$ cat /etc/asterisk/musiconhold.conf
[general]
cachertclasses=yes

[default]
mode=files
directory=moh

############################

$ cat /etc/asterisk/extconfig.conf
[settings]
sipusers => mysql,asterisk,AST_sip_buddies
sippeers => mysql,asterisk,AST_sip_buddies
voicemail => mysql,asterisk,AST_voicemail
queues => mysql,asterisk,AST_queues
queue_members => mysql,asterisk,AST_queues_members
meetme => mysql,asterisk,AST_meetme
musiconhold => mysql,asterisk,AST_musiconhold




############






[root@SRV-IPOP1 oceanet]# mysql -u root -p asterisk
Enter password:
...

mysql> select * from AST_musiconhold;
+---------+------------------------------+-------------+-------+-------+--------+--------+
| name    | directory                    | application | mode  | digit | sort   | format |
+---------+------------------------------+-------------+-------+-------+--------+--------+
| default | /var/lib/asterisk/moh        |             | files |       | random |        |
| cmapub  | /var/lib/asterisk/moh/cmapub |             | files |       | random |        |
+---------+------------------------------+-------------+-------+-------+--------+--------+
2 rows in set (0.00 sec)