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Cisco 7961 Headsets on UC520 System Not Working, Speakerphone Works Fine

Posted on 2016-09-22
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Last Modified: 2016-10-13
I'm working with a Cisco UC520 system. The phones are mostly 7961 and 7961GE. My problem is that a few of them have the headsets not always working. However, the speakerphones works fine.

They previously worked without incident. All that was done was to change the associated extensions. Originally 3 had this issue. One phone suddenly started working out of the blue. I know these phones are known to have hardware issues, but is there anything that can be checked from a settings or configuration aspect?
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Question by:masnrock
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Expert Comment

by:arnold
ID: 41811947
See whether the issue is related to the wire connecting the headset to the phone.  Experienced similar issues with different cisco phones, possible cause the variance in the impedance of the wire.
i.e. an of the shelf longer phone wire was used to connect the handle to the phone and they had issues, they could hear what was being said, but the other side could not hear them.

Working/notworking only one side can hear, or neither can hear.

If not mistaken, there is a special function button on these phones to activate the headset unless it is connected through the handle.
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Author Comment

by:masnrock
ID: 41816746
I'm working on this system remotely, so I can't see what's truly going on. Fortunately, the office manager asked for the phone number of a phone to be changed, so I can see if things work out for that line.

Both ways in the convo are fine, it's just that the headset doesn't work.

But I remembered hearing about a way to programmatically turn the headset function on and off. Was wondering if anyone knew what the might be.
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Expert Comment

by:arnold
ID: 41817006
Are you able to connect to the phone via its ip? 10.1.10.x for the ip of the phone, ...
Otherwise, it has to be adjusted directly on the phone.
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by:masnrock
ID: 41817039
I couldn't see anything that I could configure. But I did change the extension associated with a phone. Will give more info tomorrow.
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Expert Comment

by:arnold
ID: 41817088
Changing the extension is a configuration push from the pbx, the auto-on for headset is, I believe, a local phone config that can only be done by directly accessing the phone config via the IP the phone has.
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Author Comment

by:masnrock
ID: 41817870
When I went to the IP of the phone itself, there was nothing for me to configure. Just a display of several settings. In terms of the PBX itself, I've been configuring using Cisco Configuration Assistant.
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Expert Comment

by:arnold
ID: 41818049
I do not believe the CCA prvides for the controls you are looking for. You could download the phone BIN/config or using CLI though still do not think from the PBX you can force the headset function on. if not mistaken, that would be eqivalent to forcing phone off hook.
The other option, is to tie the headset as an alternative to the handle with the device that would trigger the off hook event (lift handle)......
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Author Comment

by:masnrock
ID: 41818072
Well, I did reconfigure the one phone last night, so I should know tomorrow whether it just may be a matter of the 2 phones themselves. Just odd for things to act so weird.

I just read this whole thing after reading your last comment and noticed I should've been saying handset the entire time, not headset.
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Assisted Solution

by:arnold
arnold earned 500 total points
ID: 41818709
Oh, So the user picking up the handset hear nothing? That would be the reverse, or the issue with the phone to handset cable not being "cisco" impedance variances. not have not heard of a situation where if there are several extensions mapped on the phone that some work and others don't
Presuming it is not a typo/error designation instead of marking the line as a voice line, is marked as a monitoring line,etc. so while it flashes/rings it can not be answered.
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Author Comment

by:masnrock
ID: 41818764
Correct, they pick up the handset and hear nothing. However, the speakerphone is perfectly fine. Supposedly, these phones were working fine before changing the extensions that they are associated with. Calls can be made and picked up without incident as long as the speakerphone is used. Ringing, dialing, and so on were never issues.

3 phones were done the exact same way on the same day, and all initially had the same problem. However, after changing the extensions again, then back to the correct ones, one phone started working.

My changes basically compromised of 3 things, all done from CCA:
  1. Changing the extension
  2. Changing the name associated with extension
  3. Creating a voicemail box

Office manager insists that all 3 phones worked normally before changes were made. Since I'm 3 hours out of town, I have no way to verify. However, one of the phones that still has an issue is used by an employee who has been active the entire time.

The idea of the cords did come to mind, but I had her check the button on the phones first to make sure that it's not an issue of it coming off hook improperly.
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Assisted Solution

by:arnold
arnold earned 500 total points
ID: 41818817
Try checking the cord between the phone and the handset.  I do not see how an assigned extension would have such behavior, but have seen such behavior when one used a longer cord from the phone to the handset and the cord had an adverse effect on the functionality of the phone, the remote side could hear them, but they could not hear anything .......
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Author Comment

by:masnrock
ID: 41826688
No news from the office manager, who has had some things going on that kept her out of the office. Will update ASAP.
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Accepted Solution

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masnrock earned 0 total points
ID: 41834978
Nothing more has gotten said, which means that things must be working. Thanks for the assistance.
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Author Comment

by:masnrock
ID: 41838298
You're going to laugh, but the office manager had reported that she got them working by hitting the handset button.
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Author Closing Comment

by:masnrock
ID: 41841648
Things started working without any reasonable explanation. However, the advice provided should be helpful in some similar scenarios in the future.
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