Specifications

Chapter 2 Maintenance
2-2
REPLACING THE LIU CARD
1. Turn off the power and remove the power connector, the T1 network cable and the 25 pair
standard telephone cable (and Bantam jacks if plugged in).
2. Unscrew the thumb screws at the back of the Access Bank and
remove the back cover.
3. Unscrew the thumb screw at the front of the Access Bank. This
holds the "cookie tray" in the chassis that contains the LIU card.
4. Slide the cookie tray out of the chassis. The LIU is the card that
lays across the tray toward the front. It has the 25 pair cable
connector on it. Remove the FXS card(s).
5. Unscrew the 5 hold-down screws on the LIU. Remove the LIU
card and replace. Screw down new card and slide FXS cards to
their slots.
6. Slide cookie tray back in and tighten the thumbscrew on the
front. Replace back panel and tighten thumb screws.
7. Re-attach T1 and 25 pair cables. Add power connector and turn
on power.
Self
Test
Normal
Normal
Normal
Normal
Network
Loopback
Alarm
Cutoff
Test
Status
T1
Framing
Input
Monitor
Output
Monitor
T1
-48Vdc
Return
Ground
Tip & Ring