Linksys PAP2

The Linksys PAP2 is a reliable inexpensive telephone adapter that works with the Net Servicing when placed behind your broadband internet router.

Most other Linksys and Sipura VoIP products (such as the SPA-xxxx series) are based on the same software as the Linksys PAP2; so you may also use the PAP2 setup guide to assist you with those products as well.

The PAP2 product page and user manual can be found here.
The most recent PAP2 firmware (software) version can be found here.

The information below is based on the PAP2 firmware version 3.1.3(LS); although most other older and newer versions will look very similar.

These instructions are based on using the PAP2 in its factory default configuration which is to obtain a dynamic IP address automatically from your router using DHCP, which is how most people have their home routers configured. For information on configuring your PAP2 with a static IP address, please refer to the PAP2 user manual.

We recommend that you read each step through in its entirety before performing the action indicated in the step.


Connect your router with the supplied Ethernet network cable to the PAP2. Now connect your phone to the PAP2 Line 1 port. Finally plug the supplied power cable into the PAP2.


Wait 60 seconds after plugging your PAP2 in.


Pickup the phone connected to the PAP2 and dial the * key on your phone 4 times.


Have a pen and paper ready. You will hear a message - "Configuration menu. Please enter option followed by the pound key...", then enter 1 1 0 # on your phone. You will now hear a message giving you the IP address of your PAP2 such as - " write this number down.


Open a web browser on your computer such as Internet Explorer and enter the IP address you heard in step 4 as the address (I.E. where you would normally enter
Please note: some browsers will require you to remove leading zero's ( 0 's ) in the IP address. For example if you heard "" you should change this to "".


Please note, the PAP2 by default does not have a password assigned to it, so you should now see a page that looks like this:

If you are prompted to enter the username and password please enter it and you should see the image above.


Now click on the "Admin Login" link as indicated in the picture below:


Now click on the "(switch to advanced view)" link as indicated in the picture below:


Click the tab labeled "System" in the menu at the top:


Enter time servers and DNS servers as indicated below:

  1. Set your Primary DNS server to a public DNS server such as You can also set yourSecondary DNS server to a public DNS server such as

Click the "Save Settings" button after you have entered the time servers. The web page will display a screen for a few seconds stating that it is saving the changes you made.


Click on the SIP tab from the main menu.

Scroll down to SDP Payload Types section.

Set the following values:

RTP Packet Size: 0.020
G729a Codec Name: G729
G729b Codec Name: G729

Click the "Save Settings" button once you are done to save these changes. 


Click the tab labeled "Regional" in the menu at the top. You will now be shown the Regional page. Scroll to the bottom of the Regional page. In the "Time Zone" field select the number of hours plus or minus that your local time is offset from Greenwich Mean Time (GMT).

Click the "Save Settings" button after you have selected the time zone.


Below we outline the steps assuming the use of Line 1.

Note: Now we will setup the line you will use Net Servicing with. Normally if you are using the PAP2 only with Net Servicing you would use Line 1 by clicking the "Line 1" tab which is how the example below is shown. If you already have another provider configured on Line 1, use Line 2 instead by clicking the "Line 2" tab. You may also configure Net Servicing on both Line 1 and Line 2 by first setting up Line 1 following the directions below; and then repeating the step identically but in the "Line 2" tab.

Click the tab labeled "Line 1"


Within the Line 1 page is where most of the settings will be configured. Below is a list of the settings that need to be changed from the default configuration; you can click the screenshot below to see the full page of settings in detail.

Setting Value
NAT Mapping Enable yes
NAT Keep Alive Enable yes

Setting Value
Proxy Enter in this field
Outbound Proxy Enter in this field
Use Outbound Proxy yes
Use DNS SRV yes
DNS SRV Auto Prefix yes

Setting Value
User ID Enter your Net Servicing number here (your Net Servicing number starts with 1567 and has an additional 7 digits)
Password Enter your SIP Password here. Your SIP password is the same password you create when you sign up for you Net Servicing account. Optionally you may change it in your preferences.
Auth ID Enter your Net Servicing number here (your Net Servicing number starts with 1567 and has an additional 7 digits)
Use Auth ID yes

Setting Value
Preferred Codec G711u
DTMF Tx Method Auto

Within the Dial Plan delete ALL of the current setting and replace it with the following by copying the text below and pasting it into the Dial Plan field:

Click the "Save Settings" button after you have finished entering all information on the Line 1 page.


At this point your PAP2 should be registered (connected) to our servers. You can verify that your PAP2 is successfully setup in ANY of the following ways:

  • Click the "Info" tab in the top menu. Under the "Line 1 Status" section on the Info page you should see "Online" next to the "Registration State" field.
  • The light next to the Line 1 on the front of your PAP should be on.
  • You should have dial tone on Line 1 when you pickup the phone.
If you do not see your PAP2 as registered, you should re-verify all steps in the setup process above. Make sure you have entered all settings correctly.


That's it! You can now make a phone call.

1 + the area code and number for calls to the US
011 + the country code, area code, and number for calls worldwide (you may also use 00 instead of 011).