VOIP quality issue: voice breaking up

Posted on 2012-09-05
Last Modified: 2012-10-02
Hi Experts,

Since both our facilities were installed with the same model of voice IP phone system (Samsung OfficeServ) a year ago we've continuted having the voice breaking-up issue while calling between the two facilities using four-digit extension. Both facilities have a connection of 3 T1s and reserve dynamic cQoS 1,536K for public voice and another 768K for site-to-site phone.

I want to know if the breaking-up issue on VOIP is "normal"? And we should live with it? What could be the cause and how to fixt it?

Question by:Castlewood
    LVL 36

    Accepted Solution

    The voice breaking up is definetly not normal. It can happen if you make calls over the internet if some packets get lost but over a dedicated connection with QOS configured the call quality should be perfect.

    How many simultaneous calls do you have between offices?
    768Kbos should be good for about 8 simultaneous calls and more if the voice is compressed using a different codec. If you have many calls then it could be the bandwidth you have reserved is not enough. It should be easy to test by just calling at a very quiet time of the day.

    Author Closing Comment

    The telecomm told us, if you have choppy voice, it most likely is caused by the layer one (cable quality). The street copper to our facility has been old and we suspect it contributes most to the issue we have.
    If drop-off, then it could be layer 2 or 3 issue. Since it is on-going issue we have been working tightly with isp. Pretty much every time user got an issue and reported to me, then I called to isp and created a case. Hopefully can work out.

    Featured Post

    How your wiki can always stay up-to-date

    Quip doubles as a “living” wiki and a project management tool that evolves with your organization. As you finish projects in Quip, the work remains, easily accessible to all team members, new and old.
    - Increase transparency
    - Onboard new hires faster
    - Access from mobile/offline

    Join & Write a Comment

    In my office we had 10 Cisco 7940G IP phones that were useless as they were showing PROTOCOL APPLICATION INVALID when started. I searched through Google and worked for a week continuously on those phones, and finally got them working. This is a di…
    I recently purchased a Bluetooth headset called the Music Jogger (model BSH10). The control buttons on it look like this: One of my goals is to use it as the microphone and speakers for Skype calls. In that respect, it works well. However, I …
    To add imagery to an HTML email signature, you have two options available to you. You can either add a logo/image by embedding it directly into the signature or hosting it externally and linking to it. The vast majority of email clients display l…
    Internet Business Fax to Email Made Easy - With eFax Corporate (, 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…

    746 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

    Need Help in Real-Time?

    Connect with top rated Experts

    20 Experts available now in Live!

    Get 1:1 Help Now