2 ; Linux Telephony Interface
8 ; Select a mode, either the phone jack provides dialtone, reads digits,
9 ; then starts PBX with the given extension (dialtone mode), or
10 ; immediately provides the PBX without reading any digits or providing
11 ; any dialtone (this is the immediate mode, the default). Also, you
12 ; can set the mode to "fxo" if you have a linejack to make it operate
13 ; properly. If you are using a Sigma Designs board you may set this to
21 ; You can decide which format to use by default, "g723.1" or "slinear".
22 ; XXX Be careful, sometimes the card causes kernel panics when running
23 ; in signed linear mode for some reason... XXX
28 ; And set the echo cancellation to "off", "low", "medium", and "high".
29 ; This is not supported on all phones.
33 ; You can optionally use VAD/CNG silence suppression
35 ;silencesupression=yes
37 ; List all devices we can use. Contexts may also be specified
41 ; You can set txgain and rxgain for each device in the same way as context.
42 ; If you want to change default gain value (1.0 =~ 100%) for device, simple
43 ; add txgain or rxgain line before device line. But remember, if you change
44 ; volume all cards listed below will be affected by these values. You can
45 ; use float values (1.0, 0.5, 2.0) or percentage values (100%, 150%, 50%).
49 ;device => /dev/phone0