0x0000 Link Blocked Request Forced
0x0001 Link Deferred Block Request (AN Only)
0x0002 Link Unblock Request
0x0003 User Port Block Request Forced
0x0004 User Port Unblock Request
0x0005 C Channel Switchover Request
0x0006 V5 Statistics Query
0x0007 Link Status Request
0x0008 C Channel Status Request
0x0009 Interface Status Request
0x000A User Port Status Request
0x000B Start Restart Procedure
0x000C Reserved (Diagnostics: Disables LAPV for Link)
0x000D Reserved (Diagnostics: Enables LAPV for Link)
0x000E Link Non-Deferred Blocking Request (AN only)
0x000F User Port Deferred Block Request (AN only)
0x0010 Startup Request
(Use this Event only when PPL Config. Byte #3 is set 0x0011 V5 Subscriber Query (Span/Channel and V5 ID/User Port AIBs)

0x0001 Configuration OK
0x0002 Configuration Error
0x0003 Control Request OK
0x0004 Link MDU Event
0x0005 Control Error
0x0006 Status Error
0x0007 Statistics Error
0x0008 Management Port
0x0009 Management COM
0x000A Common Error
0x000B Bind Error
0x000C Event Message DEC
0x000D Event Port Error Message
0x000E Event L4 Request
0x000F Event Invalid State
0x0010 UI Event
0x0011 Interface Down
0x0012 Startup Event
0x0013 Restart Event
0x0014 Data Link Release Event
0x0015 Common
0x0016 Switchover Event
0x0017 Event Message Send
0x0018 Event Message Received
0x0019 L1 FSM Event
0x001A Port Error
0x001B DSFE
0x001C MPH
0x001D Timer Event
0x001E PV Layer Event
0x001F Event Timer Expire
0x0020 Waiting for L3P BCC Link Blocked Acknowledgment
0x0021 V5 Statistics
0x0022 Link Status
0x0023 C Channel Status
0x0024 Interface Status
0x0025 User Port Status
0x0026 No call active for timeslot
0x0027 Call is up for the timeslot
(Contains appended V5 Subscriber ICB for the timeslot)