User Manual

592N TELEKOMUNIKACE a.s., www.2n.cz
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SIP proxy (GSM IP) – the SIP proxy IP address to which gateway turns 2N BRI
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in the case of GSM incoming calls.
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
gateway operates in the Internet. You are recommended to complete this BRI
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field if gateway is installed in a private network separated from the2N BRI
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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
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gateway public IP address. Use this parameter to configure the frequency of BRI
queries routed to the STUN server.
Tones generated to VoIP
Ring tone to VoIP – enable generation of a user ring tone or transfer of the real
ring tone from the GSM/UMTS networks.
Tip
If you keep the default values (0.0.0.0), gateway will receive2N BRI
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requests from any IP address.
Tip
You can use the domain name for the Registration domain (realm) SIP
, and IP addressesproxy (IP GSM) SIP proxy (GSM IP) SIP registrar
on condition that you complete the domain name Registration domain
and set the properly in the (realm) DNS server address Web
section. The and configuration Ethernet configuration SIP proxy
IP addresses must be set to the default value (0.0.0.0).SIP registrar
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 analyzer tracing (WireShark –
).www.wireshark.org
Refer to for easy tracing by the BRI gateway.Subs 5.1