MTA behind router - bad sound quality but no choice

Posts: 2 · New Forum Member Joined: Jun 19, 2004 Posts: 2

My setup is: 384kbps dsl running straight to a router the MTA plugged into the router and then a clarkconnect box running between the mta and a switch. Whenever internet usage goes up the sound quality goes through the floor and what I was wondering was if the mta was supposed to be allowing itself enough bw in this setup.
I tried setting up delay pools on the clarkconnect box but that doesn't help as I believe all it is doing is taking the spikes of internet use and dividing them into short bursts. (not sure if that description makes any sense but maybe it gives you an idea.)

Thanks,
Sam

Posts: 12 · Vonage Forum Associate Joined: Jun 19, 2004 Posts: 12

well - why do you not plug the mta onto the dsl modem? that's the only way it is supposed to work. of course it does not, at least with the motorola MTA allegedly has a function to reserve enough bandwidth to carry the voice. only, this function does NOT work.

me - i'm curbing my bandwidth now with netlimiter (google for it, it's free) and it does work. i'm behind adsl ~1Mb dwn ~.15Mb up.

Posts: 2 · New Forum Member Joined: Jun 19, 2004 Posts: 2

The problem is that there is no modem. This is sdsl and the line comes straight into the building to the router.

Posts: 12 · Vonage Forum Associate Joined: Jun 19, 2004 Posts: 12

well yeah sounds like that's a tough one. unless you're the admin and can change the router to one of the sophisticated ones in which you can program traffic priorities for different i.p. numbers.

Posts: 66 · Full Forum Member Joined: Dec 15, 2003 Posts: 66

casechopper, you don't mention whether it's you who hears bad voice or the person at the other end of the call.

If it's the other person, that would suggest the Moto's QOS queuing is not working correctly, though it should be working OK as long as all the outbound traffic from your network is going through it.

If it's you who is hearing the bad audio, then there is probably nothing you can do about it except to get the clarkconnect box to limit ibound traffic (impossible if the traffic is UDP). If the site sending you the traffic sends it fast enough to fill your inbound pipe, the Moto can't help that.

Bob

casechopper wrote:

My setup is: 384kbps dsl running straight to a router the MTA plugged into the router and then a clarkconnect box running between the mta and a switch. Whenever internet usage goes up the sound quality goes through the floor and what I was wondering was if ...
....
Thanks,
Sam