sundance-communications.com/forum Forums TDM Business Telephone Systems Samsung Telephones & Systems WIP handset one way audio

Trying to get a 5100 handset to work at my house w/ standard AT&T U-Verse router, registered to our office 7100, public IP on a Motorola 3347 DSL router. I can get it to register fine, but get one-way audio(I can hear who I'm talking to on the WIP handset, they can't hear me). Same problem on intercom and outside calls. ITP sets work fine. Do the WIP phones need anything different to work in this manner?

I believe the WIP phones require port 8000 in addition to the regular ports required by the ITP. Not sure if this is causing your issue or not.

Port 8000 is the signalling port, if this wasn't forwarded then the handset wouldn't register.

Sounds like the MGI/MPS ports arn't forwarded.

You say that ITP sets work, is this from another location or your house?

It could also be the router blocking the outgoing voip packets (i've seen the opposite (no incomming) caused by DoS protection in a router)

ITP sets work from my house, directly plugged into the U-Verse router. The strange thing is my office switch is on a public static ip on the 3347, I would think no ports would be blocked at all.

Your going to have to get a wireshark trace to see whats happening.

Getting it from your home end will be tricky as from what i can see your router is an all in one, so there is no where to sit across the wire and do the trace, maybe AT&T tech support can do one and send it to you

I just tried another ITP set to make sure I'm not crazy and yes, they work fine. No audio issues. I then set up and registered a second WIP handset and it has the same problem as the first. Guess I'm going to have to try this on someone else's wireless connection and see if its my home U-Verse router, or the Motorola 3347 at the office. I guess I could call AT&T and see if they can help.

Thats odd as they use the same ports for speech regardless of ITP or WIP, I know when I upgraded the software and setup remote WIP, all I did was add UDP 8000 to the MP card for the port forward and it just worked

During WIP registration procedure you need to choice nonSIP mode if you are calling under NAT. Did you make it? Wireshark it is really very useful advice for understanding what is going on....

Ok, borrowed a wireless connection from one of my customers and still have the same problem.

Klerik, yes nonsip is chosen during registration.

I know the Motorola 3347 has some sort of built in firewall, not sure why it would block on a public address though.

I am running 4.30i on the office 7100, maybe upgrading to latest will fix this?

I downloaded and installed Wireshark, but I have no idea how to use it. Can someone give some pointers?