Devices that generate or transmit the data received and communications equipment and the data:

/>
full post:

DCE and DTE cable terminals standards. DCE and DTE cable terminals standards.

These reasons are no longer significant, but we end up with two cable types:. one for connecting a DTE to DCE, and one to connect two devices directly together

The DTE / DCE interface for a particular Standard defines the following specifications:
The DTE / DCE interface for a specific standard defines the following specifications:

mechanical and physical – the number of pins and connector type> br /> Electricity – sets the voltage levels for 0 and 1
function – Displays the functions carried out by assigning meanings to each of signal lines in the procedure interface
– Specifies the order of events for the transmission of data
The original RS-232 standard only defined the connection of devices with DCEs were modems that. However, if you have two DTE, such as two computers or routers want to produce in the laboratory, a special cable called a null modem eliminates the need for WFD. In other words, the two devices can be connected without a modem. A modem is a communication method to connect directly two DTE like a computer, a terminal or printer via a serial cable RS-232. With a modem transmit (Tx) and receive (Rx) lines are connected as shown in FIG.
The cable for connection to DTE DCE cable is a shielded transition series. The end router shielded serial transition, a DB-60, which connects to the port on a DB-60 WAN Interface Card series. The other end of the transition series is available with a connector to match the standard that must be used. Suppliers or WAN CSU / DSU usually dictates which type of cable. Cisco devices support EIA/TIA-232, EIA/TIA-449, V.35, X.21, and EIA/TIA-530 Standards series.
for higher port density in a compact format has, Cisco introduced a smart serial cable. The end of the router interface is a Smart Serial Cable 26-pin connector, which is much more compact than the DB-60 connector.
If you have a modem, note that connections require a synchronous clock signal. An external device can generate the signal, or the DTE may generate the clock signal. When a DTE and DCE are connected, the serial interface on a router, the DTE end of the connection by default, and the clock signal is typically provided by a related CSU / DSU or DCE device. However, if you a null modem cable connection in a router to router, one of the serial interfaces such as the DCE end shall be configured to the clock signal for the port.


Cisco Cable