12
Installation Guide
Factory Settings
Default Hardware Settings
Copper Loopback .................................................................................... Disabled
Fiber Loopback ........................................................................................ Disabled
Line Build Out (T3 models only) ......................................... Short Line (0-255 ft)
The hardware DIP switches can be overridden through software. Resetting the
line card via software will force the settings back to their default states and
return control to the hardware.
Default Software Setting
Port Enable/Disable ................................................................................... Enabled
Port Enable/Disable
Through software, either port on the T3/E3 line card can be enabled or disabled
independently. Disabling a port stops the flow of data to and from that port. If
the copper port is disabled, no signals will be sent from the coaxial transmitter
and an unframed all-ones pattern will be transmitted over the fiber line to the
remote line card.
Note: An all-ones pattern indicates an alarm indication signal (AIS) for the E3
line cards only. For T3 cards, the all-ones pattern is simply transmitted to the
remote device; it does NOT indicate AIS.
Remote
Device
Receives All 1s
Local Device
Detects
No Link
Local T3/E3
Card with Copper
Port Disabled
Remote T3/E3
Fiber Port
Receives All 1s
unlit LED
Coax
Coax
Fiber
green LED
LK
LK
LK
LK
All Ones
All Ones
If the fiber port is disabled, no signals will be sent from the fiber transmitter, and
an unframed all-ones pattern will be passed from the copper port.
