ADTRAN ISU 512 - Manual (Page 90)

Appendix A. Status Buffer Messages
74 ISU 512 User Manual 61202.086L1-1
INCOMING_CALL_BA
Incoming call barred. The network will not allow an incoming call.
INCOMPATIBLE_DEST
The called number cannot accept the type of call that has been placed.
INTRWORKING _UNS
A message was sent by a far-end network that was not understood.
INVALID_CALL_REF
Call control error.
INVALID_ELEM_CON
Call control error.
INVALID_MSG_UNSP
Invalid message, protocol error.
INVALID_NUMBER_F
The dialed number has an invalid format.
L1 not up
The network interface is not active.
L2 not up
The data link layer interface is not active.
L3 not up
The call control interface is not active.
L2 #{1- 8} not up
The data link layer interface for the call number shown (BONDING) is not ac-
tive.
L3 #{1- 8} not up
The call control layer interface for the call number shown (BONDING) is not
active.
LDN TOO LONG
The entered Local Directory Number has too many digits.
MANDATORY_IE_LEN
Mandatory information element length error.