Hi,
Since several people have suggested to avoid SIP ALG at all costs, I have disabled it and banged my head some more! Without SIP ALG, only one of my Polycom 335s can Register. The other 5 fail. (With SIP ALG they all register fine).
Now I have found that changing:
SETTINGS>SIP>LOCAL SIP PORT> to a UNIQUE port (5066 in this case)
And
SETTINGS>NETWORK>NAT>SIGNALING PORT> to the same UNIQUE port
I got a second phone to REGISTER and exchange calls!
When I say unique port, I mean unique to all the phones on this NAT Router.
My question is “Is that fine?”
I just want to know if there are limitations on the SIP Port number? Are there issues I should watch out for.
Thanks,
Sean
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