> For the complete documentation index, see [llms.txt](https://prosbcdocs.telcobridges.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://prosbcdocs.telcobridges.com/configuration-details/configuration-by-use-case/sip-registration-forwarding/configuring-sip-registration-for-regular-nap.md).

# Configuring SIP Registration for regular NAP

A regular NAP is a NAP with a specific Proxy address (either IP address or FQDN from 3.1 onward). Configuring SIP Registration for a regular NAP requires no extra steps. A NAP that accepts SIP registration must be a Registrar. A Registrar accepts SIP registration requests from ProSBC after ProSBC receives the request from a remote SIP end point that wants to register on the registrar.

You must configure SIP Registration Domain(s) for your regular NAP and associate them with the regular NAP (Registrar).

To create a new NAP:

1- Click NAPs in the navigation panel

<figure><img src="https://docs.telcobridges.com/w/images/3/38/NAP_NavigationMenu.png" alt=""><figcaption></figcaption></figure>

\
2- Click Create New NAP

<figure><img src="https://docs.telcobridges.com/w/images/2/26/Create_New_NAP_SIP.png" alt=""><figcaption></figcaption></figure>

\
3- Create the new NAP:

* Enter a name for the NAP
* Click Create

<figure><img src="https://docs.telcobridges.com/w/images/b/b4/SIP_Server_NAP_Create.png" alt=""><figcaption></figcaption></figure>

\
4- Verify that the NAP was successfully created message appears

<figure><img src="https://docs.telcobridges.com/w/images/f/f0/Create_New_NAP_SIP2.png" alt=""><figcaption></figcaption></figure>

5- Associate a SIP transport server with the new NAP:

* Select a SIP Transport Server from the Available list
* Click "<<" to associate the LAN\_SIP\_TS with the NAP

<figure><img src="https://docs.telcobridges.com/w/images/3/33/SIP_Server_NAP_Create_1.png" alt=""><figcaption></figcaption></figure>

6- Enter SIP Server proxy address:

<figure><img src="https://docs.telcobridges.com/w/images/6/65/SIP_Server_NAP_Create_2.png" alt=""><figcaption></figcaption></figure>

7- Associate a Port range with the new NAP:

* Select a port range from the Available list
* Click "<<" to associate LAN\_Vlan:0 Port range with the NAP

<figure><img src="https://docs.telcobridges.com/w/images/1/14/SIP_Server_NAP_Create_3.png" alt=""><figcaption></figcaption></figure>

8- Associate a SIP Domain with the new NAP. If you have more then 1 registrar domain using the same registrar you can associate all of them with the NAP:

* Select a sip domain from the Available list
* Click "<<" to associate the SIP Domain with the NAP

<figure><img src="https://docs.telcobridges.com/w/images/8/81/Open_NAP_Create_3.png" alt=""><figcaption></figcaption></figure>

\
9- Configure settings for the following parameter groups as required:

* Registration Parameters
* Authentication Parameters
* Network Address Translation
* SIP-I Parameters
* Advanced Parameters
* Click Save

<figure><img src="https://docs.telcobridges.com/w/images/1/12/SIP_Server_NAP_Create_4.png" alt=""><figcaption></figcaption></figure>

* Note: If you are using multiple registrations to the same destination with different ports, you must add the port number in the Address to register too.

<figure><img src="https://docs.telcobridges.com/w/images/2/2c/Different_port.png" alt=""><figcaption></figcaption></figure>


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