My phones have some settings, which I do not understand. Maybe somebody can help me here:

1. NAT
Nat traversal      enabled, stun, disabled
Nat addr      stun01.sipphone.com
Nat ttl         30


I played with Nat traversal:
enabled: the phone has NO audio, well it was just a white noise for incoming and outgoing calls stun: the phone works fine for OUTGOING calls, but for incoming calls, this phone and the others of the group ring. I pickup and hear nothing, while the other phones still ring. I can use *8# to get the call disabled: all is working, audio for in- and out-going calls, as well I do not "pickup" the phone call.

Why is that so?


2. Register
The fields are set in the phone to:
register port         1720
rtp port               1722

I wonder, why it does not need to have register port on 5060??? If I set it to 5060, no difference.

Again, why?


3. Call type is set to advanced. The other choice would be normal. What is the difference?

bye

Ronald Wiplinger

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