Solved

Terrible call quality

Posted on 2009-04-08
5
348 Views
Last Modified: 2012-05-06
-We have a main office with satellite offices.
-The main office has a Nortel switch, with a PRI (coming in from verizon).
-The main office has VPN tunnels to the satelite offices (ASA 5505)
-Every office has Avaya 4610 ip phones.
-The remote sites have Avaya gateways.

The call quality over the tunnel is just horrendous. Cutting out, static, jitter.  Our phones are in a different network than our data, so we did some class-map policies to prioritize the network (see below).

Any ideas?
One of our satellite offices:
 

class-map VOICE

 match access-list voip-traffic

class-map VOICE2

 match dscp ef

class-map inspection_default

 match default-inspection-traffic

Open in new window

0
Comment
Question by:dissolved
  • 3
  • 2
5 Comments
 
LVL 7

Expert Comment

by:ehatchell
Comment Utility
What type of network connection do you have between the two sites?  What information do you have on your network statistics (round trip latency, etc)?
Are you using ASA's on both ends for the tunnel?  What model are the GW's and switches?  What else are you running on this network?
0
 

Author Comment

by:dissolved
Comment Utility
Both ends are ASAs. The connection from headquarters------------->internet  is a T1
The connections from remote sites ---------------->internet is dsl

The switches are extreme networks PoE. The only other thing on this network are the user's computers. The sites have probably 10 people each.

Not sure on model of gateways. Just inherited this network. I'll check on round trip
0
 
LVL 7

Accepted Solution

by:
ehatchell earned 500 total points
Comment Utility
Can you verify the DSL speed?  How about stats on the T1... Any detailed historical data available?
0
 

Author Comment

by:dissolved
Comment Utility
768kbps my man

I can pull detailed historical data tomorrow. The ping response time varies greatly. I lowered the aes encryption from 256 to 128. Hoping that helps
0
 
LVL 7

Expert Comment

by:ehatchell
Comment Utility
Ideally, you want round trip latency in the 150ms or less realm at all times... if it varies greatly, I would start with why, and gate your connection to also account for control traffic as applicable on your network.  I think 768k is fair enough for voice, but over the internet it could be spotty as its not controlled.  So, get some monitoring up and going, let's better understand what is traversing your network, how stable it is, and let's even see sans the regular network traffic is we can get it to stabilize for voice as throwing in QoS on a DSL connection that is crap is just throwing time down the drain.
0

Featured Post

6 Surprising Benefits of Threat Intelligence

All sorts of threat intelligence is available on the web. Intelligence you can learn from, and use to anticipate and prepare for future attacks.

Join & Write a Comment

Although VoiceOver IP has been around for a while, internet connections have only recently become fast enough to provide good call quality. Now, VoIP has become a real option for businesses looking at ways to improve their business model. In this ar…
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…
Illustrator's Shape Builder tool will let you combine shapes visually and interactively. This video shows the Mac version, but the tool works the same way in Windows. To follow along with this video, you can draw your own shapes or download the file…
This video shows how to remove a single email address from the Outlook 2010 Auto Suggestion memory. NOTE: For Outlook 2016 and 2013 perform the exact same steps. Open a new email: Click the New email button in Outlook. Start typing the address: …

772 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

11 Experts available now in Live!

Get 1:1 Help Now