A-32
MAX TNT Hardware Installation Guide
Slot Card Specifications and Connection Information
T3 card
Status lights
All status lights except LA illuminate upon startup or restart and remain illuminated until the
card passes its POST. If no lights are illuminated, the T3 interface is either disabled or is
receiving an Alarm Indication Signal (AIS) or Idle Signal.
Table A-25 explains the T3 card status lights.
Connecting the T3 card to the WAN
Connect the T3 line to the T3 card with two 75-ohm coaxial cables (RG 59/U). To provide for
redundant operation, the T3 card has a second pair of BNC jacks that can be used to connect to
a second T3 card or other Data Terminal Equipment (DTE).
When the T3 card is not powered or is in the reset state, the Line Rx and Line Tx signals are
electrically connected to the Bypass Rx and Bypass Tx jacks, respectively. When the T3 card
passes its POST, a relay switch connects the line jacks to the card’s T3 transceiver.
Inform your service provider that the equipment is connected, so the provider can activate the
line.
Table A-25. T3 card status lights
Light
Color
Description
LA
Green
On indicates the T3 interface is enabled and has not detected any
error conditions.
RA
Red
On indicates the T3 interface is experiencing loss of receive signal.
LO
Red
On indicates the T3 interface is out of frame alignment.
YA
Yellow
On indicates the T3 interface has detected Far End Receive Failure
indication transmitted from the other side.
FAULT
Yellow
Behaves as follows:
•
Illuminates when the unit has been reset.
•
Goes out when the unit has passed its power-on self test
(POST) and is running.
•
Blinks when a fatal error has occurred.
