[asterisk-users] breaking into asterisk channel

[Chaya Zipora Rosenberg]

Hello,
>   I am setting-up a system to place outgoing calls for a certain 
> number of minutes (as allowed per the customer's account). I would 
> like to "break into" the long distance channel to announce "1 minute 
> left", etc.   What asterisk command can I use to do this?
>
> Thank you in advance for your help.
>
> Chaya Rosenberg
> Programmer,
> Olehphone VOIP services
>