Chapter 4 - Hardware Structure
Confidential and Proprietary Information of ZTE CORPORATION 41
F
IGU R E
11
TS LC
P
AN EL
RST
TEST
RUN
ALM
TSLC
3. LED Indicators
The TSLC has three indicators on the panel: RUN, ALM and TEST.
When TSLC is running normally, the RUN indicator will be on while the
ALM indicator will be off.
4. Interfaces
A TSLC can be used to test subscriber lines at multiple layers of
subscriber units. The test buses of these subscriber units must be
interconnected through an interface on the backplane.
5. Technical Indices
Supported subscriber units: 20
Board power consumption: 5 W
POWER H
1. Functions
The POWER H is used to provide secondary power and ringing current
for all subscriber shelves. The POWER Hs at all layers can provide
power assistance for each other. POWER H board outputs four types of
voltages: +5 V, -5 V, -48 V and 75 V AC ringing. The primary power
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