| Serial Communication Standards |
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Basics Devices that communicate over a serial interface are divided into two classes: DTE and DCE. The most important difference between these types of devices is that the DCE device supplies the clock signal that paces the communications on the bus. The documentation that came with the device should indicate whether it is DTE or DCE (some devices have a jumper to select either mode). If you cannot find the information in the documentation, use the following general guidelines to help you select the proper class: ----------------------------------------------------------------------- DTE DCE Selectable DTE or DCE* ----------------------------------------------------------------------- DEVICE Terminals Modems Hubs CSU/DSU Routers Multiplexors ----------------------------------------------------------------------- GENDER Male Female Either ----------------------------------------------------------------------- * Selectable devices usually have a jumper, switch, or software command used to select DTE or DCE. HDLC RS232 RS-232/V.24 pin out on a DB-9 pin (PC COM port) 
RS-232/V.24 pin out on a DB-25 pin 
RS-232D with RJ-45 connector 
V.35 V.35 cable connector pin layout 
RS485 HSSI SCSC-II connector 
HSSI cable 
USB Universal Serial Bus USB Links |
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© 2002 Manohar Bangera, All rights reserved. |
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