IP VC one way only, not receiving

[Giz]

Dear all
I am setting up a Tanberg 6000 (about 6 years old) onto our office LAN
I can call out to a test site but can not recieve any image back.
The call then fails after a minute and says fault 41.
Can anyone help

Regards
Giz

[Sean Lessman]

Dear all
I am setting up a Tanberg 6000 (about 6 years old) onto our office LAN
I can call out to a test site but can not recieve any image back.
The call then fails after a minute and says fault 41.
Can anyone help

Regards
Giz

Probably a firewall issue. The problem is the system on the inside of the LAN is only aware of its own IP address, so when you make a call it tries to tell the far end to send all communications to its IP address which is probably blocked by the firewall -- hence the one way communications. The codec sees that as a failed call and times out, hangs up.

You can do a few things:

1. Port forward all of the necessary ports (you can find these in the TANDBERG and H.323 document found under the support/whitepaper section on www.tandberg.com ) if you have a 'public' ip address on the codec. If its a private address you will also have to turn on NAT support in the codec (details in the manual).

2. Put the codec on the public internet

3. Get a firewall traversal solution such as TANDBERG's Expressway solution

Good luck.

Sean