![]() We hope to make mutual benefit relationship with you,and also expect to develop together with you!We are hoping to cooperate with you hand in hand to create a brilliant future. ![]() ![]() There are 290 workers in Vision at present including 20 technicians,10 R&D employees,and 30 management staff members.We have very sophisticated production techniques and powerful production capacity.Our products have a strong competition in Guangdong and sell well in USA,South America,Europe,Korea,and other markets.Vision commitment is strict delivery date and excellent service.Vision would like to help you win business because we have reliable product quality and timely supply. Vision was established in Jan,2010,located in Dongguan City.Covering an area of more than 4,000 square meters, we have become a well-known vendor at home and abroad due to strong development,excellent quality and perfect client service under the guidance of "union,progress,and innovation".Vision has obtained your high recognition and reputation. The StarTech SCNM9FF is an example of a null modem cable.Dongguan Vision Electronical Technology Co.,Ltd.mainly focuses on the Development,Production and Sale of accessories for computer,mobile device,our main product is mini dp cable,HDMI to VGA adapter,HDMI cable,HDMI splitter/switch,mini sas/compatible cable for cisco etc. Null modem adapters can also be used at the end of a straight-through serial cable to cross the lines. To enable handshaking between the two devices, the Request to Send (RTS) pin of one device must be connected to the Clear to Send (CTS) pin of the other device, and the Data Set Ready (DSR) pin is connected to the Data Terminal Ready (DTR) pin of the other. For this to work, the Transmit (TxD) pin of one device needs to be connected to the Receive (RxD) pin of the other device, and vice versa. Simple Null Modem CableĪ Null Modem or "crossover" cable is used to connect to DTE devices together. The StarTech MXT100FF is an example of a straight-through cable. The transmit and receive lines are not cross-connected in this case, hence the name. Simple Straight Through CableĪ straight-through or "one to one" cable is used to connect a DTE device (PC) to a DCE device (modem or other communications device). DTE normally refers to the serial port on a PC or terminal, while DCE refers to a modem or other type of communications device.ĭepending on the type of device on each end of the line, you either need a straight-through or a null-modem ("crossover") cable in order to communicate. Cisco Smart Serial Crossover Cable, 3ft IP Trading has sold its Cisco network equipment business to XS Network Tech. Once the cable has been successfully crimped on both. Normal WIC cards will not work with the 19 series routers and they require HWIC cards instead. Sometimes it’s easier to make the cable using certain colors in different spots. Cisco 1-Port Serial WAN Interface Card (HWIC-1T) This is a great card for any lab kit. The RS-232 specification defines two types of serial devices, DTE and DCE. In a standard T1 cable, wires 1,2 and 4,5 will be swapped at each end of the cable looking like the following As for the color of the wires that go into pins 3, 6, 7 and 8 these can be any color you choose. Straight Through Serial CableĬrossover or "Null Modem" vs.
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