Справочник Пользователя для Intertex Data AB IX78

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SIP is a standardized Internet protocol for live person-to-person communication over the Internet. 
VoIP or IP Telephony is just one application where SIP is used. Other applications, such as SIP based 
high quality voice, video, presence, instant messaging and more is expected to be the next large 
usage of the Internet after email and web surfing!  

However, SIP (and other similar protocols) does not traverse firewalls and NAT routers, unless the SIP 
protocol is specifically supported. 

Your ADSL Internet Gate unit has full support for SIP! 

To allow SIP communication to and from clients on the LAN, the ADSL Internet Gate contains a full 
SIP proxy and SIP registrar that dynamically control the NAT and firewall in the ADSL Internet Gate. 
Thus, SIP clients on the LAN can communicate with other SIP clients over the Internet. 

With other NAT routers and firewalls, SIP communication may not be possible, or has to rely on 
unreliable and insecure methods like STUN to try to keep doors open in your firewall. Some of these 
methods for NAT/Firewall traversal also locks to only use SIP with a certain service provider. They do 
not allow you to use the SIP protocol generally. 

The SIP support in the ADSL Internet Gate allows for global and secure SIP communication and 
requires no configuration – it just works! SIP Clients on the LAN just follow the SIP standard. Make 
sure that STUN and other NAT traversal methods are turned off in the SIP clients you use! 

For additional help please click on the question mark 

 visible on each configuration web page. If the 

appearing help text is not sufficient then the “Read more” online links below it might explain further. 

No special configuration of the ADSL Internet Gate is required for SIP clients on the LAN. In the SIP 
Client, make sure STUN and other NAT-traversal functions are turned off. 

Just configure the clients as if they were located on a global IP address and disregard that they are 
behind the NAT/firewall in the ADSL Internet Gate. If there is any “outbound proxy” setting available in 
the client’s configuration you may set it to the local IP address of this unit (by default 192.168.0.1), 
though it is not necessary. SIP clients can register to any SIP servers on the Internet. (Registering to 
more than 5 accounts requires purchase of additional licenses.) 

You find guidelines how to configure various SIP clients and SIP phones by clicking “Using SIP: 
Telephony, Video, Messaging” on the login page of the web interface. 

Your ADSL Internet Gate can also act as a complete standalone SIP server. You can register both 
local (LAN) and remote (WAN) SIP clients to your own unit, enabling global SIP communication 
without using an external SIP server. Note that you can use the internal SIP Server at the same time 
as being SIP transparent and using a VoIP provider’s SIP services! 

You configure your unit to act as a SIP server for your domain on the SIP Switch page, reachable 
from the main menu of the web interface. 

 

Enable Use as SIP server for domain(s) and enter the name of your domain! Then click Save. 

You need to own the domain name you wish to use and the domain name needs to be translated to 
the IP address of your unit by DNS.  

Having done this, you can use SIP addresses like john.brown@example.usesip.com for your SIP 
clients and communicate with everyone else in the open SIP world!