asterisk users - Oct 2005 - Distinguishing National from International Calls on Zap Channel

Hi there,

can anybody tell me how can i distinguish an national from an 
international call. The CallerID on the channel doesn't have any leading 
'0' or '00' so that it is possible that i cannot be sure what
type of
call i have.

i have tried to include 'nationalprefix' and
'internationalprefix' to
zapata.conf, as proposed in

http://www.asteriskguru.com/tutorials/pri_zaptel.html

but while restarting * tells me that these options are unknown.

Is there any way to access NPI or TON information of an incoming call on 
Zap Channels?

Tobias Wolf