This can be time consuming, but often provides a good cable provided a few precautions are adopted.Ī second approach is to use an insulation displacement style cable. The most straightforward is to have two solder type connectors and to wire between them, one to one. There are several methods that can be used to construct RS232 cables and the method chosen should be selected according to the requirements, cost timescales, level of reliability, etc. Some cables could have more connections for additional functionality, but these are rarely used. The RS232 cable shown above gives the more likely connections seen in an RS232 cable.
SMART SERIAL DTE CABLE USE SERIAL
According serial data cables for these systems require the additional lines to be incorporated into the serial data cables for them to operate correctly. More comprehensive systems may utilise the additional lines provided by RS232. RS232 serial data cable using minimum number of connections These systems require serial data cables that incorporate the transmit and receive data lines as well as an earth line.
SMART SERIAL DTE CABLE USE SOFTWARE
These systems may utilise the use of software codes such as X-ON / X-OFF, ACK, NAK, etc to provide the handshaking that is required. Some of the simpler systems just send the data without any hard wired handshaking and as a result the serial data cables required for this are very simple.
Serial data cable diagrams and pin connectionsĭifferent data systems utilise different levels of handshaking when using RS232. It also saves considerable complications by not having to work out which wires to cross over in the serial data cable.Ĭomplications do arise when cables are required to connect two items both configured as the same form of equipment, i.e. Similarly The DTE receives data on pin 3, whereas the DCE transmits on pin 2.Īdopting this approach makes the construction of RS232 serial data cables much easier. Thus a DTE transmits data on pin 2 and the DCE receivers data on pin 2. on where pin number X at one end is connected to pin number X at the other end and there are no crossovers. Pins are assigned within the DTE and DCE such that a "1:1" cable should be used, i.e. As a result it may often be necessary to experiment a little.
As a result it is always best to be aware of the complications that exist. DCE (Data Communications Equipment or Modem) and the DTE (Data Terminal Equipment or teleprinter).Īlthough many manufacturers agree on the general application of the types of RS232 serial data cables, there is still confusion in many quarters over what may be required. This intended application for RS232 gives rise to the terminology associated with these serial data connections, i.e. In addition to this, further confusion is caused by the fact that RS232 was designed to connect modems and terminal devices or teleprinters so that telephone lines could be used to transit data over the telephone system, and serial data cables were required to connect the equipment at the remote end. As a result, designs for a variety of serial data cables may be seen on the Internet and elsewhere. When constructing a cable, it should be remembered that not all the signals provided within RS232 need to be implemented in a practical RS232 data cable.
These cable can take a variety of forms in terms of the physical methods used for construction as well as the number of connections that are incorporated within the overall RS232 cable. Whenever RS232 is used, RS232 cables will be needed to provide the required electrical connection. Serial Data standards: Serial data standards RS422 RS449 RS485 20 mA current loop
RS232 basics RS232 standard Software handshaking Signals & voltage levels Pinouts & connectors Loopback connections RS232 cables After receiving your payment, we will leave a positive feedback on Ebay and ship the item(s) within 12 hours.RS232 Cables: wiring & pin connections Wiring and constructional details for RS232 serial data cables: pin connections DB9 (9 way) & DB25 (25 way). Each cable is an equivalence of putting a Cisco V.35 DTE & a V.35 DCE cable together! DCE Smart Serial to DTE Smart Serial (WIC-2T) DTE & DCE labeled on the cable Please view my Seller's other auction Or Click about me Payment: We accept PayPal Payment Credit Card Online ( VISA / MASTER ) Shipping: Airmail: US$6 or Registered Mail: US$8 or USPS / EMS for 3-4 days : US$22 to US We offer combine shipping or ship by FedEx, quotation can be given upon request. Brand * New * in bag 3FT LONG DTE DCE BACK TO BACK CROSSOVER CABLE CAN BE USED TO CONNECT TWO TO MORE CISCO ROUTER This is our Factory Made Cable & not From Cisco BUILD UP YOUR LAB FOR CCNA, CCNP & CCIE For Lab Training Such as BGP4, FrameRelay, EIGRP, OSPF. Objectnummer: 112100342503 Smart Serial DTE DCE Back to Back Cable 4 Cisco WIC-2T HWIC-2T HWIC-1T WIC-2A/S.