Rs-423 pinouts for model mc1 – CANOGA PERKINS 2240 Fiber Optic Modem User Manual
Page 65
2240 Fiber Optic Modem
65
There are six end-to-end control lead pairs. They are listed with the input signal
listed first.
TD to RD
STD to SRD
DTR to RI
SRTS to SDCD
DSRS to SCTS
RTS to DCD
Note: If DTR to RI and STD to SRD are used on the RS232/RS366 port, these
control leads may not be available on 422/449 and V.35 interfaces.
Table 4-I.
RS-423 Pinouts
for Models
MC1 and MC2
Pin
RS-232
Direction
Number
Pin Name
(abbrev)
(full name)
1
PG
Protective Ground
-
2
TD
Transmit Data
to modem
3
RD
Receive Data
from modem
4
RTS
Request to Send
to modem
5
CTS
Clear to Send
from modem
6
DSR
DCE Ready
from modem
7
SG
Signal Ground
-
8
DCD
Receive Line Sig. Det.
from modem
12
SDCD
Secondary Line Sig. Det.
from modem
13
SCTS
Secondary CTS
from modem
14
STD
Secondary TD
to modem
16
SRD
Secondary RD
from modem
19
SRTS
Secondary RTS
to modem
20
DTR
DTE Ready
to modem
22
RI
Ring Indicator
from modem
23
DSRS
Data Signal Rate Selector
to modem
25
TM
Test Mode
from modem