??? 02/05/10 15:53 Read: times |
#172918 - DCE = Modem Responding to: ???'s previous message |
Anything else is (or should be) a DTE.
So, if you're connecting 2 pieces of equipment together, and neither of them is a modem, they should both be DTEs - and a Null-Modem cable should be required. RxD is an output from a DCE (modem); it is the data that the DCE (modem) has received, and is forwarding to the DTE - therefore, RxD is an input to a DTE. Conversely, TxD is an input to a DCE (modem); it is the data that the DCE (modem) will transmit, after receiving from the DTE - therefore, TxD is an output from a DTE. The easiest way to think of this is that "RxD" and "TxD" are the names of the circuits (Or connections) between the DTE and DCE - not as the names of the pins at the connectors: +------------+ +------------+ | | TxD | | | in+<----------------------+out | | DCE | | DTE | | out+---------------------->+in | | | RxD | | +------------+ +------------+ |
Topic | Author | Date |
DCE and DTE | 01/01/70 00:00 | |
DCE = Modem | 01/01/70 00:00 | |
Other RS232 Signals on connector | 01/01/70 00:00 | |
Terminal program | 01/01/70 00:00 | |
If it's not a DCE (modem), then it must be DTE | 01/01/70 00:00 | |
V.24: Definitions for interchange circuits between DTE & DCE![]() | 01/01/70 00:00 |