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Linksys SPA3102 - Local Access Number Line

The SPA3102 supports one RJ-11 POTS (Plain Old Telephone Service) FXS port to connect an existing analog phone and 2 100BaseT RJ-45 Ethernet interfaces to connect to a home or office LAN, as well as an Ethernet connection to a broadband modem or router.

The SPA3102 FXS and FXO lines can be independently configured via software controlled by the service provider or the end user so that any Inphonex user can call their virtual number and place a call on the local POTS line.

Connect one Ethernet cable from your SPA3102’s ETHERNET port to the Ethernet port on your computer.

*PLEASE NOTE* Do not connect any other cables to the SPA3102 during initial configuration. (Cable/DSL/Router or Analog phone cables)  If you connect anything other than this one cable, you will not be able to log into the device.

Now we must determine the address for your device so that it can be accessed and configured with you browser. To do this, we will need to find out what gateway address the device has given your computer.

To find the current gateway:



  • Click Start
  • Click Run
  • Type CMD and press <enter>
  • Type IPCONFIG and press <enter>

In the returned list of information please find the section labeled LOCAL AREA CONNECTION and write down the default gateway.



Ethernet Adapter Local Area Connection:

Connection-specific DNS Suffix   
IP Address
Subnet Mask
Default Gateway


Open up the web browser on the computer that is connected to the device and enter in the gateway address given to you.




(where <IP ADDRESS> is replaced by the address that was given to you in STEP 1).

Click on “VOICE” Tab.

Linksys SPA3102 Configuration

Click on “ADVANCED”.

Linksys SPA3102 Configuration

Click on “PSTN Line” Tab.
Linksys SPA3102 Configuration

Modify only the circled items of the following:


Register Expires:   300
Display Name:   Enter your full name.
Userid:   Enter the new virtual phone number that you just added to your account, as mentioned in the note above.
Password:   Enter the password that you chose when you signed up for InPhonex service.

Linksys SPA3102 Configuration

Change the “Preferred Codec” to G729a. Also be sure that the “Use Pref Codec Only” option is set to NO.

Linksys SPA3102 Configuration

Verify that Dial Plan 2 is configured as follows:


Linksys SPA3102 Configuration

Step 7

Change the "VOIP-To-PSTN Gateway Enable" setting to YES.

Change the "VoIP Caller Default DP" to 2.

Make calls!


PLEASE NOTE: When calling into the device from VoIP, you will not hear a dial tone when the PSTN line is ready. Your VoIP phone will show that your call is connected. At that time, dial the number of your choice just as you normally would from your POTS/PSTN phone.

Our Home Phone Service includes Internet phones with free Internet calling and unlimited US and Canada plans. We offer prepaid phone service and International DID numbers using our voice over IP system and an analog telephone adaptor (ATA). The solutions are designed for home phone service, business phone service, call shops, telemarketing firms and cyber cafes. InPhonex is proud to support Internet telephony equipment (IP Phones) including Sipura 2000, Sipura 3000, Cisco 186, Linksys PAP2 and other SIP phone adaptors. We also support Asterisk PBX, Trixbox and offer turn-key VoIP Reseller business opportunities to let entrepreneurs and businesses resell voice over Internet (VoIP) under their brand name.

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