Quickstart guide to your settings:

Server settings:
Core SIP server...........sip.DDI2.net
SIP control port...........5060
Domain name..............(not used) (also known as Realm)
STUN Server...............stunserver.org (192.245.12.229 : 3478)
(We advice not to use a STUN server as the SIP protocol should resolve NATed ports,
. but in case you do experience issues making calls from a NATed network you could try this one)

UA settings:
Username...................your DDI2.net SIP number
Password....................your DDI2.net password
Display name..............your DDI2.net username (also known as Friendly name)
SIP control port...........5060
RTP Voice ports...........10000 - 32767 (Some UAs start RTP from port 10000, we start at 16384)

Making a call:
to another DDI2.net user: enter the callers SIP number;
from DDI2.net to another VoIP Provider: put the SipBroker prefix before the number;
from another VoIP Provider to DDI2.net: put *9900 before your DDI2.net SIP number;
to a landline number: put two leading zeroes (00) before the full landline number,
.. eg: calling landline number 1234567 in Rio de Janeiro (21) in Brasil (55) would be: 00 55 21 1234567
.. also see the FAQs for additional important information on selecting DO gateways!

Test the gateway:
To check if your connection works and that you can access all VoIP Providers:
- Dial *0111 88888; You should hear a welcome message.
- Dial *266 300; If you hear the monkey sounds, then domain-to-prefix mapping works.

*) Further details and additional advice can be found under the DevicesHow2 and FAQs menu tabs.