VoIP with Linksys/Sipura SPA3000 on iiNet

Well I just jumped on the VoIP bandwagon and after some teething and configuration issues, I think I have a stable setup. Some of you will be aware of the echo issues with the SPA3000 on incoming PSTN calls; following various bits of advice from the Whirlpool VoIP forums it looks like the echo has been eliminated whilst still maintaining call quality on both VoIP/PSTN incoming and outgoing calls. I’ll try to list what I did:

1. Plugged in the device without PSTN cable, dialed ***** to get to the voice menu and noted my IP address.
2. Downloaded the latest firmware (I am using the 3.1.10(GWd) firmware downloaded from this page). Installed on the SPA.
3. Reset to factory defaults by dialing ***** then 73738#. Now connected up the PSTN.
4. Downloaded the iiNet NewSipuraUtil config file from Whirlpool Wiki. Uploaded to SPA using this configuration tool
5. Obviously changed my username and password to what iiNet had provided me. Removed Gateways 2 and 3 as I will not use them.
6. In the web admin, changed the following settings:

   PSTN Line > International Control
   - FXO Port Impedance: 275+780||115nF
   - SPA to PSTN Gain: 3
   - PSTN to SPA Gain: 3
   Regional > Miscellaneous
   - FXS Port Input Gain: -3
   - FXS Port Output Gain: -3
   

7. Tested calls in all 4 directions and types, seems to work well.

I saved my config to a similar NewSipuraUtil file so please download my custom configuration file and let me know if it works for you. The default IP will be 192.168.1.3 on a 192.168.1.1 gateway so you may need to change that, and I blotted out my username/password.