A Rs-232D Pinouts - Canoga Perkins 2240 User Manual

Table 4-A.
RS-232D
Pinouts
Data Set Ready (DSR) and Test Mode (TM) are local status leads and follow the functions
described in RS-232D. DSR typically indicates that the modem is ready to handle transmit
data. During loopbacks, the behavior of this signal is dependent on the position of the DSR
jumper (see description of DSR jumper). TM indicates that a loopback is active on one or
both modems.
Local Loopback (LL) and Remote Loopback (RL) are loopback control leads and perform
the same functions as the 2240 front panel LOOP switch LOC and REM positions. LL and
RL are interface signal inputs which can be used to activate the LOC or REM loop func-
tions.
Pin RS-232D
Number Pin Name
(abbrev)
1 PG
2 TD
3 RD
4 RTS
5 CTS
6 DSR
7 SG
8 DCD
12 SDCD
13 SCTS
14 STD
15 SCT
16 SRD
17 SCR
18 LL
19 SRTS
20 DTR
21 RL
22 RI
23 DSRS
24 SCTE
25 TM
Full Name
Protective Ground
Transmit Data
Receive Data
Request to Send
Clear to Send
DCE Ready
Signal Ground
Receive Line Sig. Det.
Secondary Line Sig. Det.
Secondary CTS
Secondary TD
Transmit Clock
Secondary RD
Receive Clock
Local Loopback
Secondary RTS
DTE Ready
Remote Loopback
Ring Indicator
Data Signal Rate Selector
Transmit Clock External
Test Mode
2240 Fiber Optic Modem
Direction
-
to modem
from modem
to modem
from modem
from modem
-
from modem
from modem
from modem
to modem
from modem
from modem
from modem
to modem
to modem
to modem
to modem
from modem
to modem
to modem
from modem
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