Testing Line Quality 1

[Infenro]

We currently have 3 new Avaya IP Office systems, 2 of which are working perfectly and 1 is having odd call quality issues,

Calls across the network to our other sites are fine, but when trying to call external numbers or external callers coming through we are getting a crackling on the line and the sound at which people hear us differ from being load to being very quiet,

The setup on all 3 sites are identical and we have had the isdn30 tested and they say there are no faults, but when on a call there is a crackling and white noise in the background,

As a last resort I will be trying to disconnect the ip office from our network and use a standalone switch to test the quality on to rule out our network but seeing as the other sites are fine and there is only phone data on these switches I don't see how it can be the cause.

Are there any system settings we can tweak or look at to try and get to the bottom of this, we have taken of the comfort noise and are using the G.729 codec.

Any help would be appreciated

 

[amriddle01]

The tests they do remotely are very limited and don't show much up apart from major issues with there downward link interface to the NTE, they can't test anything on the interface that talks to the system. It will be the lines/NTE I'd wager

ACSS (SME)
APSS (SME)

http://www.ipoffice.tel

 

[Infenro]

We had a guy come in with some ISDN testing equipment and he plugged into the line with the PDQ machine (as thats what it looks like) And tested the line and said it was clear as day so he then said it was the system or our network,

He never found anything on the system to cause it so was leaning toward blaming the network.

BT also cleared the line as being fine, BUT as you say these are remote tests and I used to work for an ISP and know the tests mean nothing, even when they say there is a fault on there own test BT don't believe you.

Are there any system tests we can do like plug in a phone into the IP office directly to rule out the network, or would I need to disconnect it to do further testing on a separate switch.

Thanks

 

[amriddle01]

If you have a power brick you can configure the second Lan port to allow a handset to register and provide an address etc and connect directly to that with the handset

ACSS (SME)
APSS (SME)

http://www.ipoffice.tel

 

[Infenro]

Nope we dont have any power bricks,

Looks like I will have to do it with the other switch,

Another question kind of related to the quality issues we are having, people sound very quite on outgoing calls, on my mobile I had to turn up my sound to hear the person in the office when with a normal call I don't have too.

Is there anything we can do to increase the volume of the microphones or any tweaks anyone know that we can do?

 

[amriddle01]

If the volume internally is fine it isn't the handsets, again this issue is more than likely on the lines, you don't have any gain settings on ISDN so there isn't much to be changed on the system

ACSS (SME)
APSS (SME)

http://www.ipoffice.tel

 

[amriddle01]

Thanks for the star, I am not ruling out that it could be the PRI(U) card in the system, but my experiance with BT over the years is they just lie to you until you really stamp your feet then they will usually come and fix it, but maintain there was never anything wrong in the first place and still attempt to bill you, you need to keep on at them and watch them like a hawk when/if they turn up.

To avoid a possible bill you could try swapping the card with a known worker during closed hours, before getting back on at BT

ACSS (SME)
APSS (SME)

http://www.ipoffice.tel