NEC ELECTRA ELITE IPK II, System Hardware Manual, Page: 196 / 642

___________________________________________________________________________________
6 - 54 Installing ETUs (Circuit Cards)
___________________________________________________________________________________
Document Revision 3 Electra Elite IPK II
5.9.4 LED Indications
Refer to Table 6-20 DTI-U40 ETU LED Indications .
5.9.5 Alarm Conditions
A brief description of each alarm condition is given below.
J
Alarm Indication Signal (AIS) Detection
On red when the system is receiving an Alarm Indication Signal
from an FT1 trunk.
J
Controlled Slip Event Detection (SLIP)
On red when the timing difference between a synchronous
receiving terminal and the received signal exceeds the
buffering ability of the terminal.
J
Cyclic Redundancy Check (CRC) Error Event Detection
On red when a CRC Error occurs.
Table 6-20 DTI-U40 ETU LED Indications
LED SW1-1 OFF With SW1-1 ON
LED 1
Link Indication
ON (Activated)
CH1 or CH9 or CH17 Indication
ON (Used)
LED 2
LSA Error Indication
ON (Error)
CH2 or CH10 or CH18 Indication
ON (Used)
LED 3
AIS Error Indication
ON (Error)
CH3 or CH11 or CH19 Indication
ON (Used)
LED 4
OOF Error Indication
ON (Error)
CH4 or CH12 or CH20 Indication
ON (Used)
LED 5
RAI Error Indication
ON (Error)
CH5 or CH13 or CH21 Indication
ON (Used)
LED 6
Loop Back Indication
ON (Loop Back
mode)
CH6 or CH14 or CH22 Indication
ON (Used)
LED 7
Self-Test Indication
ON (Testing)
CH7 or CH15 or CH23 Indication
ON (Used)
LED 8
Used CH Indication
ON (Using channel)
CH8 or CH16 or CH24 Indication
ON (Used)
LED 9
LIVE Indication
ON (Activated)