2N NetStar Admin manual - Manual (Page 61)

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Common parameters
Port – here fill in PBX port for the SIP Proxy – terminal communication.
Realm (Domain) – defines the domain over which the gateway communicates.
The domain and ports specified here help route calls to the gateway. The
Realm(Domain) + port items are checked in the Request–URI field for incoming
INVITE messages. If the setting matches the SIP Gateway setting, the packets
are routed to the gateway. The INVITE messages whose Request–URI items are
included in the Alias field are served too.
Via/Contact – here define the contents of the Via and Contact headers. The
following options are available:
IP address – fill in the PBX IP address.
FQDM – fill in the PBX Hostname as entered for the PBX IP interface.
NAT – fill in the public IP address and NAT port for the opponent's sending
of signalling messages. Packets are routed to the PBX according to the port
routing and router IP address settings.
STUN – enter the STUN server address and port for finding the current
address behind the NAT.
Authorisation required – use this option to enable authorisation for all
terminals. Logins and passwords of the users whose extensions are assigned to
the given terminal in the
tag are used for registration. Extensions
Send congestion tone – enable transmission of the congestion tone from the
PBX or network in case the opposite subscriber hangs up.
Proxy parameters
Registration validity – use this parameter to define the validity for terminal
registrations. Every terminal has to send a new registration request upon expiry. The
parameter range is 30 to 3,600s. The resultant registration term may be shorter than
the value defined here (depending on the terminal setting).
RTP interface
Name – shows the name of the Ethernet interface used.
UDP min – here define the lower limit for the UDP ports used for RTP stream
sending.
UDP max – here define the higher limit for the UDP ports used for RTP stream
sending.
NAT – enable RTP stream routing through the NAT. If this selection is No, the
opponent's RTP stream is sent to the VoIP interface. If a PBX is configured behind
the NAT, one of the options in this menu has to be used for the VoIP interface to
send a correct IP address to the WAN.
NAT source – if you have entered the fixed IP address in the NAT column, now
fill in the NAT IP address here for RTP streaming.
NAT base – if you have entered the fixed IP address in the NAT column, now fill
in the NAT port here for RTP streaming.