SPA-3102 like an SPA-3000

To make it forget the router bit exists.

Same works for SPA-2102.

The box has 2 ethernet interfaces.  Confusingly they have different name
 on the box as they do in the web interface.

The 2 connections are

Ethernet  - called LAN in the web interface
Internet  - called WAN in the web interface


By default, LAN acts as a DHCP server.  WAN acts as DHCP client.

The web inferface is disabled on the WAN side.


Steps

1) Connect a PC with DHCP client to the Ethernet connection

The PC should automatically acquire an IP address, it might be necessary to restart networking or just the whole computer so it gets a new IP address

2)  web browse to  http://192.168.0.1/ or http://192.168.1.1/

3) click Admin, advanced, Wan Setup

4) Find the setting for `Enable WAN Web Server` and set to yes.  Submit
all changes.

5) Disconnect unit.  Put a sticky label/tape over the Ethernet(LAN)
interface.

You now have a unit that will behave just like an SPA-3000.   The only
difference is you have to click on `Voice` to see all the voice
settings.   Auto configuration scripts should work just the same.