This extension will give the user the ability to test there SIP
connection with Asterisk. Basically, when somebody dials 5000, they
will hear a message stating it is an echo test and allow the person to
talk into their phone. Asterisk will echo back when it hears.
Change-Id: I4b4002ce4ec0a3de3f434754aff9d17d6b82fcb8
Signed-off-by: Paul Belanger <pabelanger@redhat.com>