asterisk users - Aug 2006 - how to add prefix 0 (zero) when coming from ISDN trunk

Dear all
    operator network send caller id to asterisk.it doesn't have prefix 
(0) how can add prefix to caller id

ti

For an incoming call ?
exten => s,1,SetCallerID("${CALLERIDNAME}" <0${CALLERIDNUM}>

----- Original Message ----- 
From: "kitti jaisong" <kittij@ttt.co.th>
To: <asterisk-users@lists.digium.com>
Sent: Thursday, August 17, 2006 12:46 AM
Subject: [asterisk-users] how to add prefix 0 (zero) when coming from 
ISDNtrunk

> Dear all
>    operator network send caller id to asterisk.it doesn't have prefix
(0)
> how can add prefix to caller id
>
> ti
>
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