Zte ZXR10 2920, Руководство пользователя

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ZXR10 2920/2928/2952
(V1.0)
Access Switch User Manual
（
Volume I
）
32 Confidential and Proprietary Information of ZTE CORPORATION
„
If the label is attached on the optical interface equipment of
the customer, contents filled on the label are just contrary
to those at the ZXR10 2920/2928/2952 side.
Cable Lightning Protection
Requirements
Lightning can be direct lightning strike and induction. Damage of
direct lightning strike is hard to avoid. Following lightning
protection requirements are proposed to reduce equipment
failure rate in the areas where lightning is frequent.
Place the ethernet switch in the corridor, preferably on the first
floor to avoid the direct sunshine, rains, and lightning. Ensure
that all subscriber lines are distributed inside building to avoid
lightning induction. Uplink, downlink, and cascading lines are
distributed outside.
Cabling of Ethernet switch in a four-floor building with three
units is shown in Figure 17.
F
I G U R E
1 7 C
A B L I N G
O
F
T
H E
E
T H E R N E T
S
W I T C H
I
N
A B
U I L D I N G
... ... ...
Sw
itc
h
Switc
h
Sw
itch
Switch placement in fourth floor is explained below.
„
Switch A is in Unit 1 and is convergence switch of the whole
building. Switches B and C are access switches.
„
Switches A, B, and C are cascaded. Cascading cables refers
to connecting two switches. Cascading cable of switch A is
the uplink cable of switch B, and cascading cable of switch B
is uplink cable of switch C. Rest of subscriber lines are
Lightning
Protection
Switch cabling
Explanation