Multitech MT5600BLV.90 Benutzerhandbuch

CGND

1

GND

CGND is tied common to GND on the modem’s PCB.

TD

2

  The DTE uses the TD line to send

data to the modem for transmission over the telephone
line or to transmit commands to the modem.

RD

3

Received Data  The modem uses the RD line to send
data received from the telephone line to the DTE and to
send modem responses to the DTE.

RTS

4

Request to Send  The RTS signal is used for hardware
flow control.

CTS

5

Clear To Send  CTS is controlled by the modem to indi-
cate whether or not the modem is ready to transmit data.
CTS high indicates to the DTE that signals presented on
TD will be transmitted to the telephone line. CTS low in-
dicates to the DTE that it should not transfer data across
the interface on TD.

DSR

6

Out

Data Set Ready  DSR indicates modem status to the
DTE. DSR low indicates that the DTE is to disregard all
signals appearing on the interchange circuits except
Ring Indicator (RI). It reflects the status of the local data
set, and does not indicate an actual link with any remote
data equipment.

GND

7

GND

Ground.

CFLO

8

CD

Carrier Detect  The modem uses the CD line to signal
to the DTE that a carrier has been detected.

+12V

9

A positive voltage output from the modem used for tests
or for strapping signals high if needed.

10

NC

11

NC

12

NC

13

NC

14

NC

TCLK

15

TC

Transmit Clock  Output from modem, used in syn-
chronous mode.

16

NC

RCLK

17

RC

Receive Clock  Output from modem, used in synchro-
nous mode.

V54-2

18

AL

Analog Loop  Input to modem to enable analog loop test.

19

NC

DTR

20

DTR

Data Terminal Ready  Input to modem from DTE to
control answering and disconnection of modem.