Elastix

Step 1 : Click On PBX

Step 2 : Click On Trunks

Step 3: Click on Add Sip Trunk

Step 4 : Give the Trunk Name and Outbound Caller ID:

Step 5 : Set the Outgoing and Incoming Settings

Outgoing Settings

Example : Trunk Name : DIDX

Peer Details :

Host : Ip Address

Type : Peer

Incoming Settings

Example : User Context : DIDX

User Details :

Host : Ip Address

Type : Peer

Step 6 : Set Registration Setting

Step 7 : Click on Inbound Routes