?
Solved

static issue with  VOIP phone

Posted on 2010-11-18
6
Medium Priority
?
664 Views
Last Modified: 2012-05-10
Hi,

We are using Alcatel OXE systems in our two campuses of our school. We are experincing some random VOIP static issue between two campuses which are connected via 20M IPVPN.

The VOIP "static" issue has been there for quite a long time, preliminary troubleshooting approaches have reached their limits,but we haven't yet found the root cause of this issue.

QoS settings are in place for both ends.

I would like to your help, tips, direction; any info and help would be hihgly apprecioated.

Many thanks in advance.

Regards

John
0
Comment
Question by:mbsadmin1
  • 3
  • 2
6 Comments
 
LVL 11

Expert Comment

by:jfaubiontx
ID: 34171416
By static, do you mean crackles like an old vinyl record, noise more like a hum or more like a repeating pattern of clicks or pops? We see the crackle like static like that of dust on an old record in VoIP systems mainly due to connection in the analog paths such as handset cords and such. Most hum comes from grounding issues. Things like the server and/or the phone power supply not having an equal ground. Maybe there is a difference on potential between the two grounds. The last type is typically related to jitter issues. Jitter is often caused by timing of the packets in the path. Using MTR or a series of trace routes can help locate the source of these issues.

Jitter Wiki

0
 
LVL 12

Expert Comment

by:atrevido
ID: 34193191
Just to be clear, you are not referring to dropped packets right?  e.g. a dropped word or partial word and intermittent....
Static is different from drops
0
 

Author Comment

by:mbsadmin1
ID: 34279237
To jfaubiontx:
Thanks for your advice, I am organising electricians to check earth grouding for every switch rack and VoIP equipment in both campuses. I will let you know the outcome when the electricians finish their job.  

To: atrevido:
Static means  --- "static like that of dust on an old record"
0
Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 11

Accepted Solution

by:
jfaubiontx earned 750 total points
ID: 34341158
Just following up as I had a customer today with static issues. Their rack was grounded to a nearby water pipe and not to their A/C ground. We had a 400+ milliamps of current between the grounds. Moving the rack ground to the common A/C ground bar cleared up the noise.

Were you able to find anything with the grounding?
0
 

Author Comment

by:mbsadmin1
ID: 34404846
jfaubiontx: Thanks for the follow up. We are in the process of  doing A/C ground for all racks, switches and servers at moment, an electrician will be brought in to carry out this task, I will let you know the outcomes.

Thanks

Regards

John
0
 

Author Closing Comment

by:mbsadmin1
ID: 37143085
We solve this issue by the followings:

1.) earth grounging
2.) Disable STP on Aruba controllers
0

Featured Post

Windows Server 2016: All you need to know

Learn about Hyper-V features that increase functionality and usability of Microsoft Windows Server 2016. Also, throughout this eBook, you’ll find some basic PowerShell examples that will help you leverage the scripts in your environments!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Article by: user_n
How Sip Phone (User Agent) works and communicates with sip servers 1.  There is a sip server and a sip registrar.  The sip server and sip registrar can be one server or two different servers. The sip registrar is the server on which it is record…
Don’t let your business fall victim to the coming apocalypse – use our Survival Guide for the Fax Apocalypse to identify the risks and signs of zombie fax activities at your business.
Sending a Secure fax is easy with eFax Corporate (http://www.enterprise.efax.com). First, just open a new email message. In the To field, type your recipient's fax number @efaxsend.com. You can even send a secure international fax — just include t…
Internet Business Fax to Email Made Easy - With eFax Corporate (http://www.enterprise.efax.com), you'll receive a dedicated online fax number, which is used the same way as a typical analog fax number. You'll receive secure faxes in your email, fr…
Suggested Courses

840 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question