How to Set Up a Cisco IP Phone (SPA303)

How to set up a Cisco IP phone (SPA303) in 6 easy steps:

Step 1

Log on to your phone’s web interface by typing the phone’s IP address in your browser.

You can find the IP address by pressing the “settings” button (the one looking like a sheet of paper right under the voicemail/letter button), and pressing 9. 

Step 2

Click on the “Admin Login” link in the upper right corner of the page, followed by a click on the “Phone” tab.

Under “Line Key 1”, “Line Key 2” and “Line Key 3”, change the “Extension” value to “1”.

Step 3

Click on the “Ext 1” tab and enter following settings:

– Line Enable: Yes
– SIP Port: 5060
– Proxy: sip.telzio.com
– Register: Yes
– Register Expires: 3600
– Make call without reg.: No
– Ans call without reg.: No
– Display Name: Your Name
– User ID: The username you created on Telzio
– Password: The password for the user.
– Use auth ID: No
– Preferred Codec: G711u
– Use preferred codec only: Yes

Step 4

Click on the “Advanced” link in the upper right corner of the page, followed by a click on the “EXT1” tab.
Set “SIP Transport” to “UDP”.

Step 5

Click on SIP in the menu, and under “RTP Parameters”, set RTP Packet Size to 0.020

Step 6

Click on “Submit all changes”. Your phone will now restart, and you are ready to call.

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Peter leads innovation at Telzio. Born and raised in Denmark and coding since the age of six, Peter thrives on creating new efficient solutions and minimalistic, modern designs. He now lives in Los Angeles where he enjoys hiking with other thought leaders and his Siberian husky.