RAD Data comm ASMi-31 User Manual

Page 59

ASMi-31 Installation and Operation Manual

Appendix D. DTE Interface Connectors

General

D-3

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

External
Transmit
Clock

19
16

U SCTE(A) 113
W SCTE(B) 113

DA(A)

DA(B)

24
11

(A)*

(B)*

A serial data
rate clock input
from the data
source. Positive
clock
transitions must
correspond to
data transitions.

Transmit
Clock

14
10

Y SCT(A) 114
A SCT(B) 114

DB(A)

DB(B)

15
12

S(A)

S(B)

[SIGNAL
TIMING]

A transmit data
rate clock for
use by an
external data
source. Positive
clock
transitions
correspond to
data
transitions.

Receive Clock

22
23

X SCR(B) 115
V SCR(A) 115

DD(A)

DD(B)

A receive data
clock output
for use by
external data
sink. Positive
clock
transitions
correspond to
data
transitions.

Local Analog
Loop

L and j

141

A control signal
input; when
on, commands
ASMi-31 into
Local Analog
Loopback
(V.54 Loop 3).
See Table 2-1.

Note

* Unassigned pins according to X.21 standard.

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