VoIP Phones - Cisco SPA

From AAISP Support Site

Cisco SPA120 & SPA122

 
  • This is similar to the older Linksys PAP2T ATA
  • Ensure software is updated, as this does help with the quality of the audio, we upgraded to 1.3.2-XU (014) Jul 2 2013
  • Blog post regarding this
  • Does seem to work will with the modems on Sky boxes to talk home on.

The screenshots here were taken from a SPA112 which was actually set up to give a Sky box a phone line to call home on.

In short, set it up without echo cancellation, a-law only, no fax detect, no jitter adjust (set to high), UK line impedance, zero gain, etc.

 

View of the 'quick settings'

 

Line Settings

 

 

 

 

SIP Settings

Change RTP Packet Size: to 0.020 (which is 20ms)

 

 

Regional Settings

  • Change FXS Output gain to -3 if modems have problems
  • Change the impedance setting to 370_630|310nF

 

Retrieved from ‘http://support.aa.net.uk/index.php?title=VoIP_Phones_-_Cisco_SPA&oldid=4100’