chan_dahdi.c dahdi_pri_error Missing handling for mandatory

[system]

I keep seeing this error come up in my log file:
ERROR[5741] chan_dahdi.c: XXX Missing handling for mandatory IE 12 (cs0, Connected Number) XXX

I searched Google like a madman and have found nothing relevant.

Does anyone have ANY idea why, what it could mean or how to fix it?

[david55]

http://lists.digium.com/pipermail/asterisk-dev/2005-July/013739.html

Incidentally, it seems to have gone from recent versions of the code.