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Device Configuration Guides
Linksys SPA3102 - Standard VOIP Line

The SPA3102 supports one RJ-11 POTS (Plain Old Telephone Service) FXS port to connect an existing analog phone or fax machine. The SPA3102 also supports one PSTN FXO port to connect to a Telco or PBX circuit. The SPA3102 includes 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.

Installed by the end user and remotely provisioned, configured and maintained by the service provider, each SPA3102 converts voice traffic into data packets for transmission over an IP network. Compact in design, the SPA3102 can be used in consumer and business VoIP service offerings including a full-featured IP Centrex environment. The SPA3102 uses international standards for voice and data networking for reliable voice and fax operation.


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 the "Admin Login" button near the top right side of the screen, then click on the
"Line 1" tab.

Linksys SPA3102 Configuration

You need to modify only a few parameters from the factory default. They are listed here:

Display Name:   Enter your full name, this will show up as part of your callerid.
User ID:   Enter the phone number you chose when you signed up for InPhonex service.
Password:   Enter the password that you chose when you signed up for InPhonex service.
Register Expires:   3600
Linksys SPA3102 Configuration

Change the “Preferred Codec” to G729a. Also be sure that the “Use Pref Codec Only” option is set to NO. You can do this for both Line 1 and PSTN (i.e. if you are going to use PSTN).

Linksys SPA3102 Configuration

Make calls!


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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