Have a look into some of these variables/options below, use google+wiki;

uuid_displace - allows you to inject audio into a channel
temp_hold_music - allows you specify music during transfer hold

campon - places call into parking when on hold (not 100% on this, needs clarification)

You could also modify the MOH file to play the message you require at the desired intervals. Realistically I think this would be the best way, as this will give you much more control over the quality delivered (fading, volume, etc).

Hope this helps

Cal

On Thu, Oct 10, 2013 at 2:18 AM, Nandy Dagondon <nandy1925@gmail.com> wrote:

Hello everyone,

I like to play an announcement file before playing music-on-hold. Is this possible? Any hint? 

Tks,

Nandy

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