2N StarGate/BlueTower v5.2 User Manual
Page 73
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IP Addresses
– required IP address of the VoIP card of the connected gateway.
VoIP board
SIP proxy (IP–>GSM) – the SIP proxy IP address from which 2N StarGate /
®
awaits the GSM outgoing call requests.
BlueTower
Tip
If you keep the default values (0.0.0.0), 2N StarGate /
®
will receive requests from any IP address.
BlueTower
SIP proxy (GSM–>IP) – the SIP proxy IP address to which 2N StarGate /
®
turns in the case of GSM incoming calls.
BlueTower
SIP registrar – SIP registration server IP address.
NAT firewall – NAT firewall IP address.
STUN server – STUN server IP address (Simple Traversal of UDP through NATs
(Network Address Translation)) for obtaining the public IP address with which 2N
operates in the Internet. You are recommended to
StarGate / BlueTower
®
complete this field if
is installed in a private
2N StarGate / BlueTower
®
network separated from the Internet via NAT or firewall. The pre–set port for
sending requests to STUN is 3478.
Next STUN request (60–6553, 0=off) [s] – update of information on the 2N
public IP address. Use this parameter to configure the
StarGate / BlueTower
®
frequency of queries routed to the STUN server.
Note
In case the GSM gateway is installed behind the NAT, make
proper routing settings in the NAT router for the relevant ports
(SIP, RTP, STUN). Integrated firewalls can also affect VoIP calls!
Tip
Should you have call troubles (such as unilateral audibility,
connection errors), make sure that all the active elements on
the VoIP call route have been set properly. For easy
troubleshooting, try the point–to–point connection with the
software IP phone (SJ phone, e.g.) in your PC and, at the same
time, apply network analyser tracing (WireShark –
Refer to the
subsection for easy tracing by
2N
®
.
StarGate / BlueTower
Tones Generated to VoIP
– generate a ringing tone of your own, or transmit a real
Ring tone to VoIP
ringing tone from the GSM/UMTS networks.