Cisco SPA

The Cisco SPA is a series of IP phones that you can use with your Telzio phone system.

In this article, you’ll learn how to configure a Cisco SPA phone to use with your Telzio service.

Before you get started, here are a few important notes:

  • You’ll need to create a User on your Telzio account to configure with your phone.
    Learn about creating Users.
  • If you have previously used the phone with a different carrier, you should do a factory reset on the phone first.
  • You can order preconfigured phones from our shop that arrive ready for calling.
  • Telzio can only provide limited support on phones that are not purchased directly from our shop.

Follow these steps to configure your phone with Telzio:

Log into the phone’s web interface

  1. On the phone, press Settings, then 9 to find the phone’s IP address.
  2. Type the IP address into your web browser to get to the phone’s configuration page.

Update the phone settings

  1. Click on the Admin LoginĀ link in the upper right corner of the page.
  2. Click on Phone.
  3. Under Line Key 1, Line Key 2, and Line Key 3, change the Extension value to 1.

Configure your User with the phone

Click on Ext 1 and enter the following settings:

  • NAT Mapping Enable: Yes
  • NAT Keep Alive Enable: Yes
  • SIP Port: 5060
  • Proxy:
  • Register: Yes
  • Register Expires: 3600
  • Make call without reg.: No
  • Ans call without reg.: No
  • Display Name: Your Name
  • User ID: TheĀ username for the User
  • Password: The password for the User
  • Use auth ID: No
  • Preferred Codec: G711u
  • Use preferred codec only: Yes

Set the SIP settings

  1. Click on the Advanced link in the upper right corner of the page
  2. Click on SIP
  3. Under RTP Parameters, set RTP Packet Size to 0.020


Click on Submit all changes.
Your phone will restart, and then you’re ready for calling.