Allied Telesis AT-CM70S - Manual (Page 41)

Converteon Media Converter Line Cards Reference Guide
41
T1/E1 Port LEDs Table 9 lists the T1/E1 surface-mount diagnostic LED’s provisioned on the
Mezzanine Adapter and are viewable through the line card front panel.
Table 8. T1/E1 Port LEDs
LED State Description
RCL
[1 to 4] Amber Receive Carrier Loss occurred on the
T1/E1 port.
Green The T1/E1 port is operating normally
(NML) and has no Receive Carrier Loss.
LOTC
[1 to 4] Amber Loss of Transmit Clock occurred on the
T1/E1 port.
Green The T1/E1 port is operating normally
(NML) and has no Loss of Transmit
Clock.
AIS
[1 to 4] Amber The T1/E1 has received Unframed All
Ones.
OFF The T1/E1 port is operating normally
(NML) and no AIS received.
TEST
[1 to 4] Green T1/E1 port is synchronized to PRBS test
stream: 2
15 -1 (E1) or QRSS (T1).
OFF PRBS test stream not detected on the
T1/E1 port.