Calling many SIPs at a time

I have two soft phones connected to my asterisk.They have the same username.And I want to ring them together when a user dial an extension.Is it possible?And if yes is it called sip trunking?How can i do it?


[1000abc] type=peer externip= localnet= nat=yes qualify=no allow=all udpbindaddr= bindaddr= secret=mysecret host=dynamic context=incoming-call

You will need to make the resource names different, or use static addresses.

externip should be in general.

You use the & in the Dial application dial string, to dial multiple devices as one extension.