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Linksys pap2t voice setup

Settings- Cisco/Linksys PAP2t

The Cisco/Linksys PAP2T is a very popular 2 line Internet Phone Adapter or ATA device which can be connected up to your router.  An analog phone can be connected to each of the two phone ports and if enabled with your VoISP the Cisco/Linksys PAP2T will support both lines.  Each phone port operates independently with separate phone service and their own phone numbers, line 1 and line 2.  The Cisco/Linksys ATA can be accessed from connecting a PC and typing the IP address of the ATA into a browser.  To determine the current IP address connect a phone into phone port 1 while the ATA is powered up and connected to your router's LAN port and dial 4 stars **** then 110#.  The IVR will say the IP address which you will need to type in the address of your browser.

Click on the "Admin Login" button near the top right side of the screen, then click on the "Line 1" tab.  The following instructions are typical instructions for line 1.  In most cases you will need only modify a few parameters from the normal factory default settings.



  • Proxy- This is the DNS entry for your sip provider.
  • Display Name- This would most likely be your full name or what you want other parties to see as your caller id.
  • User ID- Enter the phone number that you were given by your VoIP service provider.
  • Password- Enter the password that is assigned to your account.
  • Register Expires- 3600


The Preferred codec drop down box has several choices. Typically G711, which is an un-compressed codec would be the choice, but to conserve on bandwidth you might change Line 1 "Preferred Codec" to G729a. The "Use Pref Codec Only" setting to No would allow the call to negotiate the codec.


Note: The Cisco/Linksys PAP2 or PAP2T does not support usage of simultaneous calls using the G.729 codec.  When one line port uses G.729, the other line port will use G.711.  (Using compression like G729 does is processor intensive and both these ATA models do not have a capacity to handle simultaneous G729 calls.)