asterisk users - Sep 2004 - T100P calls with playback starts speaking before pickup

Hi

I am using a T100P connected to a panasonic phone switch usingT1 and the 
switch
has 4 analog lines connected to the CO or real world. When I call 
internal extensions
my playback message does not start speaking until I pick up. When I call 
9 and the number
to call my cell phone and playback a message it starts speaking right 
after dialing.
I does this behavior with or without callprogress enabled.

In summary:

BOX A (T100P) --------> Phoneswitch (T1 and 4 analog lines to CO)  
-------------> 4 analog lines to the world

I have extensions off the Phoneswitch like 216 (me).

I can place a call in the outgoing spool directory on BOX A to call me 
at 216.
This works fine - my playback message does not start until I pick up the 
phone.

I can place a call in the outgoing spool directory on BOX A to call my at my
cell phone. This works but my playback message starts speaking right away
after the dial. So I miss part of the message that is speaking as I have 
not
answered my phone yet and it is already speaking.

To start my calls I use:
echo > /tmp/call
echo "Channel: Zap/g1/95551212" >>  /tmp/call
echo "Context: smvoice-dialout" >> /tmp/call
echo "Extension: 500" >> /tmp/call
echo "Priority: 1" >> /tmp/call
mv /tmp/call /var/spool/asterisk/outgoing

extensions.conf is:
[smvoice-dialout]
exten => 500,1,Playback(demo-congrats)
exten => 500,2,Hangup

Is there something I am missing here?
Why is the call to my cell phone speaking the playback before I answer?
What can I do about it?

THanks,

Jerry