How to configure Linksys SPA3102 without a hassle

Last modified: September 13, 2021

Linksys spa3102 voip configuration

Linksys SPA3102 VoIP Configuration

GENERAL INFORMATION
The Linksys SPA3102 is a device similar to the Linksys PAP2/T line of devices in appearance and configuration. In addition to the similar appearance, the Linksys SPA3102 also adds extra features not present in the PAP2/T such as an FXO (Foreign Exchange Office: allowing you to use a normal PSTN line or PBX line for redundancy in case of an outage on your ISP…etc) and a built-in router allowing you to share your internet without the need for a standard router/switch. The Linksys SPA3102 is reliable and relatively inexpensive and can be considered by individuals who want the extra PSTN functionality for their specific environments. Linksys SPA3102 RESOURCES
The configuration information below is based on firmware version 5.1.7(GW), which is the latest version as of this writing. Before we proceed please make sure that your Linksys SPA3102 is powered on and that you have an ethernet (RJ45) cable connected with one end to your router/modem/gateway and the other end to the blue port on the back of the Linksys SPA3102. You will also want to connect a regular telephone (RJ11) cable to the phone port labeled “Phone”. Once you have verified this please continue configuring your device with the instructions below. We recommend that you read each step through in its entirety before performing the action indicated in the step. STEP 1a If this is your first time configuring your Linksys SPA3102 then you will need to first find the IP address of your device and then enable HTTP configuration. To do so have a pen and paper ready to write down the IP address. Once you’re ready do the following:  
  1. Pick up your telephone handset
  2. Dial ****, do this even if you hear a busy signal
  3. You will hear a message – “Linksys configuration menu. Please enter option followed by the pound key…“, then enter 1 1 0 # on your phone.
  4. You will now hear a message giving you the IP address of your PAP2 such as – “192.168.001.100“. Write this number down 
Do not hang up yet, as of now you will need to enable web-based configuration since by default the web-based configuration for the WAN port is disabled. To enable web-based configuration: You will hear the menu prompt again after acquiring the IP address. After hearing the prompt dial 7932# followed by 1# then 1 when asked to save the change. You should now have the IP address for your Linksys SPA3102 as well as the ability to configure your device through your web browser. Continue onto Step 2 below.   STEP 1b If you have already enabled web configuration you simply need to acquire your device’s IP address in order to configure it. If your computer is not connected to the yellow port on the back of the Linksys SPA3102 then please do the following:  
  1. Pick up your telephone handset
  2. Dial ****, do this even if you hear a busy signal
  3. You will hear a message – “Linksys configuration menu. Please enter option followed by the pound key…“, then enter 1 1 0 # on your phone.
  4. You will now hear a message giving you the IP address of your PAP2 such as – “192.168.001.100“. Write this number down 
Else if your PC is connected to the yellow port on the back or your Linksys SPA3102 then the SPA3102 IP should be 192.168.0.1, unless you changed the subnet in your advanced configuration. Once you have acquired your device’s IP continue on to Step 2 below.   STEP 2 Now that you have your device’s IP address simply open your favorite web browser and enter the IP address in the address bar and press enter. Please note: You do not need to enter the leading zero’s ( 0 ‘s ) in the IP address. For example, if you heard “192.168.001.010” you should change this to “192.168.1.10” By default, the Linksys SPA3102 does not have a username/password associated with it. If you are prompted for a username and password please enter the one you configured. Once logged in you should see a page such as the following: Linksys spa3102 configuration   STEP 3 We now want advanced access to this device so that we may make the proper configuration changes. First click on Admin login from the right side of the page, then click on Advanced: Linksys spa3102 sip configuration We are now ready to enter your Switch2Voip account information as well as properly configure your time and DNS servers. Continue to Step 4.   STEP 4 Click on WAN Setup and then make the following changes:  
  1. Set your Primary DNS server to a public DNS server such as 208.67.222.222. You can also set your Secondary DNS server to a public DNS server such as 208.67.222.220, 4.2.2.1… etc 
  2. Make sure your DNS Server Order is set to Manual, DHCP 
  3. Set your Primary NTP Server to 0.pool.ntp.org, or your preferred working NTP server. You can also add a Secondary NTP Server if you wish 
The time servers are indicated in the picture below: “time.nist.gov” and “time-a.nist.gov” are two primary time servers provided by the US Government for public use. The time server primarily will be used to show the correct time on your phone’s caller-id display when you receive a call. Linksys spa3102 sip configuration Once done scroll to the bottom of the page and click on Submit All Changes to save your changes. Once the page reloads click on the Voice tab at the top of the page and go to Step 5.   STEP 5 Click on the tab labeled SIP from the menu at the top. You will be provided with the various low level SIP protocol and codec-related options we will need to change in order to make sure your device is configured properly. You will want to set the following options: RTP Packet Size 0.020 G729b Codec Name G729 G729a Codec Name G729 Linksys spa3102 sip configuration Click the Submit all changes button after you have finished entering all information on the SIP page.   STEP 6 This is the last configuration step of this guide. Here you will configure additional settings specific to your Switch2Voip account which will enable you to register your Linksys SPA3102 to Switch2VoIP. To being click on the Line 1 option:

Linksys SPA3102 SIP SETTINGS


Setting Value
SIP Remote Party ID: No

Linksys SPA3102 PROXY AND REGISTRATION


Setting Value
Proxy: sip.switch2voip.us
Outbound Proxy: sip.switch2voip.us
Use Outbound Proxy: yes
Use DNS SRV: yes
DNS SRV Auto Prefix: yes
Proxy Redundancy Method:
 

Linksys SPA3102 SUBSCRIBER INFORMATION


Setting Value
Display Name: Enter your name in this field
User ID: Enter your Switch2VoIP account number here
Password: Enter your SIP Password here.
Use Auth ID: no
Auth ID: Enter your Switch2VoIP phone number here
 

Linksys SPA3102 AUDIO CONFIGURATION


Setting Value
Preferred Codec: G729a
DTMF Tx Method Auto
Use Preferred Codec Only: No
 

Linksys SPA3102 DIAL PLAN


Within the Dial Plan delete ALL of the current settings and replace them with the following by copying the text below and pasting it into the Dial Plan field: (*xx.|*xxx|*75xx|[3469]11|0|00|1xxx[2-9]xxxxxxS0|xxxxxxxxxxxx.|**275*x.)
Click the Save Settings button after you have finished entering all information on the Line 1 page. You should now be registered to Switch2Voip and your Voice Info page should now say Registered: Linksys spa3102 sip configuration  

STEP 7 That’s it! You can now make a phone call from your Linksys SPA3102.

You can place a call to a traditional landline or mobile phone by dialing either: 1 + the area code and number for calls to the US Or 011 + the country code, area code, and number for calls worldwide (you may also use 00 instead of 011).

External resources for Linksys SPA3102 settings

  1. Cisco SPA3102 Voice Gateway with Router
  2. Cisco SPA3102 Voice Gateway with Router Quick Start Guide 
  3. SIP Trunk settings