Juniper E-Series Installation And User Manual page 126

10-4 CHAPTER 10
Troubleshooting
Table 10-2 LED identification and activity descriptions (continued)
LED Location LED Label
Ethernet line LINK
modules
ACTIVITY
HSSI line SYNC
module
YEL ALM
RED ALM
X.21/V.35 line ACTIVE
module
LOOPBK
ERROR
V.35
X.21
DCE
DTE
Other line SYNC
modules
YEL ALM
RED ALM
LED Indicator LED Color OFF to ON
Ethernet Green
Ethernet Green
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
The following figures show a representative module for each of the three
variations:
• SRP module (Figure
Ethernet link up
Blinks when Ethernet
traffic on link
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. (See)
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
10-1)
ON to OFF
Ethernet link down
No Ethernet traffic
on link
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 LE 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