[I]
[..]
INDICATION_STRINGS
INITIALIZED_MAGIC
ISDN_FUNC_TRACE_ENTER
ISDN_FUNC_TRACE_EXIT
ISDN_PCAP_INCOMING
ISDN_PCAP_INCOMING_BCAST
ISDN_PCAP_OUTGOING
IS_ACCEPTING_PENDING
I_FRAME
IsQ931Ext
[..]