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6 Installation Guide
Link Loss Return Switches
The Radiance SONET single interface line card incorporates Link Loss
Return (LLR) functionality as an aid in troubleshooting remote
connections. LLR is enabled independently on each port. When LLR is
enabled on a port, loss of its receive (RX) link disables its own transmit
(TX) link.
LLR1 enables/disables Link Loss Return on Port 1, and LLR2 enables/
disables the function on Port 2. To enable Link Loss Return for a port,
set its LLR switch ON (up). Set the switch OFF (down) to disable the
function.
For more information, refer to Link Loss Return in the User Guide
section of this manual.
SX
LK
PWR
M
M
1000BASE
R
X
LX
LK
S
M
T
X
DIP switches
Power Connector
Port 1
Port 2
ON
OFF
LLCF
LLR1
LLR2
R
X
T
X