# IP-based Configuration
First, begin with adding an IP to your account by logging in to your DIDforSale Customer Portal.
Follow this link for steps on how to add an IP to your account :
{% content-ref url="/pages/-LVecbBQ7vvnQ1PnAeOD" %}
[Adding IP Address](/sip-trunking/ip-configuration.md)
{% endcontent-ref %}
Now, login to your 3CX web portal to configure the trunks.
To create a SIP trunks, click on SIP Trunks>Add Sip Trunk. Select country as **Generic** and providers as **Generic** **SIP** **Trunk**. Enter the Main Trunk No as your DID number as shown below and click on OK.
**Step 2**: In the next window, **add Registrar/Server/Gateway Hostname** or IP as **66.209.76.70** **and SIP server port** as 5060(which is next to hostname) and **Outbound Proxy** as **term1.didforsale.com**. Under Authentication, select "Do not require-IP based" as **Type** **of** **Authentication,** as shown in the image given below:
**Step 3**: After Scrolling Down, select the destination to which the DID number should be forwarded in your 3CX system. You can send the calls to an extension, voicemail, fax or to an external number.
**Step 4**: Once the above step is done, scroll to the top of the screen and click OK.
**Step 5**: Let's create a second trunk same way with **Registrar/Server/Gateway Hostname** or IP as 66.209.15.72, **SIP server port** as 5060(which is next to hostname) and **Outbound Proxy as** term2.didforsale.com. Select T**ype** **of** **Authentication** as "Do not require-IP based" as shown in the image below:
**Step 6**: Select the desired destination.
**Step** **7**: Scroll up and click on OK.
**Routing Outbound Routes**
**Step 8**: The next step is configuring Outbound routes for this trunk. Click on Outbound Rules on the left pane of the window and then click on Add. The window below appears.
**Step 9:** Enter the **Rule Name** as dfs\_out (or anything you want). For **Calls from extension(s)** enter 000. Under Calls to **Number with a length of** 10 as the number length.
**Step 10**: Under Make **outbound calls on,** for **Route 1** Select **Generic SIP Trunk**(the sip trunk you created before). Enter 1 for **Prepend**
**Step 11**: Once everything is done , Scroll up the same window and click on **OK.**
**Routing Inbound Routes**
**Step 12:** Go to the Inbound routes option on the left window. Now, click on Add DID Rule as shown in the figure below:
**Step 13**: Give any name to this Inbound Rule, say "dfs". Under **Route calls to** option you can route calls as per your requirement to an extension, voicemail, fax or to an external number. Refer the image below for better understanding:
**Step 14**: Scroll up the same window and click on OK.
For a detailed description of how to add this IP to your DIDforSale account, take a look at this documentation [here](/sip-trunking/ip-configuration.md).
*Hope this document helps. Please reach us for any further queries.*
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