null modem cable = crossover cable ?

just wanted confirmation that a crossover cable is just another name for a null modem cable.
got that info from a few other sites.

can anyone confirm/or not ?.......thnx

Not the same mate, have a look on Wiki, decent explanation of both on there.
HH.

No

A null modem cable looks like a normal serial rs232 cable but some pins are crossed.
A crossover cable is an ethernet cable (network cable) again with some crossed wiring.
If you have a router/switch then a normal ethernet cable is fine

Just to elaborate a little...

A crossover cable is a CAT5/6 cable with RJ45 connectors - the transmit pairs on one end are connected to the receive pair pins on the other, and vice versa.

A null modem cable uses RS232 connectors (serial port stylee) and one end has the "clear to send" pin connected to the "ready to receive" at the other, and vice versa. I believe this is also known as "hardware flow control" in most terminal settings - each end indicates to the other that it is OK to send/receive data.

HTH

ashawo2007 said:

just wanted confirmation that a crossover cable is just another name for a null modem cable.
got that info from a few other sites.

can anyone confirm/or not ?.......thnx

Click to expand...

cross over cable is the ethernet cable and the null modem cable is fir the serail port

you don't need a cross over cable or a null modem just use your router (negates the need for cross over) and IFA. IFA 'listens' for a dbox boot and finds it independant of it's ip address, that's why you can use it for a kein system (bad flash). Run IFA and then plug in box and bingo

Most newer ETH ports will negotiate with out the need for a crossover cable... Null modem are still used, IF you can find a device that has a serial port.

paulcarter said:

No dude, those cables are not the same.

Click to expand...

The null modem cable is frequently called a crossover cable. It is used to allow two serial Data Terminal Equipment (DTE) devices to communicate with each other without using a modem or a Data Communications Equipment (DCE) device in between