RAD Data comm ASMi-31 - Manual (Page 58)

Appendix D. DTE Interface Connectors ASMi-31 Installation and Operation Manual
D-2 General
Table D-1 DTE Interface Signal Assignments (Cont.)
RS-232 V.35 EIA-530 X.21
Signal
Function
DB-25
Stand-
alone
and
Frame
DB-25
Frame
34-pin
Standalone
Pin Circuit
DB-25
Standalone
and Frame
Pin Circuit
DB-25
Frame
DB-15
Standalone
Pin Circuit/
(Function)
Description
Request to
Send 4 4 C RTS 105 4 CA(A)
19 CA(B)
4
19 3 C(A)
10 C(B)
[CONTROL]
A positive level
to ASMi-31
when data
transmission is
desired.
Clear to Send 5 5 D CTS 106 5 CB(A)
13 CB(B)
A positive level
from ASMi-31
with delay,
after receipt of
Request to
Send, and
when ASMi-31
is ready to
transmit.
Data Set
Ready 6 6 E DSR 107 6 CC(A)
22 CC(B)
A positive level
from ASMi-31
when the
power is on,
and ASMi-31 is
(a)not in the
DIGITAL
LOOP mode,
or (b) has not
received a
REMOTE
LOOPBACK
signal from the
remote unit.
Data Terminal
Ready 20 20 H DTR 108 20 CD(A)
23 CD(B)
Not used.
Carrier Detect 8 8 F DCD 109 8 CF(A)
10 CF(B)
8
10 5 I(A)
12 I(B)
[INDICATION]
A positive level
from ASMi-31,
except when a
loss of the
received signal
is detected, or
when Data Set
Ready is
negative.
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