Relaying caller ID of incoming calls for tandem call

[phadobas]

I have this IMS that I'm connecting to a Cisco Call Manager via ISDN PRI.
I got as far as making station-station calls showing the extension of the caller both ways.
But! When there is an incoming DID call to the IMS, I use APHN to route the DID call to a virtual line in the IMS, which is then Call Forward All Calls programmed to send the call across the ISDN to an extension on the Cisco.
Well, Cisco won't show the caller ID of the incoming call. I'm an NEC guy, don't know about Cisco. The guy who works the Cisco can see the caller ID correctly in the logs, but sees a bit or something flagged to hide that caller ID. As a result, the Cisco phone receiving the call displays only 'external call', and no caller ID.
For the life of me, I can't figure it out (assuming that the problem is on the NEC side...).
I checked SFI94, 97, 98 and tried all combinations, although I actually don't think the problem is there. Then I also went through ARTD, and to my best knowledge, everything is set correctly. I tried different types of ISDN settings (AT&T #4&5, and National ISDN 2)...But I believe I'm missing something very simple here.
I had set up a similar thing on a 2400ICS. Connected it to an Asterisk via ISDN and got it all working with caller ID both ways on internal and external calls. So I know it's possible to do.
So, any ideas?

 

[belevedere]

Look at ARTD CDN 98, 112, ARTE CDN 29, this is to allow ANI digits to pass through to CCIS, and it also lists ARTD CDN 98 as well.

 

[phadobas]

Thanks for the advice. My ARTD ends at CDN69, so there is not 98 or 112. But I'll definitely check into ARTE 29 next time I get a chance to access the system. Will let you know.