video teleconferencing problem

[gregster1]

Hello,

I recently had a VTC system installed by a contractor. We are having difficulty terminating and initiating video calls.
I have a G3si running Rls 1.1.3. The configuration is as follows:

A PRI from the pbx to a Ascend imux 3000 provisioned for 6 channels the balance are OOS.
From the IMUX to a Tanberg 6000 codec.

I can dial out directly from the IMUX and watch it dial up a bonded 384K connection and the IMUX appears to be happy.
But when i go back to the codec(Tanberg 6000)and try to dial the same call it almost never completely established a call, yet the IMUX shows all 6 channels connected.
On those few occasions i only get voice with no video. and after the call appears to be up i start getting corrupted data messages. Again i never get any video.
I get these same conditions rather i call a loopback number or a actual system.

My question is because the inter-connect between the pbx and the imux is a PRI is there any special provisioning that needs to take place in the pbx to allow a video call to correctly operate?

Also when i do a list trace to watch the imux dial i only see it seize one member in the outbound trunk-group.
But when i watch the IMUX dial i see it dial all 6 channels.
one at a time until all 6 are bonded together and get a ONLINE status.
Shouldn't i see it grab each trunk member as it dials? Or is the last 5 channels transparent to this trace?
I status the trunk and see all member active.

Also is there any 1-800 number video loopback numbers that are available for testing?

Sorry for rambling.

Any feed back would be greatly apreciated

 

[mike144]

what version is this??

 

[gregster1]

Mike,

I'm running Multivantage 1.1.3

Regards,

Greg

 

[mike144]

on the switch side, is the tanberg hooked BRI or DCP.

 

[gregster1]

Mike,

Are you talking about the segment between the ascend and the tanberg?
Thats not a BRI connection. It uses the RS-449 connection (I could be wrong on the RS protocol) off the ascend and then connect's to a a matching set of eastern researh video line drivers.
Which in turn connect to the tanberg. We have the pri comimg from PBX set up to act like a PRI coming from a LEC which then connects to the ascend imux 3000

Please note: I have 2 systems that connect back to the ascend. one is a tanberg and the other is a polycom unit. I get the same syptoms with both units.

Regards,

Greg

 

[lopes1211]

Why are you using the Ascend? Why not terminate the PRI directly to the 6000?

-CL

 

[gregster1]

I need to be able to encrpt my video and data before it goes out onto the PSTN.

 

[gregster1]

I failed to mention the encrption device sits between the ascend and the tanberg. This device is currently bypassed to eliminate it from the equation.

Regards,

Greg

 

[lopes1211]

The 6000 also has triple des encryption.

-CL

 

[gregster1]

I agree. However it doesn't meet DOD spec's

 

[lopes1211]

Can you call from local unit to local unit to eliminate the LEC temporarily? Also, be sure the itc value in the route pattern is "both" and not "rest".

-CL

 

[gregster1]

Due to the design ( it was never built to two site up at once) i not able to call my other location. I have a a/b box that i switch between my other site.

I did check my route pattern. It is provisioned like you mentioned.

I'm at a loss here. I hate to have the tanberg vendor show up to find it's my pbx that having the issue.

Greg