Bonding/Un-Bonded call failure?

[Airwave1]

Hi,

Got a strange one for you all, hopefully someone can shed some light!

I'm making a call from site A using ISDN6 to another site, B.
Site A has a sony PCS 1600 site B has a Tandberg 880 and also a Sony PCS 1600 (I tried both units).

When I make the call using an unbonded ISDN 6 call, ie I input all 6 numbers to be dialled, the call will only connect at ISDN 2.
If I make the call as a bonded ISDN 6 call, ie I enter only the first number to dialm, the call connects through on ISDN 6 with no problem.

I should also add we use a VPN conection between the two sites telephone systems.

I'm lost as to what this is!!!

Thanks

[BPVTC]

Seems like one of these 2 codecs does not support H0 Dialing. This maight be an option which needs to be loaded in the Sony or some setting in the Tandberg which needs to be modified.

Does the call work fine in both cases when the other site calls the Sony unit?

[Gary Miyakawa]

Do these systems have BRIs or a PRI connected to it ?


Also, is the area code on ALL lines the same ? (must be for Bonding to work).

More info will help !

Gary Miyakawa

[trapehzoid]

h0 is PRI only.. none of the units he listed support PRI.. so H0 is out of the question.

I really don't understand the question though.. why on earth would you dial all 6 numbers? That's what bonding is for! I don't know what the Sony is trying to dial when you enter 6 numbers.. but if its trying 6xH221.. no one supports that kind of stuff anymore.. so I doubt the tandberg does.

What is the real issue? Can't connect at full rate if you just dial one number?

First thing to do is check the ISDN numbers programmed into each unit and verify you have no typos. Then check the ISDN numbers DIALED by the originating system as it does its calls and make sure the numbers being dialed match what the far-end expects to answer.

Then Dial the lead number on each BRI seperately as a 128kbs bonding call and let the call connect. Make sure a 128kbs bonding call can be made to each line.

If that works, start building by doing bonding across two BRIs.. then three.. etc. You'll see a pattern that either specific lines can not be bonded.. or you can only bond a max # of channels regardless of the lines you use.

[Airwave1]

I will try this out then.

Here is some more info though:

ISDN 6 connected to the unit.
With the sony if you ask for a 6B call (ISDN6 Bonded) and any one or more of the channels at either end fials the whole call will fail as it will only connect if ISDN6 is avaliable. It is for this reason that when we enter the regularly used numbers into the phonebook we put all six numbers in individually, that way if one or more lines are busy/unavaliable the call will connect through on what is.

Thanks for the help so far!

[robertk]

I will try this out then.

Here is some more info though:

ISDN 6 connected to the unit.
With the sony if you ask for a 6B call (ISDN6 Bonded) and any one or more of the channels at either end fials the whole call will fail as it will only connect if ISDN6 is avaliable. It is for this reason that when we enter the regularly used numbers into the phonebook we put all six numbers in individually, that way if one or more lines are busy/unavaliable the call will connect through on what is.

Thanks for the help so far!

Tandbergs will only support 2X64 H221 calls (OR none bonded) Sony can do 6x64. This is ancient and not supported anymore by most vendors. In Tandbergs case I belive they just choose not to support it, as most others also did as ALL new systems support BONDING. Tandberg has also improved on the BONDING protocol with DOWNSPEEDING. (I belive sony supports Downspeeding too but I might be wrong as I'm no Sony fan :)

As you say, if connecting using bonded calls, one line goes down the call will collapse. However ALL Tandbergs support DOWNSPEEDING and the call will reconnect automatically on the new lower connection rate. You can argue here that the h221 6X64 will keep the call up even though a channel is dropped, but then you are limited to dial mostly sony equipment. (And keeping a phonebook 6 times as thick as neccesary :)

However, having channels drop on you is something you should take up with your ISDN service provider.

Hopes this clarify things a little.

//Robert

[Skylark]

Well this is a strange problem but why do you need to do a non bonding call if bonding is working?