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Overview
Figure 4
shows the line unit slot pinouts on the HMS backplane.
DS1/G.703TX-T
DS1/G.703RCV-T
ERR ALM BUS
HDSL1-T
MNRALM (LOS ALM)**
FRAMEGND
HDSL2-T
FL (NOT USED)
* FUSE ALARM IS NORMALLY FLOATING (0 TO-80V MAX)
AND AT-48V (10 MA MAX) WHEN ACTIVATED
** MINOR ALARM OUTPUT IS NORMALLY FLOATING (0 TO -60V MAX)
AND AT GND (10 MA MAX, +5 VDC for HLU-319 List 2D) WHEN ACTIVATED
Figure 4. HLU Slot Pinouts on the HMS Backplane
P
D
OWER
ISSIPATION
GR-63-CORE limits the maximum dissipation of the HMS shelf, which is a
12-inch (30.48 cm) deep individual CO equipment frame with open-faced
mountings and natural convection cooling, to 134.7 Watts per square foot.
This equates to 800 watts per bay for a 19" wide rank and 946 watts per bay
for a 23" wide rack.
Consult the HLU-319 technical practice to determine the
maximum number of slots that can be deployed without affecting
this maximum power dissipation density.
6
A
1
2
B
C
3
4
D
5
E
F
6
H
7
J
8
K
9
L
10
F
ACTORS
July 26, 1999
HMS-317 List 2 and HMS-318 List 2
100-317-102-04, Issue 4
DS1/G.703TX-R
DS1/G.703RCV-R
GND
HDSL1-R
NMABUS
-48VBAT
HDSL2-R
FUSE ALARM*
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