HIRSCHMANN MS30-1602SAAEHC switch in stock

Brand

HIRSCHMANN/Germany

Application Areas

Medical & Health, Environmental Protection, Food/Agricultural Products, Road/Rail/Shipping, Comprehensive

Connection Methods of HIRSCHMANN Switches

HIRSCHMANN switches are a general term for technologies that, according to the needs of information transmission between communication ends, use manual or automated methods to send the information to be transmitted to the appropriate route that meets the requirements. Depending on the working location, they can be divided into WAN switches and LAN switches. A WAN switch is a device that performs information exchange functions in a communication system.

In computer network systems, the concept of switching improved the shared working mode. A HUB is a type of shared device. The HUB itself cannot identify the destination address. When host A in the same LAN transmits data to host B, the data packet is transmitted in a broadcast manner on a network based on the HUB architecture. Each terminal determines whether to receive the packet by verifying the address information in the packet header. That is to say, under this working mode, only one set of data frames can be transmitted on the network at the same time; if a collision occurs, it must be retried. This method is called shared network bandwidth. In layman's terms, a regular switch doesn't have management functions; it has one incoming line, and the other ports are connected to computers.

Connection methods of HIRSCHMANN switches (Germany):

1) Cut-through:

A cut-through Ethernet switch can be understood as a cross-connected telephone exchange with crisscrossing lines between ports. When it detects a data packet at an input port, it checks the packet header, obtains the destination address, uses an internal dynamic lookup table to convert it to the corresponding output port, and connects the input and output at the intersection, directly transmitting the data packet to the appropriate port, thus achieving the switching function. Its advantages are very low latency and very fast switching because it doesn't require storage. Its disadvantages are that because the data packet content is not saved by the Ethernet switch, it cannot check for errors in the transmitted data packets and cannot provide error detection capabilities. Because there is no buffer, it cannot directly connect input/output ports with different speeds, and it is prone to packet loss.

2) Store-and-forward:

Store-and-forward is a widely used method in the field of computer networks. It first stores the data packets entering the port, then performs a CRC (Cyclic Redundancy Check) check. Only after processing erroneous packets does it retrieve the destination address of the data packet, convert it using a lookup table, and send it out through the output port. Because of this, store-and-forward has a large latency in data processing, which is its drawback. However, it can perform error detection on incoming data packets, effectively improving network performance. Most importantly, it can support conversion between ports of different speeds, maintaining interoperability between high-speed and low-speed ports.

3) Fragment Isolation:

This is a solution between the previous two. It checks if the data packet length is at least 64 bytes. If it is less than 64 bytes, it is considered a spurious packet and is discarded; if it is greater than 64 bytes, it is sent. This method also does not provide data verification. Its data processing speed is faster than store-and-forward, but slower than cut-through.

Several Switching Technologies (Collapse)

1. Port Switching (Collapse)

Port switching technology first appeared in slot-type hubs. The backplane of these hubs is typically divided into multiple Ethernet segments (each segment is a broadcast domain), without bridges or routing connections; the networks are not interconnected. After a large master module is inserted, it is usually assigned to a segment on a specific backplane. Port switching is used to distribute and balance the ports of the Ethernet module across multiple segments on the backplane. Depending on the level of support, port switching can be further subdivided into:

· Module Switching: Migrating the entire module to a different segment.

· Port Group Switching: Ports on a module are typically divided into several groups, and each group of ports allows for segment migration.

· Port-Level Switching: Supports migration of each port between different segments. This switching technology is based on OSI Layer 1 and has advantages such as flexibility and load balancing capabilities. If configured properly, it can also provide a certain degree of fault tolerance, but it does not change the characteristic of sharing the transmission medium, and therefore cannot be called true switching.

2. Frame Switching (Folded)

Frame switching is currently the most widely used LAN switching technology. It provides a mechanism for parallel transmission by segmenting traditional transmission media, thereby reducing the collision domain and achieving high bandwidth. Generally, the implementation technology varies from company to company, but the processing methods for network frames typically include:

Cut-through switching: Provides line-speed processing capability. The switch only reads the first 14 bytes of the network frame and then transmits the network frame to the appropriate port.

Store-and-forward: Performs error checking and control by reading network frames.

The former method has a very fast switching speed, but lacks higher-level control over network frames, lacks intelligence and security, and cannot support switching between ports with different speeds. Therefore, manufacturers focus on the latter technology.

Some manufacturers even decompose network frames into fixed-size cells. This cell processing is easily implemented in hardware, has a fast processing speed, and can perform advanced control functions (such as the LET hub from MADGE) such as priority control.

3. Cell Switching (Folded)

ATM technology uses fixed-length 53-byte cells for switching. This fixed length facilitates hardware implementation. ATM uses dedicated, non-differentiated connections for parallel operation, allowing multiple nodes to be established simultaneously through a single switch without affecting communication between individual nodes. ATM also allows multiple virtual links between source and destination nodes to ensure sufficient bandwidth and fault tolerance. ATM uses statistical time-division multiplexing, significantly improving channel utilization. ATM bandwidth can reach 25Mbps, 155Mbps, 622Mbps, and even several Gbps. However, with the advent of 10 Gigabit Ethernet, ATM technology, once representing the future of network and communication technology, has gradually lost its relevance.

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Hirschmann, Hirschmann Switches, Ethernet Switches, Hirschmann, HIRSCHMANN, Germany

HIRSCHMANN, Hirschmann, HIRSCHMANN Switches, Hirschmann Germany

Full range of HIRSCHMANN products We specialize in Hirschmann sensors, Hirschmann switches, and more.

We offer a wide range of Hirschmann switches, including industrial switches.

Our company primarily deals in European and American brands and can source from any European country. Our key German brands include: BURKERT, DEMAG, HAWE, REXROTH, HYDAC, PILZ relays, FESTO, IFM sensors, E+H, HEIDENHAIN, P+F sensors, SICK, TURCK, and Hirschmann industrial switches. German brands: Hengstler, Murr, Schmersal, Samson, EPRO (Emerson Group)

American brands: MOOG, ASCO, MAC, NUMATICS, PARKER, VICKERS, ROSS

British brands: Norgren

Italian brands: OMAL, ATOS, CAMOZZI, UNIVER, Camozzi