QoS is not simply a matter of having enough bandwidth. In fact, bandwidth is nearly always sufficient these days.
The trick is making sure the voice packets get priority treatment. If you have not done any QoS work on your connection, every time you check your email, or download a website with any amount of graphics in it, or whatever, those things will have as much right to the pipe as voice. Jim > -----Original Message----- > From: Pittner, Zoltan [mailto:[EMAIL PROTECTED] > Sent: November 1, 2006 10:45 AM > To: [email protected] > Subject: [on-asterisk] Sound quality question > > Hello, > > I have my asterisk (trixbox) server set up in my home > environment.The internet connection is through Rogers Cable, > extreme edition, so there is plenty of advertised bandwidth > to both directions. (it is another fact that these advertised > values never live up to their advertised values...) > > The system has two incoming lines, one POTS (Bell) through an > SPA 3102, and another directly from asterisk to Atlasvoice. > When the phone rings, the Digital receptionist announces: > > "Welcome to our telephone system, please hold the line till I > transfer your call." > > Then it rings a predefined ring group. - I know this is long > introduction, but here comes the problem: > > When a call comes in on the VOIP (Atlasvoice line) - I mean > if I call my own number from another land line I hear the following: > > "Welcom. .. our .elephon. ..stem, pleas. ..ld the line ..ll I > transf.. your call" > > Now, I got pissed off for this and I changed the MTU setting > on my firewall, brought it down from 1500 to 1462. For 2 days > it was good, no losses. After 2 days, it is doing that again. > > Also I have an extension in Hungary - on a softphone > (IAXComm) - and I almost all the time hear the same thing > doesn't matter what the MTU setting is. That made me think > that this may be coming from somewhere else not the MTU. > > Do any of you have any idea what might be causing this? > > Thank you, > Zoltan. >
