IAD VOIP Megaco

[EricOtt]

Hey guys, i'm using a IAD card to do VOIP (Megaco) on Elite 192 V9.5. Everything works like a charm except for 1 thing. When i'm at the remote location and having a conversation with an outside caller, sounds like the voice/phone works like it's half-duplex. I've tried all sorts of adjustments (Full-Duplex 100M) but i think there all for data. Anyone knows which adjustements or where i can set it up to be more like full-duplex?

Thanks !

 

[ipfreelyallthetime]

Hi,
1) Have you tried a Megaco Station on the LAN? (How is the quality)

2) Can you elaborate on the half Duplex conversation a bit more?

3) What Codec are you using?

Thanks,
Chris

 

[EricOtt]

Hey Chris,

1)I've tried calling internally from a IP Phone at my remote location to another IP phone at the same location, works fine. I've tried from IP phone @ remote to DTH phone @ main location, works great too. Quality is good.

2)If i'm at the remote location, on a IP phone, and having a conversation with an outside caller (basically using the CO's at the main location) It sounds like half-duplex i.e. If you and I are talking on the phone and we count until 10 at the same time, i will not hear you at all but you will hear me. If i stop talking then i will hear you and if i start back again it will cut your speach path off to let me speak. On a regular situation, i would hear you talking/counting at the same time as me.

3)On the IAD card i'm using the default codec, i've tried the other ones and i didn't see much a difference.

Hope the infos are a little more clear!!

Thanks

 

[EricOtt]

BTW I'm using ADSL high speed at 1.5 Mb/s with 2 NEC bluefire router IX2010. There is no computers on the ADSL. It is used only for VoIP.

Thought you should know!

 

[ipfreelyallthetime]

Hi EricOtt,
Sounds like you have a good grasp on things. What Service Pack are you running? We have not had this problems and have about 8 sites deployed with Megaco Stations and have not had this particular problem.

Thanks,
Chris A

 

[EricOtt]

Sorry for being late,

I'm currently running service pack 2 (Did the upgrade from the cd's).

 

[freeness]

Are you using QOS routers on the main site?

Andy

http://www.teleco4.com

 

[EricOtt]

I'm using the NEC BlueFire IX2010 routers at both the main and remote site. I'm also on dedicated DSL circuits 1.5 MBs

 

[Travelman]

You have probably checked this already but you need to make sure that all the Ethernet Hubs in the path are switches not repeaters.

 

[rship72]

Try the new IAD firmware that enables the echo training mode via the phone. I'm not real familiar with the IAD yet but I noticed that posted on NTAC today.