ip traffic between 2 switches..succession 4.0 install problem

[deelee74]

I have a hospital that has 2 option 11's that we upgraded to Succession systems. The 2 systems are in the same building.
One system is expanded to maximum capacity, and the other is going to be used for adding more extensions to the building. The customer wants to bridge the systems by using Voip.

They have another 4 option 11's on this network and are eventually adding an 81C to it.

Right now, we are having a couple of peoblems with the Voip to and from 1 switch.

Each system has a signalling server and 1 VGMC card.

We were able to call between the switches for a while, but lately it doesn't work.

I noticed today that when you try to place a call from the problem switch to another the VGMC card on the problem switch changes from follower status to master status as if the signalling server has crashed. You get a fast busy.

Then if you disconnect and reconnect the Tlan side of the VGMC, the card will go back to follower again. Another test call makes it go to master again.

I don't know for sure what to check. I do know that the signalling server doesn't reboot. It seems to continue to run.
We have good voip traffic between the other elements on the network, just nothing to this one switch.

Any ideas what would cause this to happen??? The settings are not different on this switch than any of the other ones. We were assuming that it was a problem on the Customer's lan side. Their IT department assures us that it is our problem. It has been passed back and forth.

Another problem is that seems to be occurring across the whole voip network is that outside callers that are transferred from one switch to another cannot hear a ringing tone after the transfer occurs. The phone physically rings at the hospital but the caller doesn't know it. They tend to hang up sometimes thinking that they were hung up on.
I noticed this today when i was transferred from one office to another.
Is there a setting that turns this on or off? Is it on the telco side or the it side?

thanks
-eric

 

[sl1input]

I take it you use an NRS/GK to route calls between SS. I assume the 2 sig servers are programmed as endpoints in NRS on both SS.

Check in the NRS for the endpoints being registered.

Re-create the fault then take a look to see if its still registered in NRS. Also when its fallen over try pinging all 3 IP addresses e.g TLAN - NODE - ELAN.

If unable to ping add's this could be your problem i.e. network.

Hope this helps

 

[teekow]

I would also check the Link Speed and Duplex settings on the switch ports, VGMC NICs, and Sig Server NICs. The fact that the VGMC shows master indicates a definite problem with the Sig Server. I would try to make all sides set to Auto Negotiate. If one is set to Auto and the other side is hard coded to 100meg Full, you will have problems. Usually this comes up when an IT department has their switch ports hard coded and the VOIP gear is set to Auto Negotiate.

Cheers
Rob