Connect data modules
Issue 4 October 2002
59
555-233-116
Adjusting the control-panel display on the 7400A
1. Adjust the contrast of the display so that you can see it comfortably. Press
the ENTER/YES button. This steps you through the available contrast
settings.
7400A data module, EIA RS-232 interface circuits
The data module communicates with other equipment through a configurable, 25-
pin RS-232 serial interface. DCE and DTE operation use different sets of pins and
assign different functions to some of the same pins. To avoid confusion later on,
please take a moment to review the differences. See the table below (the pins
most discussed in subsequent sections have been emphasized).
D
T
R
D
S
R
R
I
D
C
D
R
T
S
C
T
S
T
D
R
D
HOME
POWER
TEST
0
0
—
0
0
0
—
—
DATA
NEXT/NO
BACK
ENTER/YES
✹
7400A Data Module
✹
❍
❍
❍
0
0
—
0
0
0
—
—
DATA
NEXT/NO
BACK
ENTER/YES
●
❍
❍
➜ ●
Push the button indicated by the arrow (
➜
)
Pin
Name
Function
DCE
DTE
1
— Not
used
—
—
2
BA (TD)
Transmitted Data
Input
Output
3
BB (RD)
Received Data
Output
Input
4
CA (RTS)
Request to Send
Input
Output
5
CB (CTS)
Clear to Send
Output
Input
6
CC (DSR)
Data Communication Equipment Ready
Output
Input
7
AB (SG)
Signal Ground
Common
Common
8
CF (RLSD)
Received Line Signal Detector
Output
Input
Continued on next page
Содержание MultiVantage
Страница 6: ......
Страница 14: ...Contents 555 233 116 14 Issue 4 October 2002 A Connector and cable pinout charts 231 IN Index 243...
Страница 24: ...About this book 555 233 116 24 Issue 4 October 2002...
Страница 120: ...DEFINITY LAN gateway system 555 233 116 120 Issue 4 October 2002...
Страница 134: ...Terminal server installation 555 233 116 134 Issue 4 October 2002...
Страница 162: ...ISDN converters and adapters 555 233 116 162 Issue 4 October 2002...
Страница 172: ...Busy tone disconnect equipment for non U S installations 555 233 116 172 Issue 4 October 2002...
Страница 178: ...Call detail recording CDR option settings 555 233 116 178 Issue 4 October 2002...
Страница 188: ...DEFINITY INADS 555 233 116 188 Issue 4 October 2002...
Страница 196: ...Music on hold 555 233 116 196 Issue 4 October 2002...
Страница 224: ...Multimedia communications products MMCX MMCH ESM 555 233 116 224 Issue 4 October 2002...
Страница 242: ...Connector and Cable Pinout Charts 555 233 116 242 Issue 4 October 2002...