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Installation and Setup
Table 2-5
Front Panel DTE HSSI Interface Connector Pinouts
Circuit
Pin No.
1, 7,13, 19,
102
25, 26, 32,
38, 44, 50
11, 36
103
4, 29
104
3, 28
107
8, 33
108/2
10, 35 (A)
143
12, 37 (B)
144
24,49
142
6, 31
114
9, 34
113
2, 27
115
Note
All other pins at this interface are for future use.
076R160-000
Issue 4
Circuit Name
Direction
No.
Signal Ground
Transmitted Data
To DCE
Received Data
From DCE
DCE Ready
From DCE
DTE Ready
To DCE
Loopback A
To DCE
Loopback B
To DCE
Test Mode
From DCE
Transmitter Timing
From DCE
(DCE)
Transmitter Timing
To DCE
(DTE)
Receive Timing
From DCE
(DCE)
SpectraComm 800 T3 Data Service Unit
Installation and Operation Manual
Installing the Unit in the Shelf
Description
Connects the DTE circuit ground to DCE circuit ground
providing a path between the DTE and DCE signal
commons.
Signals on this circuit are generated by the DTE and are
transferred to the local DCE for transmission of data to
remote DCE or for maintenance or control of the local DCE.
Signals on this circuit are generated by the DCE in
response to data signals received from the remote DCE, or
for maintenance or control purposes. In all systems, the
DCE does not transfer data to the DTE on this circuit unless
an ON condition is present on 107 (DCE Ready) and 108/2
(DTE Ready).
Signals on this circuit are used to indicate whether the DCE
is ready to operate. The ON condition indicates that the
DCE is ready to exchange data with the DTE.
Signals on this circuit are used to indicate whether the DTE
is ready to operate. The ON condition indicates that the
DTE is ready to exchange data with the DCE.
Signals on these circuits are used to request the loopback
test conditions as described below:
Interchange Circuits
Requested Loopback
143
144
OFF
OFF
None
ON
OFF
Local line
OFF
ON
Remote line
ON
ON
Local Digital
Signals on this circuit indicate whether the local DCE is in a
test condition.
Signals on this circuit are used to provide the DTE with
signal element timing information.
Signals on this circuit are used to provide the DTE with
received signal element timing information.
2-9
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