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Appendix A - Specifications
H4TU-C-319 C
Figure 32
shows the card-edge connectors on the H4TU-C-319. Active pins are highlighted in black.
Network Management Control Bus
The H4TU-C provides a Network Management Control Bus on pin 7 of the card-edge connector. This allows the
various Management System protocols to manage the H4TU-C through the HMU-319. Whenever the H4TU-C is
under management, the MNGD message displays periodically on the front-panel display.
Some H4TU-C-319 features are affected when it is under management. Consult the management
unit practice for further information (see
Fuse Alarm
Pin 10 on the card-edge connector is a Fuse Alarm that is driven to -48 Vdc whenever its onboard fuse opens. It
emulates the function of the Fuse Alarm output from pin 10 on normal, high-density (HD) repeaters. Pin 10 is
connected to pin 5 of the 1184 Alarm Card (slot 1 in the HD shelf) and causes the 1184 Fuse ALM LED to light
when the pin 10 signal is activated. Its normally floating output must never be driven above ground or below
-80 V. It can sink a current of 10 mA. The H4TU-C does not support the BPV function (Pin E) of normal HD
repeaters.
62
-E
C
ARD
DGE
ONNECTOR
(IN) DSX-1Tip
(OUT) DSX-1Tip 1
HDSL4 - L1Tip
System Alarm**
Frame GND
HDSL4 - L2Tip
(Do not use)
*
Fuse Alarm
Normal = Floating (0 to -60 Vdc maximum)
Activated = -48 Vdc (10 mA maximum)
System Alarm and Management Bus (reserved)
**
Figure 32. H4TU-C-319 Card-Edge Connector
September 12, 2003
A
1
DSX-1 Ring (IN)
B
2
DSX-1 Ring 1 (OUT)
C
3
D
4
E
5
GND
F
6
HDSL4 - L1 Ring
H
7
Management Bus**
J
8
-48 Vdc
K
9
HDSL4 - L2 Ring
L
10
Fuse Alarm*
"Appendix D - Product Support" on page
LTPH-UM-1031-03, Issue 3
66).
H4TU-C-319 List 1
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