Juniper ERX - RELEASE 11.1.X HARDWARE GUIDE 03-23-2010 Hardware Manual page 114

ERX 11.1.x Hardware Guide
Table 10: LED Identification and Activity Descriptions (continued)
LED
Location LED Label
HSSI line SYNC
module
YEL ALM
RED ALM
X.21/V.35 ACTIVE
line
module
LOOPBK
ERROR
V.35
X.21
DCE
DTE
Other line SYNC
modules
YEL ALM
RED ALM
The following figures show a representative module for each of the three variations:
98
Understanding Status LEDs to Troubleshoot
LED Indicator LED Color
Port status Green
NOTE: This LED is not functional on the HSSI line module.
Port status Red
Port status Green
Port status Yellow
Port status Red
Port status Green
Port status Green
Port status Green
Port status Green
Port status Green
Port status Yellow
Port status Red
SRP module (Figure 49 on page 99)
Ethernet line module (Figure 50 on page 100)
Other line modules (Figure 51 on page 100)
OFF to ON
If the port is configured as
DTE, the LED lights when both
the DCE and the clock source
are available.
If the port is configured as
DCE, the LED lights when the
DTE is available.
If the port is configured as
DTE, the LED lights when
either the DCE or the clock
source becomes unavailable.
If the port is configured as
DCE, the LED lights when the
DTE becomes unavailable.
Port configured
Port in local loopback or
remote loopback, depending
on the type of connection.
Port is enabled or comes
online
V.35 cable connected
X.21 cable connected
DCE cable connected
DTE cable connected
In frame
Far-end receive failure (FERF)
exists
Loss of sync/frame
ON to OFF
If the port is configured as
DTE, the LED goes out when
either the DCE or the clock
source becomes unavailable.
If the port is configured as
DCE, the LED goes out when
the DTE becomes
unavailable.
If the port is configured as
DTE, the LED goes out when
both the DCE and the clock
source are available.
If the port is configured as
DCE, the LED goes out when
the DTE is available.
Port not configured
Port not in loopback
Port is disabled or goes
offline
V.35 cable disconnected
X.21 cable disconnected
DCE cable disconnected
DTE cable disconnected
Not in frame
No FERF present
In frame