igor2930 Series User’s Guide 
175
Register via 
If you want to make VoIP call without register personal 
information, please choose 
None
and check the box to achieve 
the goal.
Some SIP server allows user to use VoIP function 
without registering. For such server, please check the box of 
Call without registration
. Choosing 
Auto 
is recommended. 
The system will select a proper way for your VoIP call. 
SIP Port 
Set the port number for sending/receiving SIP message for 
building a session. The default value is 
5060.
Your peer must 
set the same value in his/her Registrar. 
Domain/Realm 
Set the domain name or IP address of the SIP Registrar server. 
Proxy 
Set domain name or IP address of SIP proxy server. By the 
time you can type 
:port
number
after the domain name to 
specify that port as the destination of data transmission (e.g., 
nat.draytel.org:5065
) 
Act as Outbound Proxy 
Check this box to make the proxy acting as outbound proxy. 
Display Name 
The caller-ID that you want to be displayed on your friend’s 
screen. 
Account Number/Name 
Enter your account name of SIP Address, e.g. every text 
before @. 
Authentication ID 
Check the box to invoke this function and enter the name or 
number used for SIP Authorization with SIP Registrar. If this 
setting value is the same as Account Name, it is not necessary 
for you to check the box and set any value in this field. 
Password 
The password provided to you when you registered with a SIP 
service. 
Expiry Time 
The time duration that your SIP Registrar server keeps your 
registration record. Before the time expires, the router will 
send another register request to SIP Registrar again. 
NAT Traversal Support 
If the router (e.g.
, 
broadband router) you use connects to 
internet by other device, you have to set this function for your 
necessity.
None –
Disable this function. 
Stun
– Choose this option if there is Stun server provided for 
your router. 
Manual 
– Choose this option if you want to specify an 
external IP address as the NAT transversal support. 
Nortel
– If the soft-switch that you use supports Nortel 
solution, you can choose this option.