Music On Hold for Asterisk

1.
sip.conf ---------------------
2.

3.
[8888]
4.
type=friend
5.
context=outbound
6.
callerid="UnKnown" <8888>
7.
username=8888
8.
secret=mypassword
9.
host=dynamic
10.
nat=yes
11.
dtmfmode=rfc2833
12.

13.
extensions.conf ---------------------
14.

15.
[outbound]
16.
exten => 121,1,MusicOnHold(10)