Hi there.

We have had a new Samsung Officeserv 7200 system installed recently and it is working fine internally. But we have 1 person who works from home and need this person to have a VOIP phone that connects in through the external NATed IP address.

Our firewall is a Watchguard e10x Edge. All the correct ports (6000-1, 5000, 6100, 9000-1, 5003 etc, and there may be some missing i have not advised) as advised by Samsung are forwarding the MCP.

Also there is a rule that port forward 30000-30064 to the MGI card.

When we connect the external VOIP phone it connects to the VOIP system fine, we can call an internal extension in the office fine and we can also receive calls. The only problem is that we have no voice! its a dead line when you answer the phone.

now we know that all ports to the MCP card are working just fine as it is connecting and you can dial out and receive calls. its just he voice bit so must be something to do with the MGI card connection.

what i did to test if the firewall rules for 30000 to 30064 was working was too open the sys log on the firewall. then from an external PC did a "telnet 33.33.33.33 30000" all the way to 30064. Every one of these ports that i telnet on where permitted on the firewall. so this proves that all ports for the mgi card are correctly forwarding.

for the record we have 1 external IP address and the MGI and MCP card each have their own internal private IP address. On the firewall there is 2 policies which port forward all the specific ports to the correct internal IP address of each card.

Please can anyone help us getting the voice part working on our environment.
best,
myk3