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S5700 Series Switches Hardware Description

This document provides an overall description of the S5700 hardware, helping you obtain detailed information about each chassis, card, power module, fan module, cable, and optical module.
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Version Mapping

Table 4-916 lists the mapping between the S5720-50X-EI-DC chassis and software versions.

Table 4-916 Version mapping



Software Version
S5720-EI S5720-X-EI S5720-50X-EI-DC

V200R009C00 and later versions

Appearance and Structure

Figure 4-366 S5720-50X-EI-DC appearance
1 One console port
It is used with a console cable. The console cable is not delivered with the switch and needs to be separately purchased if needed.
2 One USB port
3 Forty-six 10/100/1000BASE-T ports 4 Four 10GE SFP+ ports
5 DC power terminal

It is used together with a DC Power Cable.

6 Ground screw
It is used with a ground cable.
7 Two QSFP+ stack optical ports
Applicable modules and cables:
8 RPS socket

It is used with an RPS cable, which is not hot swappable.

Port Description

10/100/1000BASE-T port
A 10/100/1000BASE-T Ethernet electrical port sends and receives service data at 10/100/1000 Mbit/s, and must use an Ethernet cable. Table 4-917 describes the attributes of a 10/100/1000BASE-T Ethernet electrical port.
Table 4-917 Attributes of a 10/100/1000BASE-T Ethernet electrical port



Connector type


Standards compliance

IEEE802.3, IEEE802.3u, IEEE802.3ab

Working mode

10/100/1000 Mbit/s auto-sensing

Maximum transmission distance

100 m

10GE SFP+ port
A 10GE SFP+ Ethernet optical port supports auto-sensing to 1000 Mbit/s. It sends and receives service data at 1000 Mbit/s or 10 Gbit/s. Table 4-918 describes the attributes of a 10GE SFP+ Ethernet optical port.
Table 4-918 Attributes of a 10GE SFP+ port



Connector type


Optical port attributes

Depend on the optical module used

Standards compliance


Working mode

GE/10GE auto-sensing

QSFP+ stack optical port
QSFP+ stack optical ports can only be used for stack connection. Table 4-919 describes the attributes of a QSFP+ stack optical port.
Table 4-919 Attributes of a QSFP+ stack optical port



Connector type


Optical port attributes

Depend on the optical module used

Standards compliance


Console port
The console port is connected to a console for on-site configuration. The port must use a console cable. The console port is used when a switch is powered on for the first time. For details about the attributes of a console port, see Table 4-920.
Table 4-920 Attributes of a console port



Connector type


Standards compliance


Working mode

Duplex Universal Asynchronous Receiver/Transmitter (UART)

Baud rate

9600 bit/s, 19200 bit/s, 38400 bit/s, 57600 bit/s, or 115200 bit/s

Default value: 9600 bit/s

USB port
The USB port can have a USB flash drive connected to upgrade the switch, or transfer configuration files or other files. The USB port of the S5720-EI does not support USB 1.1 and can only connect to a USB flash drive that complies with USB 2.0.
USB flash drives from different vendors differ in model compatibility and drivers. If a USB flash drive cannot be used, try to replace it with another one from a mainstream vendor. Switches support a maximum of 128 GB USB flash drives.

Indicator Description

The S5720-50X-EI-DC has the same types of indicators as the S5720-50X-EI-AC. For details, see Indicator Description.

Power Supply Configuration

The S5720-50X-EI-DC has a built-in power module and does not support pluggable power modules. It can connect to an RPS1800 power supply for power redundancy.

Figure 4-367 shows the power supply mode of a single DC power module. The built-in DC power module (PWR) receives DC power from an external power source and provides a 12 V output to the chassis.
Figure 4-367 Power supply by a single DC power module

NEG: negative cable

RTN: positive cable

GND: 12 V reference ground

Heat Dissipation

The S5720-50X-EI-DC has a built-in fan for forced air cooling. Air flows in from the left side and front panel, and exhausts from the right side.

This figure only shows the airflow direction and does not depict the actual device.

Technical Specifications

Table 4-921 lists technical specifications of the S5720-50X-EI-DC.

Table 4-921 Technical specifications



Memory (RAM)

2 GB


512 MB in total. To view the available flash memory size, run the display version command.

Mean time between failures (MTBF)

74.31 years

Mean time to repair (MTTR)



> 0.99999

Service port surge protection

Common mode: ±6 kV

Power supply surge protection

±1 kV in differential mode, ±2 kV in common mode

Dimensions (H x W x D)

43.6 mm x 442.0 mm x 220.0 mm (1.72 in. x 17.4 in. x 8.7 in.)

Weight (with packaging)

4.7 kg (10.36 lb)

Stack ports

  • Two fixed QSFP+ stack ports on the rear card






Not supported

Rated voltage range

-48 V DC to -60 V DC

Maximum voltage range

-36 V DC to -72 V DC

Maximum power consumption (100% throughput, full speed of fans)

55.3 W

Typical power consumption (30% of traffic load)
  • Tested according to ATIS standard
  • EEE enabled
  • No PoE power consumption

47.45 W

Operating temperature

0°C to 45°C (32°F to 113°F) at an altitude of 0-1800 m (0-5906 ft.)

When the altitude is 1800-5000 m (5906-16404 ft.), the highest operating temperature reduces by 1°C (1.8°F) every time the altitude increases by 220 m (722 ft.).

Storage temperature

-40°C to +70°C (-40°F to +158°F)

Noise under normal temperature (27°C, sound power)

< 49.3 dB(A)

Relative humidity

5% to 95%, noncondensing

Operating altitude

0-2000 m (0-6562 ft.)


  • EMC certification
  • Safety certification
  • Manufacturing certification

Part number

Updated: 2019-08-19

Document ID: EDOC1000013597

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