atcomsystems.ca/forum Forums TDM Business Telephone Systems Samsung Telephones & Systems Remote Phone problem

Hi I have an issue with this site regarding remote phones I registered a phone from my office and it was fine I can cycle though all the mgi ports without one fail which proves to me the ports in the firewall are correct,
The problem arises when I take it to any other sites some calls are fine and other have no speech at all, it's also very random as well I can have 10 calls with no speech then every other call works then a bunch of calls that do work, I have tried three different sites and all the same, also from these site I registered it to another system and it works fine.

I talked to Samsung and they said they have come across it before on other sites and it's down to the firewall not passing the voice through correctly even though the ports have been configured.

I am currently asking their IT company to check to see it my office IP is on any allow/white list which would explain why it works and all the rest do not.

Any one else had any issues like this or can shed any light on the subject?

Thanks in advance.

If you are connecting IP phones to a system using the public IP of the system, make sure that ports 6000, 9000, 9001 are all forwarded to the processor IP of the system.

All the ports seem ok going to get some wire shark traces and send them to Samsung.

What kind of system is it and what software version are you running?

It's a 7200 v4.92

If its a MP20s check the rtp ports (MGI & MPS) arent overlapping if you have an OAS in there.

If its an MP20 is your svmi20i overlapping any rtp ports?

Whats the spec of the system?

Attempt to assign MGI ports directly to the phone and see if the problem persists. I have seen this before once and it was the Router causing an issue. For the IP phones to work, you only need ports 6000, 6100, 9000 and 9001 forwarded in the firewall. No need to have MGI's unless you're running SIP on the system. As you say they're all going into the firewall and pointed at the system's internal IP for the processor. I would recommend getting a log of the firewall with the inbound requests from the other IP locations giving you trouble. To see what is going on. If the packets are dropping at the firewall or before.

I'm using a mp 20 with SVMI 20I and have made the ports on the svmi start after the OAS card ports. not been able to get a wire shark trace yet as the on site IT guys in on holiday but their firewall guy is going to run some Logs for me to see if we can get to the bottom of it.

Thanks

I'm using a mp 20 with SVMI 20I and have made the ports on the svmi start after the OAS card ports. not been able to get a wire shark trace yet as the on site IT guys in on holiday but their firewall guy is going to run some Logs for me to see if we can get to the bottom of it.

Thanks

Curious, do you have the white list enabled in settings?