#Cisco serial connector types how to#
#Cisco serial connector types full#

Prior to the introduction of this technology, telephone calls required dedicated physical links from the source to the destination which was expensive to implement. It was a technique first employed by Bell Laboratories to maximize the amount of voice traffic carried over a medium. Time division multiplexing is a technique employed in serial communications to split the bandwidth into slots so that simultaneous communication can happen between several devices. High Speed Serial Interface (HSSI) вЂ“ this standard supports speeds of up to 52Mbps, it can be used to connect LANs to WANs using high speed links such as the T3 lines.This cable is used to connect the DTE devices to modems and similar digital line devices. It combines the bandwidth of available on a couple of telephone circuits. V.35 вЂ“ this is the ITU standard for high speed serial communications.The figure below shows the connector that is used. This is the port that we use to configure a router from the PC. Some of the ways they are used include connection of PCs to printers, modems and other devices.

They are used in serial connections for a variety of purposes and not just limited to WAN connections. RS-232 вЂ“ this standard uses either 9 pin or 25 pin connectors.

The different standards used in serial communications use one of three standards when connecting LANs to the WAN. This makes them ideal for WAN communications. In the previously section we have seen that serial connections are less vulnerable to crosstalk, and since they require less wires, they are cheap to implement. In the previous chapter, we briefly discussed the various types of connectors used in the WAN. Therefore, the communication using serial cables is more efficient and can operate at higher frequencies. When using serial cables, the routers and other internetwork devices usually compensate for crosstalk before transmission of the bits. With parallel cables, the bundling can cause crosstalk and noise. These cables are also better insulated from noise and other forms of interference.

#Cisco serial connector types full#

The stream must wait until all bits arrive for a full byte to be transmitted.Д¬ommunication over serial connections requires fewer cables and wires as compared to that of parallel communications. The reason as to why this is the case is due to the fact that parallel communication need clocking to synchronize the arrival time of the bits. In our example above, the parallel line can send 6 times as many bits as the serial connection therefore it is theoretically faster. This is a major problem when communication is happening over long distances. However, timing in parallel communication means that all the bits must arrive at the destination at the same time. In serial communication, we can have only 1 bit transmitting at a time, while parallel communication the communication is much more efficient. The figure below shows the difference between serial and parallel transmission of data. When the distance increases, we use serial communication whereby the electrical signals are converted to a form that can be transmitted over serial links. In our computers, the distance between two points is short and therefore parallel communication is used. When communicating data, there are two types of transmissions that can be used parallel and serial communication.

#Cisco serial connector types how to#

We will then explore the default encapsulation on CISCO routers which is HDLC and finally discuss how to troubleshoot a serial connection. In this chapter, we will discuss serial links and the physical connections we use. You'll find many custom optionsВ such as plenum rated jackets and angled hoods.In the last chapter, we discussed some of the concepts that make the WAN work, we briefly described some of the protocols in the WAN. We also offer console cables and console kits. Stonewall Cable manufactures an extensive line of Cisco cablesВ at our New Hampshire facility including router cables, encryption cables, fiber optic cables, HSSI cables, and RJ21 cables.