[Asterisk-Users] sometimes CIDNUM shows, sometimes CIDNAME??? Why, why, why, why?

[Goran Dj.]

Why Asterisk showing (on SCCP and H323 phones) different CID related to
type of Incoming channel:
If incoming channel is SIP, on phone is displayed CALLERIDNUM
If incoming channel is ZAP, on phone is displayes CALLERIDNAME

It vas very frustrating! I lost couple hours of my time to find that my
dialplan is not faulty, but asterisk is!