= Checking that Microphone and Speaker are Functioning Properly =

The easiest way to check if both microphone and speaker are functioning properly is by using pjsua and looping the microphone to the speaker in the conference bridge:

 1. run pjsua:
{{{
 $ ./pjsua
}}}
 1. loopback microphone to the speaker:
{{{
>>> cc 0 0
}}}
 1. Done

Now whatever captured in your microphone will be played-back locally to your speaker. 

== Note ==
This step is not recommended for PDA application since on PDA, the echo suppressor will cut the microphone signal once it detects that something is playing in the speaker.