IP based

1. IP based chan_sip configuration

Step 1: Login to your freepbx admin interface. Go to connectivity>Trunks> click on +Add Trunk option. Under that select ADD SIP(chan_sip) Trunk. A new window will appear. Enter the Trunk Name as “didforsale_1” and add the trunk Parameter as shown in image below:

In the same window, click on Sip Settings. Under the Outgoing tab, enter the Trunk Name as “didforsale_1”.

type=peer 
context=from-trunk
 disallow=all
 host=209.216.2.211
 allow=ulaw
 nat=yes
 canreinvite=no
 insecure=very
 dtmfmode=rfc2833
 qualify=yes

Once all the details are copied, click on Submit.

Step 2: Create a second trunk for inbound with Trunk Name as “didforsale_2” and add the trunk Parameters as shown in below image:

In PEER Details copy the following details: 
type=peer
nat=yes
insecure=very
host=209.216.15.70 
dtmfmode=rfc2833 
disallow=all 
context=from-trunk 
canreinvite=no 
allow=ulaw

CREATING OUTBOUND TRUNK

Step 3: Go to Connectivity >Trunks and select the option Add SIP Trunk>Select ADD SIP(chan_sip) Trunk. A new window will appear. Enter the Trunk Name as “DFS_out_1” and add the trunk Parameter as shown in below image:

In the same window, click on Sip Settings. Under the Outgoing tab, enter the Trunk Name as “DFS_out_1”. In PEER Details copy the following details:

host=209.216.2.212
nat=yes
insecure=very 
dtmfmode=rfc2833 
disallow=all 
context=from-trunk 
canreinvite=no 
allow=ulaw 
type=peer

Click on Submit button.

Step 4: Create a second trunk in the same way with Trunk Name as "DFS_out_2” with the below PEER Details:

type=peer
nat=yes 
insecure=very 
host=209.216.15.71 
dtmfmode=rfc2833 
disallow=all 
context=from-trunk 
canreinvite=no 
allow=ulaw

Refer image below for better understanding:

Click on Submit button.

ROUTING INBOUND DID

Step 5: For routing your inbound calls coming on your DID number, click on inbound routes and configure the DID with prefix 1. Toll free numbers needs to be configured without 1. Say your DID is 949 885 9944 then you will configure the DID with 19498859944 in the inbound routes. Delete existing routes for the DID and then reconfigure from scratch. Here is the image for inbound setups:

Click on Submit button.

Routing Outbound Routes

Step 6: For routing your outbound calls. Go to connectivity>Outbound Routes. Click on Add Outbound Route button (as shown below).

STEP 7: You should be viewing the Route Setting tab. Under that, give the Route Name. Select which trunks this outbound route will use, and in what order. Choose the trunk(s) which you have created ,DFS_out_1 and DFS_out_2 from the drop-down menus next to Trunk Sequence for Matched Routes.

STEP 8: Click the Dial Patterns tab. Click Dial patterns wizards. In preprend enter “1” and for match pattern enter “NXXNXXXXXX”. For better understanding refer the following image:

Click on Submit button. Also press APPLY CONFIG (on the top right corner).