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S2700 Series Switches Hardware Description

This document provides an overall description of the S2700 hardware, helping you obtain detailed information about each chassis, cable, and optical module.
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S2720-12TP-EI

S2720-12TP-EI

Version Mapping

Table 4-74 lists the mapping between the S2720-12TP-EI chassis and software versions.

Table 4-74  Version mapping

Series

Model

Software Version
S2720-EI S2720-12TP-EI

V200R011C10 and later versions

Appearance and Structure

Figure 4-33  S2720-12TP-EI appearance
1 Four 10/100BASE-TX ports 2 Four 10/100/1000BASE-T ports
3 Two combo ports (10/100/1000BASE-T + 100/1000BASE-X)
Modules applicable to combo optical ports:
4 Two 1000BASE-X ports
5 One console port 6 PNP button
NOTICE:

Applicable in V200R012C00 and later versions:

To restore the factory settings and reset the switch, hold down the button for at least 6 seconds.

To reset the switch, press the button.

Resetting the switch will cause service interruption. Exercise caution when you press the PNP button.

7 AC socket
NOTE:

It is used with AC Power Cable.

8 Jack reserved for AC power cable locking strap
NOTE:
The AC power cable locking strap is not delivered with the switch.

Port Description

10/100BASE-TX port
A 10/100BASE-TX Ethernet electrical port sends and receives service data at 10/100 Mbit/s, and must use an Ethernet cable. Table 4-75 lists the attributes of a 10/100BASE-TX Ethernet electrical port.
Table 4-75  Attributes of a 10/100BASE-TX Ethernet electrical port

Attribute

Item

Connector type

RJ45

Standards compliance

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

Electrical port attributes

MDI/MDIX

NOTE:
  • A medium dependent interface (MDI) provides the physical and electrical connection to the cabling medium. Ethernet ports of most NICs are MDIs.
  • A medium dependent interface crossover (MDIX) enables connection between like devices. MDIX ports are usually used on hubs or LAN switches.

Working mode

10/100 Mbit/s auto-sensing

Maximum transmission distance

100 m

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 4-76 describes the attributes of a 10/100/1000BASE-T Ethernet electrical port.
Table 4-76  Attributes of a 10/100/1000BASE-T Ethernet electrical port

Attribute

Description

Connector type

RJ45

Standards compliance

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

Working mode

10/100/1000 Mbit/s auto-sensing

Maximum transmission distance

100 m

Combo port
A combo port refers to a pair of ports consisting of an optical Ethernet port and an electrical Ethernet port on the panel. Each combo port matches only one internal forwarding port. A combo port can be configured as an electrical port or an optical port, but only one port can be active at a time. When one port is active, the other port is shut down.
NOTE:

By default, a combo port works in auto mode, in which the port type is determined as follows:

  • If the optical port has no optical module installed and the electrical port has no Ethernet cable connected, the port type depends on which port is connected first. If the electrical port is connected by an Ethernet cable first, the electrical port is used for data switching. If the optical port has an optical module installed first, the optical port is used for data switching.
  • If the electrical port has an Ethernet cable connected and is in Up state, the electrical port is still used for data switching when the optical port has an optical module installed.
  • If the optical port, no matter in Up or Down state, has an optical module installed, the optical port is still used for data switching when the electrical port has an Ethernet cable connected.
  • If the optical port has an optical module installed and the electrical port has an Ethernet cable connected, the optical port is used for data switching after the switch restarts.
You can configure a combo port as an electrical or optical port using the combo-port command.
1000BASE-X port
When a 1000BASE-X port uses a GE optical module, it can only transmit and receive data at 1000 Mbit/s and does not support the 100 Mbit/s transmission speed. When a 1000BASE-X port uses a GE copper module, it can transmit and receive data at 10 Mbit/s, 100 Mbit/s, or 1000 Mbit/s. Table 4-77 describes the attributes of a 1000BASE-X Ethernet optical port.
Table 4-77  Attributes of a 1000BASE-X Ethernet optical port

Attribute

Description

Connector type

LC/PC

Optical port attributes

Depend on the module used

Standards compliance

IEEE802.3z

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 4-78.
Table 4-78  Attributes of a console port

Attribute

Description

Connector type

RJ45

Standards compliance

RS-232

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

Indicator Description

The S2720-12TP-EI has similar indicators to those on the S2720-28TP-PWR-EI, except that the S2720-12TP-EI does not have a PoE mode indicator. For details, see Indicator Description.

Power Supply Configuration

The S2720-12TP-EI has a built-in power module and does not support pluggable power modules.

Figure 4-34 shows the power supply mode of a built-in AC power module. The built-in AC power module (PWR) receives power from an external power source and provides a 12 V output to the chassis.
Figure 4-34  Power supply mode of a built-in AC power module

L: live wire

N: neutral wire

PGND: protection ground

GND: 12 V reference ground

Heat Dissipation

The S2720-12TP-EI has no fans and uses natural heat dissipation.

Technical Specifications

Table 4-79 lists technical specifications of the S2720-12TP-EI.

Table 4-79  Technical specifications

Item

Description

Memory (RAM)

512 MB

Flash

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

Mean time between failures (MTBF)

23.8 years

Mean time to repair (MTTR)

2 hours

Availability

> 0.99999

Service port surge protection

Common mode: ±7 kV

Power supply surge protection

±6 kV in differential mode, ± 6 kV in common mode

Dimensions (W x D x H)

250.0 mm x 180.0 mm x 43.6 mm (9.8 in. x 7.1 in. x 1.72 in.)

Weight (including package)

1.8 kg (3.97 lb)

Stack ports

Two 1000BASE-X ports

RTC

Not supported

RPS

Not supported

PoE

Not supported

Rated voltage range

100 V AC to 240 V AC, 50/60 Hz

Maximum voltage range

90 V AC to 264 V AC, 47 Hz to 63 Hz

Maximum power consumption (100% throughput)

12.85 W

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

10.39 W

Operating temperature

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

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.).

The operating temperature of the switch is 0°C to 40°C (32°F to 104°F) when it uses GE SFP optical modules with 40 km transmission distance.

Storage temperature

-40°C to +70°C (-40°F to +158°F)

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

Noise-free (no fans)

Relative humidity

5% to 95%, noncondensing

Operating altitude

0-5000 m (0-16404 ft.)

Certification

  • EMC certification
  • Safety certification
  • Manufacturing certification
Part number 98010731
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Updated: 2019-05-16

Document ID: EDOC1000027458

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