asterisk users - May 2005 - ZapBarge a PRI DDI

I'm using a TE405p with all four spans enabled, two configured as pri_cpe
and two as pri_net, the asterisk is sitting between our ISDN (UK BT
EuroISDN30) and our phone system.  We have 200 DDI numbers on the ISDN's and
I need to give one of our clients dial-in access to be able to monitor calls
we handle on their behalf.  I've got ZapBarge working but I need to restrict
the client access to calls on their unique DDI only.  Unfortunately, of
course at any moment in time a call on their DDI could be on any channel so
I can't restrict it by channel and our agents are multi-skilled so can't
restrict by agent.  I need to be able to allow by DDI only.  Can anyone
suggest how I  might be able to achieve this?

Thanks,

Steve

On 5/6/05, Steve Rawlings <steve@rawlings.demon.co.uk>
wrote:
> I'm using a TE405p with all four spans enabled, two configured as
pri_cpe
> and two as pri_net, the asterisk is sitting between our ISDN (UK BT
> EuroISDN30) and our phone system.  We have 200 DDI numbers on the
ISDN's and
> I need to give one of our clients dial-in access to be able to monitor
calls
> we handle on their behalf.  I've got ZapBarge working but I need to
restrict
> the client access to calls on their unique DDI only.  Unfortunately, of
> course at any moment in time a call on their DDI could be on any channel so
> I can't restrict it by channel and our agents are multi-skilled so
can't
> restrict by agent.  I need to be able to allow by DDI only.  Can anyone
> suggest how I  might be able to achieve this?
SIMPLE 

exten => 12345/6789,1,ZapBarge()
exten => 12345/6789,2,Goto(BYEXTENSION,1)

where 12345 would be your DID
and 6789 would be callerid of your customer.

OTHER option is to use Disa application
with pin authorization and then redirect to specific extension with ZapBarge

rgrds
m.