Table 3-4
Power supplies supported by the S1720
Series
Device Model
Power Supply
Configuration
PoE
Hot
Swappin
g
S1720
S1720-20GFR-4T
P
One built-in power supply
×
×
S1720-28GFR-4T
P
One built-in power supply
×
×
3.3.3 Heat Dissipation System
S1720-20GFR-4TP and S1720-28GFR-4TP adopt the fanless design and supports nature heat
dissipation.
3.3.4 Optical Module Attributes
Table 3-5
Attributes of FE optical modules
Model
Transmis
sion
Distance
(km)
Standar
d
Fiber Type
SFP-FE-SX-MM1310
(SFP optical module)
≤
2
100base-
FX
l
Fiber mode: multimode
l
Core diameter: 50 μm or 62.5
μm
l
Connector type: LC
eSFP-FE-LX-SM1310
≤
15
100base-
LX
l
Fiber mode: single-mode
l
Connector type: LC
S-SFP-FE-LH40-SM1310
≤
40
100base-
LX
S-SFP-FE-LH80-SM1550
≤
80
100base-
LX
SFP-FE-LX-SM1310-BIDI
(Bidirectional optical
module)
≤
15
100base-
BX
SFP-FE-LX-SM1550-BIDI
(Bidirectional optical
module)
≤
15
100base-
BX
S1720 Series Ethernet Switches
Product Description
3 Hardware Architecture
Issue 01 (2014-07-20)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
14