Network Card User Manual

Dial Shelf Field-Replaceable Units
Cisco AS5800 Universal Access Server Hardware Installation Guide1-26
• Bell alarm signaling
The PEMs provide relay outputs for standard central office bell alarms. These bell alarm contacts
are available on a terminal plug mounted on the PEM front panel.
• Online insertion and removal (OIR)
The PEMs support OIR, which means that you can remove or replace a PEM while the system is
operating; system operation is not affected.
The PEMs are located on either side of the filter module below a removable rear cover. Figure 1-14
shows the location of the PEMs as viewed from the dial shelf rear.
Figure 1-14 Power-Entry Modules—Dial Shelf Rear View
The PEMs contain two LEDs on the front panel—POWER and MISWIRE. The POWER LED
indicates that input voltage is present and the PEM circuit breaker is on; the MISWIRE LED should
remain off, but lights if the two DC conductors entering the PEM DC-input power terminal block
(see Figure 1-14) are reversed.
For detailed specification tables, refer to Appendix A, “Cisco AS5800 Specifications.”
H11655
–
4
8
V
–
4
8
V
R
T
N
C
N
C
N
O
P
O
W
E
R
M
IS
W
IR
E
C
N
C
N
O
P
O
W
E
R
M
IS
W
IR
E
–
4
8
V
–
4
8
V
R
T
N
Power switches
LEDs
DC-input power
terminal block
Bell alarm
terminal block
Filter module
PEM front panel
PEM front panel