atcomsystems.ca/forum Forums TDM Business Telephone Systems Samsung Telephones & Systems VoIP OS100 with one way talking...

Ok, we have an OS100 with a 6TRK, Misc3, MGI16, and SVMi-4e card. It is version 2.69 software on the processor card. Installed this system about a month or so ago. The owners of the company have two VoIP phones at their home that they use when they are there to answer calls and make calls on the system.

This is the problem. Sometimes they will be talking at home on their VoIP phones and the conversation is fine for about 5-10 minutes. All of a sudden she can hear the other party but they cannot hear her. Eventually the other party hangs up and even when she calls back, they cannot hear her but she can hear them.

So, I connected a VoIP phone here at the office to their system and have been using it to make calls here and there for the past week. Well, the problems happened here as well. It isn't everytime and it's not always after the same time of being on the phone.

Anyways, anybody have any issues like this or have any idea what it could be?

Sounds like it's not related to the processor but to the MGI card. Possibly a firewall issue on the system side. It may see the constant UDP stream while a conversation is happening and kill it. Try disabling the firewall altogether just for testing to see if it still fails. If not then you know where you need to make the adjustment. Also make sure you have the full range of MGI ports open on the router side.

As benb stated, this is most likely a port issue on the system side. Anytime I have seen this problem, it has been a port issue.

Yeah, what we are going to do is put an IP phone locally where the system is and see if it ever happens there. That will for sure tell us what is happening. I will also disable the firewall while I am there and see what that does.

Ok, this is where this stands. I turned the firewall off, and put a local IP phone at the place. I also put the SMCP1 card, the MGI card, and the local IP phone on a switch all by itself. When it starts to mess up remotely we tell them to go to the local IP phone and try to use the phone. The same problem happens on the local IP phone that is happening remotely. So that eliminates the router from the equation.

Also, when it starts messing up, most of the time when you hang up and try to make another call, it says no MGI channels available. When you wait a few minutes then the issue I guess clears itself up and you are able to make phone calls again. I am pretty sure it is the MGI card...

Sounds like your MGI card is resetting. Watch the lights on your MGI card when you are having the issue. There is a a heartbeat that cannot be interupted between your MGI and MCP. If it is, then you will see an MGI restart where the system is trying to kick the MGI into gear. When it comes back up you have audio again. Secondly, while the MGI is in a reboot, it can potentially knock down audio of a trunk or dli card in an adjacent slot. Its rare and you would only see that during a reboot of the MGI, but possible. I would first check network and find out why MGI is rebooting. Maybe bump your MGI alive timer up a little bit. Prevent that from happening and you will be fine. Or maybe you have a faulty MGI that is resetting as well. I think everything is centered around that.

Let me know on this one.

Interesting. Because it is next to the 6 trunk card. And when it was messing up she has tried to pickup lines from a digital phone when it's happening and the phone lines weren't there. So that is very telling about the MGI card. We have had tons of issues with the MGI card and the phone lines since day one, this would explain that.

We have replaced the KSU, the SCMP1, the Misc3, and the 6TRK card so far. Next thing to replace is that MGI16 card as I am 99% certain that is the problem. I bumped the MGI Alive timer up to 10 seconds to see if that will help anything.

I will let you know what I find...