I'm using i4b on a FreeBSD 4.1-STABLE box. Everytime I call out with one
of my ISDN-Phones, I have the following message in my syslog:
/kernel: i4b-L2-i4b_tei_rx_frame: UNKNOWN TEI MGMT Frame, type = 0x1
I'm also using isdntrace as protocol analyzer with two passive ISDN cards.
This feature works fine, I can see the phone numbers assigned to my TEIs
and so on.