Denso BHT-7500W, BHT-7500S user manual Interface Cable Connection, DTE and DCE

Chapter 5. Handling the CU-7000 (Option)

[ 2 ] Interface Cable Connection

As illustrated below, connect the CU-7000 (on which the BHT is put) to a host computer with a cross-mode cable. To connect it to a modem, use a straight-mode cable.

CU-7000

(DTE)

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8

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Host Computer

(DTE)

FG

SD

RD

RS

CS

DR

SG

CD

ER

Cable Connection between CU-7000 and Host Computer

CU-7000

(DTE)

1

2

3

4

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8

20

Modem

(DCE)

FG

SD

RD

RS

CS

DR

SG

CD

ER

Cable Connection between CU-7000 and Modem

DTE and DCE

In the RS-232C interface specifications, the DTEs (Data Terminal Equipment) shall be generally connected with each other by a cross-mode cable; the DTE and DCE (Data Circuit-terminating Equipment) shall be connected with each other by a straight-mode cable.

The DTE is one piece of equipment connected at both ends of a communications line as a sender or receiver of data (such as CU-7000 on which the BHT is put and a host computer).

The DCE is one piece of equipment connected to the intermediate point between the DTE and the communications line. It terminates communications lines and exchanges information between those lines without any change in contents (such as modem).

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