One for the Tandberg Pros

[mazzarak]

(I think)

When calling a Tandberg 2500 v4, I am able to dial P2P with a Viewstation and get 384k, yet when I call from the Accord, it only gives me 4 channels. On closer inspection, when dialling 256k, it uses lines 1 and 3, and when dialling 384 the lines come up

line1
line1 (missing)
line3
line3
line2 (missing)
line2

Can you suggest why the tandberg is producing the lines in this order?
Or is it a Polycom thing?
HELP!

[Slimey]

is there a switch somewhere in the mix from the accord?

[mazzarak]

no, nothing special coming out of the accord, and yes this seems to be the only site it happens with, which leads me to suspect there might be something odd in the config of the system. And yes the lines are in the right order. ;)

[vtjoe]

In BONDING, the channels on line 1 are first established (or whatever channel you dialed into), then the last available lines channels are established. After that, the system works backwards. If you had 6 lines and called into line 1, line 1 would connect, then line 6, 5, 4, 3 and 2.
Try calling from the Viewstation to the Tandberg at 256, it you will notice lines 1 & 3 are the ones that connect. This is correct. However, that does not solve your problem.
I would double check all phone numbers and SPIDS on the Tandberg system. Then try dialing each individual number one at a time. This may give you some clue of what is going on.
Also try turning parrallel dial off on the Tandberg. It is possible that the Accord and Tandberg are dialing to fast for your switch - this is usually true when different channels connect.

[mazzarak]

thanks for the input. some comments:
the site is on France, so SPIDS are not relevant.
the numbers are definitely all correct.
the problem only happens when dialling from the accord to the tandberg.

[trapehzoid]

thanks for the input. some comments:
the site is on France, so SPIDS are not relevant.
the numbers are definitely all correct.
the problem only happens when dialling from the accord to the tandberg.

if its an incoming call to the endpoint, verify the phone numbers for each line are correct. if its always the same line that fails, that helps. If not, its harder because it may be a timing thing or something past the local isdn switch. In france I think they only give 1 number per line right? So I'd try calling the number for that individual line at 128kbs. See if it comes up. Usually (hopefully) that will be your fail point and you can talk to the provider about incoming calls to that line. If it doesn't fail, but fails when you call all the lines together, thats a harder problem, and usually harder to get the carrier to solve.

Another easy isolation test is to call from another system to this system and verify the behavior is the same.

As long as you have the right switch type, and correct localdn numbers in the codec.. it is not a codec issue.

[mazzarak]

Hey !

thanks for the advice, this is dragging, but it's not our problem, thankfully! The client has about 50 rooms, so he's moved it to another room to see if the fault moves with it. Smart move in my opinion.