Specifications

Appendix A Interface Connector Specifications ASMi-52 Installation and Operation Manual
A-2 DTE Interface Connectors
V.35 X.21 Description
34-Pin
DB-15
Signal
Function
Pin Circuit Pin Circuit
(Function)
Data Terminal
Ready
H DTR 108 Not used
Carrier Detect F DCD 109 5
12
I(A)
I(B)
(Indication)
A positive level from ASMi-52, except when a
loss of the received signal is detected or when
Data Set Ready is negative.
External
Transmit Clock
U
W
SCTE(A) 113
SCTE(B) 113
7
14
(A)
(B)
A serial data rate clock input from the data
source. Positive clock translations must
correspond to data transmissions.
Transmit Clock Y
a
SCT(A) 114
SCT(B) 114
6
13
S(A)
S(B)
(Signal
Timing)
A transmit data rate clock for use by an external
data source. Positive clock translations
correspond to data translations.
Receive Clock V
X
SCR(A) 115
SCR(B) 115
A receive data rate clock output used by an
external data sink. Positive clock translations
correspond to data translations.
Local Analog
Loop
L and j A control signal input, which, when on, sets
ASMi-52 into Local Analog Loopback
(V.54 Loop 3).
Remote Digital
Loop
N and h A control signal input which, when on,
commands ASMi-52 to send a remote Loopback
command (V.54 Loop 2) to the remote ASMi-52.
Test Indicator n and k A Control Signal output from ASMi-52; positive
during any test mode.
Ethernet Connector
Table A-2. Ethernet Connector Pinout
Pin Function
1 Tx+
2 Tx–
3 Rx+
4, 5 –
6 Rx–
7, 8 –