The Hardware
80-10200000-01
2–3
2.3 Interface Pin Assignments
2.3.1 User and Link
Pin assignments of the USER and LINK connectors will vary with the
interface module type.
The USER ports are configured as physical DCEs and the LINK ports are
configured as physical DTEs. Their pin assignments are:
V35 operation
Pin
Circuit
Signal
A
101
Protective Ground
B
102
Signal Ground/Common Return
C
105
Request to Send
D
106
Clear to Send
E
107
Data Set Ready
F
109
Data Channel Received Line Signal Detector
H
108
Data Terminal Ready
J
125
Calling Indicator
K
-
Unused
L
141
Local Loopback
M
-
Unused
N
140
Loopback/Maintenance Test
P
103(A)
Transmitted Data A
R
104(A)
Received Data A
S
103(B)
Transmitted Data B
T
104(B)
Received Data B
U
-
Unused
V
115(A)
Receiver Signal Element Timing A
W
-
Unused
X
115(B)
Receiver Signal Element Timing B
Y
114(A)
Transmitter Signal Element Timing A
Z
-
Unused
AA
114(B)
Transmitter Signal Element Timing B
BB - HH
Unused
JJ
Unused
KK
Unused
LL
Unused
MM
-
Unused
NN
142
Test Indicator
Summary of Contents for SmartSwitch SBU128
Page 3: ...SBU128 User Manual 80 10200000 01 iii History Sheet 80 10200000 01 V1 00 Software 31 July 1998...
Page 74: ...SBU128 User Manual 80 10200000 01 11 2 11 1 Configuration Menu...
Page 75: ...Command Maps 80 10200000 01 11 3...
Page 76: ...SBU128 User Manual 80 10200000 01 11 4 11 2 Operation Menu...