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Interface - Telecom

BCM57711EA0KPBG is an advanced quad-port Ethernet transceiver with integrated SerDes for 10GBase-KR utilising technologies from Broadcom. It combines Ethernet, Serialiser/ Deserialiser (SerDes) and Fibre Channel technologies. These devices are intended primarily for storage area networks, but they may also be used in other heterogeneous systems. The product provides an integrated 10GBase-KR physical layer transmit/receive function along with a variety of host interface options.

The BCM57711EA0KPBG transceiver has four ports, each one corresponding to a single 10GBase-KR lane. The four ports can together provide a bandwidth of up to 40 Gbps. The transceiver uses a variety of interface options and protocols, ranging from 10G Fibre Channel to SerDes to 10G Ethernet. The product also features integrated Ethernet PHY and Fibre Channel SerDes functions.

Application Field

BCM57711EA0KPBG transceivers are typically deployed in storage area networks such as SANs, NAS and DAS systems, where users need efficient, cost-effective and high-performance data transmission. The product can be used in both enterprise and service provider networks, and is also suitable for cloud computing services. Additionally, this transceiver is used in other electronic products that require high-speed data rates.

Working Principle

The BCM57711EA0KPBG transceiver works on the principle of multiplexing the data stream into two lower-rate streams, each of which is then processed separately. This process is known as time-division multiplexing (TDM). The four 10GBase-KR lanes which combine to provide the 40 Gbps bandwidth are all TDM’d together with a maximum of 20 Gbps (5 Gbps on each lane).

At each 10GBase-KR port, the incoming data stream is first decoded, then the associated FIFO buffers are populated, and then the data is retransmitted across the associated link. The transceiver also supports automatic link negotiation in order to ensure that the desired speed is maintained during full-duplex transmissions.

The BCM57711EA0KPBG transceivers also support Ethernet media access control (MAC) layer and can handle up to 256 Ethernet connections at a time. Additionally, the product can support up to 256 Fibre Channel connections on a single port. This allows the user to use multiple transceivers in an Ethernet or Fibre Channel based SAN environment.

When the signal is received, it passes through the SerDes and varies its amplitude as it passes through an optional signal-conditioning circuit. The signal control circuitry can be programmed to control the signal modulation and receive quality. This is known as digital signal processing (DSP). The signal is ultimately received and the received digital data is then stored in the FIFO buffers for retransmission.

The BCM57711EA0KPBG is a versatile transceiver that can be used in a variety of applications. With its integrated Ethernet PHY and Fibre Channel SerDes functions, it provides high-performance data transmission for storage area networks and can be used in both enterprise and service provider networks.

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