  Next, the replacement.
    There's a process called Zero-Touch SmartInstall.  What this does:
    1.  You have a new switch, fresh from the box, no configuration whatsoever;
    2.  You connect the new switch to the Director (explained later) via the ethernet port;
    3.  You power up the new switch and YOU DO NOTHING;
    4.  The new switch will talk to the Director.  The Director will provide the new switch with an IP Address (via VLAN 1).  The Director determines that the new switch does not have a config and running an IOS with is not "standard".  The Director will push the config to the new switch's startup-config (the running-config still empty) and then the IOS will get pushed to the new switch;
    5.  The new switch will reboot with the correct IOS specified and a full-working configuration.
    Ok.  So let's run the scenario.  You have a failed switch at either one of the sites.
    Using the above EEM, you have a full-blown working config.  The latest one to boot!
    The site with a dead switch has a switch capable of being a Director and a TFTP server.  So you copy the working config from your TFTP server to the Director.  Configure the Director switch.  Cisco sends the replacement unit to the site (instead of your location).  You instruct the person on-site to connect the new switch to the Director and power up the switch.  New switch gets the working config and an IOS upgrade/downgrade.
    All in all, your new replacment switch is ready in 30 minutes.  Tops.

  • While updating ios bymistakenly i switch off my i phone 5 how can i re update ios

    while updating ios bymistakenly i switch off my i phone 5 how can i re update ios

    Hey there Ajimosco,
    You may need to restore your iPhone in order to proceed through the update process again:
    Use iTunes to restore your iOS device to factory settings
    http://support.apple.com/kb/ht1414
    If you are not able to restore using the steps in that article, try using the information in this article to help you achieve this goal:
    If you can't update or restore your iOS device
    http://support.apple.com/kb/ht1808
    Thanks for coming to the Apple Support Communities!
    Regards,
    Braden

  • I can't get some song on my iphone they work off of the computer but they wont show up on my phone they are in the "on my iphone" section but they gray and have a gray dotted circle next to them i have tried every thing I just want them on my phone HELP!

    I can't get some song on my iphone they work off of the computer but they wont show up on my phone they are in the "on my iphone" section but they gray and have a gray dotted circle next to them i have tried every thing I just want them on my phone HELP!!!

    You have posted to the iTunes Match forum, which your question does not seem to be related to. Is your question concerning iTunes Match or syncing with iTunes via USB?

  • I tried to sync music from iTunes to my iPhone and when I click on "on this phone" the songs are there, but they are greyed out and have a circle in front of them.  I can not click on those songs and when I eject the phone they are not on the phone.

    I tried to sync music from iTunes to my iPhone and when I click on "on this phone" the songs are there, but they are greyed out and have a circle in front of them.  I can not click on those songs, delete or anything and when I eject the phone they are not on the phone.  I tried to re-add the songs and it says it can't add songs because they've already been added.  So HOW can I get the songs to actually ADD to my phone to where I can listen to them?  It's like they're stuck in Sync limbo or something!  Any help would be greatly appreciated.

    I am having the same problem. I have just tried this. Unplug iphone > open itunes > delete all music from itunes library > close itunes > re-open itunes > add music from original folder > plug in iphone > select songs > press sync > unplug iphone using eject button onscreen > checked phone .... still nothing in music folder on phone. On itunes the "On this iphone" tab the songs remain there but greyed out.

  • All my contact are being copied to my friend's iphone and i also am getting his contacts on my phone,when i delete a contact it also deletes it from his phone,we are sharing the same apple ID. How can i stop our contacts from being shared between us

    All my contact are being copied to my friend's iphone and i also am getting his contacts on my phone,when i delete a contact it also deletes it from his phone,we are sharing the same apple ID. How can i stop our contacts from being shared between us

    Everything that you have checked in your icloud settings will be shared between devices using the same Apple ID.  If you don't want icloud to share that information, then simply turn off that process under settings > icloud

  • My folders in my email accounts are not on my phone?  Only with one email address are they.

    My folders in my email accounts are not on my phone?  Only with one email address are they.       Any reason why?

    Care to share which OS, email client & versions you are using?
    iOS is for mobile devices. 

  • Help! I synced my iCal from my old iPhone to iCloud. It worked great. I've done this because I'm switching to a Samsung phone and need to sync my iCal to my Google calendar. In attempting to do so today, my iCal is empty. How can I retrieve my iCal info??

    Help! I synced my iCal from my old iPhone to iCloud. It worked great. I've done this because I'm switching to a Samsung phone and need to sync my iCal to my Google calendar. In attempting to do so today, my iCal is empty. How can I retrieve my iCal info??

    This was EXACTLY what I needed about the purchases I made from my device. However, is there a way to re-download other ones you've made from a computer? Because I realized some of them were not just purchased from my device.
    This is a picture of what it looks like now:
    http://tinypic.com/r/107quxu/7
    As you can see, the stuff circled in red doesn't give me an option to download from Cloud Beta because it already says "downloaded".
    any way to get around that?

  • Can you switch to alternate phone on line with edge payment?

    I have a need to temporarily from time to time switch to an alternate phone on a line I currently have Edge payments on.  I will continue to keep and use the phone I'm making edge payments on, but if I take the SIM out and put it in another phone for a few days, will that affect my monthly Edge payments?  I won't be putting a different SIM in the phone I'm making payments on.
    Anyone have experience with this?

    lewisr13 and mrhelper thanks for the responses.  To clarify, I have an iPhone currently on a line with edge payments being made on that phone.  I may temporarily from time to time need to switch to an Android phone on that line.  I would like to keep making Edge payments on that iPhone and not have to pay it off all at once if I switch to the other phone temporarily.  I have no plans to put the iphone on another line during that time and that Android phone won't be purchased via that line or any other line on my account.  It would be simple swapping of SIM from iPhone to Android phone and back.
    I'm just trying to avoid getting hit for the whole cost of the iPhone at once and prefer to keep my monthly Edge payments for it...that's my primary goal or what I want to understand.

Maybe you are looking for