atcomsystems.ca/forum Forums TDM Business Telephone Systems NEC Telephones & Systems NEC SL1100 over VPN

I'm very green when it comes to this phone system, no I did not turn it off, it is currently set to Dynamic

Nat transversal needs to be off.

I thought we had this issue resolved. I turned off NAT traversal.
Extension to extension calls work fine
We can dial and receive calls, but the audio is not being passed across the VPN

Setup
Local Router 10.1.10.x
Site to Site VPN via Cisco RV320
Remote location 192.168.3.x

Phones in remote site
IP address of 10.1.10.x
Gateway is IP address of Router at local site
Nat Traversal Disabled
Sip Server is Local SIP server 10.1.10.x
RTP & Self SIP ports are set to even numbers out of range or conflict

Any idea what I am missing?

I see no mention of the IP address for the DSP resource, you will not have audio if one has not been configured.

Does this need to be set on the phone? Extensions were working fine before we put them behind the VPN.

If it was working before the VPN means the DSP resource was setup, see 84-26-01 for IP address

Have you contacted Cisco about this issue?

Look in 10-58 to make sure your local network (VPN etc) is defined. It's probably trying to send the packets via NAT like it's been programmed to do.

192.168.0.0 255.255.0.0 etc if you are on a 172.x.x.x or 10,x,x,x these need to be properly defined.

There is nothing defined in 10-58

Just to be clear before I make this change to the PBX programming

in 10-58 I should have


IP address #1
10.1.10.0
255.255.255.0

IP Address #2
192.168.3.0
255.255.255.0


10.1.10.x is my PBX
192.168.3.x is my remote network


?

This basic IP routing 101. The only 3 you need that should cover everything is:

10.0.0.0 sub 255.0.0.0
172.16.0.0 sub 255.240.0.0
192.168.0.0 sub 255.255.0.0

I think you should read the manual first before you get too far or better off hire Certified Installer to do it for you.
If you still feel like messing with it watch this video