As found on Voip-info.org, a list of bandwidth consumption per codec.
It's worth mentioning that the table also indicates the total consumption including IP overhead. When making assumptions about bandwidth requirements, it is useful to take this overhead into account.
|G.711||64 Kbps||87.2 Kbps|
|G.729||8 Kbps||31.2 Kbps|
|G.723.1||6.4 Kbps||21.9 Kbps|
|G.723.1||5.3 Kbps||20.8 Kbps|
|G.726||32 Kbps||55.2 Kbps|
|G.726||24 Kbps||47.2 Kbps|
|G.728||16 Kbps||31.5 Kbps|
|iLBC||15 Kbps||27.7 Kbps|
An excellent resources website on how to configure Cisco phones to work on Asterisk. This includes the provisioning of phones, configuring them in Asterisk and enabling advanced functionality for Cisco on Asterisk.
The specifications for the background on a Yealink T46(G) can be found in the Administrator Guide:
You can reset the SPA3102 to factory default using the Interactive Voice Response (IVR) and following these steps: