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S7700 Series Switches Hardware Description

This document describes hardware components of the S7700, including the cabinet, chassis, power supply facilities, fan modules, cards, cables, and pluggable modules for interfaces. You can find useful information about S7700 hardware components from this document.
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ES1D2G48TBC0-48-Port 10/100/1000BASE-T Interface Card (BC, RJ45)

ES1D2G48TBC0-48-Port 10/100/1000BASE-T Interface Card (BC, RJ45)

Version Mapping

Table 7-256 Switch chassis and software versions matching the card

Card Name

S7700 Chassis


S7703, S7706 and S7712 chassis: supported in V200R002C00 and later versions

S7703 PoE and S7706 PoE chassis: supported in V200R013C00 and later versions


The ES1D2G48TBC0 can be installed in:

  • Slots 01 to 03 in an S7703 or S7703 PoE chassis.
  • Slots 01 to 06 in an S7706 or S7706 PoE chassis.
  • Slots 01 to 12 in an S7712 chassis.
Figure 7-122 Appearance of the ES1D2G48TBC0


Table 7-257 Functions of the ES1D2G48TBC0
Function Description

Basic function

Provides forty-eight 10M/100M/1000M Ethernet electrical ports for data transmission and line-rate switching.

Capable of handling 50 Gbit/s traffic.

Distributed forwarding

Performs concurrent data forwarding using a distributed data plane.

Hot swapping

The ES1D2G48TBC0 is hot swappable.


The ES1D2G48TBC0 and ES1D2G48SBC0 of the S7700 have a large buffer capacity. The 1.25 GB buffer capacity on each port achieves 200 ms buffering, which prevents packet loss caused by traffic bursts on a network. When the network is congested and traffic bursts occur, the large-buffer cards can effectively buffer traffic on ports. The large buffer capacity, combined with QoS traffic shaping, ensures even, stable traffic transmission on a congested, unstable network. These cards prevent packet loss while reducing congestion and traffic bursts on upstream devices.

The large-buffer cards apply to data center networks and video networks:

  • When used on a data center network, these cards ensure fast, stable, and low-latency data forwarding.
  • When used on a video network, these cards can prevent voice/image distortion, delay, and asynchronous image and voice presence caused by packet loss and transmission latency, guaranteeing high-quality video conferences.

The following uses a collaborative computing scenario as an example to describe application of these cards in a data center.

Complicated computing tasks, such as search engine computing, oil exploration computing, and meteorological computing, must be carried out by multiple servers simultaneously. In this situation, the servers perform collaborative computing, which results in fast transmission of data flows on a network and traffic bursts when multiple servers send computing data to one server at the same time. Traffic bursts cause congestion on network nodes, as shown in Figure 7-123. Packets are dropped on congested network nodes.

Figure 7-123 Traffic bursts caused by collaborative computing in EoR deployment

As shown in Figure 7-124, all switches from the end of row (EoR) switches to core switches in a data center are equipped with large-buffer cards. These large-buffer cards prevent packet loss caused by traffic bursts in the data center.

Figure 7-124 Large-buffer cards deployed in a data center

Indicators and Ports

Figure 7-125 Indicators on the ES1D2G48TBC0 panel

Table 7-258 Indicators on the ES1D2G48TBC0 panel






LINK/ACT indicator of an upper electrical port


Steady on: A link has been established on the port.

Blinking: The port is transmitting and receiving data.


LINK/ACT indicator of a lower electrical port


RUN/ALM: running status indicator


Steady on: The card has been powered on, but the software is not running.

Slow blinking: The card software is running properly.

Fast blinking: The card software is starting.


Steady on: The card has failed and the fault requires manual intervention.


Steady on: The card is powered off. (For example, the card has been forcibly powered off using the power off command or is about to start.)

Figure 7-126 Ports on the ES1D2G48TBC0 panel

1 Forty-eight 10/100/1000BASE-T electrical ports
10/100/1000BASE-T electrical ports

Table 7-259 lists the attributes of a 10/100/1000BASE-T electrical port.

Table 7-259 10/100/1000BASE-T electrical port attributes
Attribute Description
Connector type RJ45
Standards compliance IEEE 802.3ab
Frame format Ethernet_II, Ethernet_SAP, Ethernet_SNAP
Network protocol IP


Table 7-260 Specifications of the ES1D2G48TBC0



Physical specifications

  • Dimensions (H x W x D): 35.1 mm x 394.7 mm x 426.8 mm (1.38 in. x 15.54 in. x 16.80 in.)
  • Weight: 2.90 kg (6.39 lb)
  • Maximum power consumption: 160 W

Environment specifications

  • Operating temperature: 0°C to 45°C (32°F to 113°F)
  • Operating relative humidity: 5% RH to 95% RH (noncondensing)
  • Storage temperature: -40°C to +70°C (-40°F to +158°F)
  • Storage relative humidity: 5% RH to 95% RH (noncondensing)

Ordering Information

Card ordering information is subject to updates with product version upgrades. The ordering information provided in this manual is for reference only. To obtain the latest ordering information, contact Huawei switch distributors or Huawei local office.

Table 7-261 Ordering information
Part Number Card Description Card Model
03030QJT 48-port 10/100/1000BASE-T interface card (BC, RJ45) ES1D2G48TBC0
Updated: 2019-08-19

Document ID: EDOC1000013755

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