VoIP Phones - Cisco SPA
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
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.
View of the 'quick settings'
Line Settings
SIP Settings
Change RTP Packet Size: to 0.020 (which is 20ms)
Regional Settings
Change the impedance settings:
Notes
- Has been known to work with SKy boxes to phone home using their modems.