2N IP series - Page 80

Configuration manual for 2N IP intercoms
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SIP Transport Protocol– set the SIP communication protocol: UDP (default), TCP or TLS.
Lowest Allowed TLS Version –define the lowest TLS version to be connected to the
devices.
Verify Server Certificate – verify the SIP server public certificate against the CA
certificates uploaded in the device.
Client Certificate –specify the client certificate and private key used for verifying the
intercom’s authority to communicate with the SIP server.
Local SIP Port– set the local port to be used for SIP signalling. The parameter is not
applied until the intercom is restarted. The default value is 5060.
PRACK Enabled– enable the PRACK method for reliable confirmation of SIP messages
with codes 101–199.
REFER Enabled–enable call forwarding via the REFER method.