asterisk users - Dec 2004 - Unable to create channel of type 'Zap' (cause 0)

Hi,

I've created a test at "extensions.conf" like this with 3 steps:


; When dial 5555, get the first available channel and dial do 482343400
exten => 5555,1,Dial(Zap/g1/482343400,5,rt)

; When dial 5555, get the channel 20 and dial do 482343400
exten => 5555,2,Dial(Zap/20/482343400)

; Go to Voicemail 1234
exten => 5555,3,Voicemail(u1234)


I've tried using just the first or the second "exten", but I
always
get the following message: "Unable to create channel of type 'Zap'
(cause 0)"

Here is the log console:

-- Executing Dial("SIP/leonardo-8cc3",
"Zap/g1/482343400|5|rt") in new stack
Dec  3 17:29:25 NOTICE[4629]: app_dial.c:788 dial_exec: Unable to
create channel of type 'Zap' (cause 0)
== Everyone is busy/congested at this time
-- Executing Dial("SIP/leonardo-8cc3", "Zap/20/482343400")
in new stack
Dec  3 17:29:25 NOTICE[4629]: app_dial.c:788 dial_exec: Unable to
create channel of type 'Zap' (cause 0)
== Everyone is busy/congested at this time
    -- Executing VoiceMail("SIP/leonardo-8cc3", "u1234") in
new stack
    -- Playing 'voicemail/default/1234/unavail' (language 'en')

Does anyone have any idea?

Thanks
Leonardo

On Fri, 2004-12-03 at 16:39 -0300, Leonardo Tramontina
wrote:
> Hi,
> 
> I've created a test at "extensions.conf" like this with 3
steps:
> 
> 
> ; When dial 5555, get the first available channel and dial do 482343400
> exten => 5555,1,Dial(Zap/g1/482343400,5,rt)
482-343-400

Are you missing a number? Looks like it to me, well if you are in the
US.
-- 
Steven Critchfield <critch@basesys.com>

what is the meaning of (cause 0).
i know that in * code it indicates an undefined cause but that's not enough.
i have many of this message in my logs. 
what would be the posiible causes for this message?
i have also the same message with SIP channels...

thanks,
Paradise Dove