CTC Union ETU-01A - Page 96

Chapter 5. Loop Back and BERT Testing
90
November 2001
Table 5-1 LED indicators
Indicator
Color
Function
Power Green
ON when power is on.
Sig Loss Red ON when received signal is lost.(E1 Line)
Sync Loss
Red ON when received frame sync is lost.(E1 Line)
Alarm Red
ON when E1 has an alarm. (Includes: BPV error / CRC4 error /
Frame slip / All one / Remote alarm)
RD
Yello
w
ON when SPACE is being received. Off when MARK is being
received.
Flashing when data is received.
TD
Yello
w
ON when SPACE is being transmitted, Flashing when data is
transmitted.
Error Red ON when BERT function is activated and detects bit errors.
Test Red
ON when the ETU-01A is in any loop back mode or BERT
function is on. Flashing when in loop back initiated by the
remote unit.
Display:
The ETU-01A maintains an alarm buffer. The buffer can
store an alarm event of each type along with the time of
occurrence. A maximum of 256 alarms may be stored and
displayed on the front panel LCD through the ALARM BUFFER
DISPLAY menu or the terminal connected to the Control Port.
Table 5-2, on the next page, presents the alarm messages
generated by the ETU-01A.