Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

Terrible call quality

Posted on 2009-04-08
5
377 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
ID: 24100334
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
ID: 24101578
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
ID: 24101957
Can you verify the DSL speed?  How about stats on the T1... Any detailed historical data available?
0
 

Author Comment

by:dissolved
ID: 24103230
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
ID: 24109561
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

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
Mac OSX 10.6 integration with OpenCom 130 telephone System 4 64
Asterix (Elastix) Dial plan "-" 4 56
Cisco CUCM 10.5: password recovery 2 83
VOIP System 9 100
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…
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…
Two types of users will appreciate AOMEI Backupper Pro: 1 - Those with PCIe drives (and haven't found cloning software that works on them). 2 - Those who want a fast clone of their boot drive (no re-boots needed) and it can clone your drive wh…
In a recent question (https://www.experts-exchange.com/questions/29004105/Run-AutoHotkey-script-directly-from-Notepad.html) here at Experts Exchange, a member asked how to run an AutoHotkey script (.AHK) directly from Notepad++ (aka NPP). This video…

828 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