Solved

SIP Trunking vs PRI call quality

Posted on 2007-11-15
1
1,688 Views
Last Modified: 2013-12-21
We are currently using SIP trunking with our Asterisk box through a small voip company over a high speed cable connection.  Due to some service problems with our current provider we will be switching over to either SIP over a T1 data line, or a service called OneFlex provided by our local phone company which through an integrated appliance provides PRI's over a T1, but lets us use the bandwidth for data when the PRI's are not in use.  As far as I can tell the quality should be the same as a standard PRI.  So my question is this.  With the T1 lines being basically the same and costs basically the same for 10  lines can I expect better call quality using SIP or PRI's with a high quality card w/ hardware echo cancellation?  Thanks in advance for any input.
0
Comment
Question by:evotsi
1 Comment
 
LVL 36

Accepted Solution

by:
grblades earned 500 total points
ID: 20292494
A PRI channel should be about the same quality as a G711 SIP channel. They both use the same amount of data bandwidth but PRI is basically uncompressed and therefore works with modems and faxes far better. G711 uses data compression effectivly reducing the resolution of the amplitude by using a logrithmic scale. Its not so good for faxes and modems which rely on this but in theory you get a wider frequency response although it is debatible whether this will be noticeable.
0

Featured Post

DevOps Toolchain Recommendations

Read this Gartner Research Note and discover how your IT organization can automate and optimize DevOps processes using a toolchain architecture.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
Asterisk - Elastix - FreePBX - Bind Port vs Extension port 3 66
Auto-Dialers 3 55
VOIP on Smartphones 5 64
voicemail issue - voip 16 10
Every year the snow affects people and businesses. According to the Federation of Small Businesses (FSB), in 2009, UK businesses lost an estimated £1.2bn (http://news.bbc.co.uk/1/hi/business/7864804.stm) because of bad weather. This article was c…
If your business is like most, chances are you still need to maintain a fax infrastructure for your staff. It’s hard to believe that a communication technology that was thriving in the mid-80s could still be an essential part of your team’s modern I…
In this video I am going to show you how to back up and restore Office 365 mailboxes using CodeTwo Backup for Office 365. Learn more about the tool used in this video here: http://www.codetwo.com/backup-for-office-365/ (http://www.codetwo.com/ba…
Video by: Mark
This lesson goes over how to construct ordered and unordered lists and how to create hyperlinks.

895 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

12 Experts available now in Live!

Get 1:1 Help Now