C Rs-530 Signals And Pin Assignments - Canoga Perkins 2240 User Manual

Table 4-C.
RS-530 Signals and
Pin Assignments
#
Pin A/B
FG 01
TD 02/14
RD 03/16
RTS 04/19
CTS 05/13
DSR 06/22
SG 07
DCD 08/10
SCR 17/09
SCT 15/12 *
SCTE 24/11
DTR 20/23
LL 18 **
RL 21 **
TM 25
* Becomes extra clock input if SCT switch is set to IN position.
** These signals are single ended and activate a modem's system test.
All other signals are balanced.
Two end-to-end control leads are provided as part of this interface. An input to
RTS (Request To Send) is transmitted to the DCD (Data Carrier Detect) output at
the other end of the link (refer to Sections 4.4.1, "RTS-Bias Jumper," and 4.4.2,
"DCD Jumper"). The factory setting (refer to Section 4.4.7, "CTS_OUT Jumper")
configures CTS as a local control. In this mode, CTS (Clear To Send) follows
RTS locally but is delayed approximately 1 millisecond when RTS turns ON (refer
to Section 4.4.6, "C,TS_GATE Jumper"). Changing the CTS_OUT jumper
enables the second DTR to CTS control channel. In addition, the CTS (A) jumper
allows configuring the CTS(A) output lead for cryptography applications (refer to
Section 4.4.8, "CTS (A) Jumper").
Signal Name
Frame Ground
Transmit Data
Receive Data
Request to Send
Clear to Send
Data Set Ready
Signal Ground
Data Carrier Detect
Receive Clock
Transmit Clock
External Tx Clock
Data Terminal Ready
Local Loopback
Remote Loopback
Test Mode
2240 Fiber Optic Modem
Direction
-
to modem
from modem
to modem
from modem
from modem
-
from modem
from modem
to/from modem
to modem
to modem
to modem
to modem
from modem
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