Total Reach Office Channel Unit Data Port Installation and Maintenance Practice
6
61292006L1-5C
Span Power
Span powering is accomplished using
−
130 VDC measured from Tip to Ring. Voltage
measured from Ring to GND should indicate 0 V. Voltage measured from Tip to GND should
indicate
−
130 VDC or less, depending on voltmeter impedance.
Circuit Board DIP Switch (SW1)
The circuit board DIP Switch (see
) is used to provision the TR OCU DP and is set prior
to circuit board installation. Pushing the switches to the right (
ON
) enables the function. The
functions of SW1 are shown in the
Figure 3. Circuit Board DIP Switch SW1
−
Option Selection
Front Panel DIP Switch
The front panel DIP Switch (see
) is used to set the data rate. Pushing the switch to
the left (
ON
) enables the function. The Secondary Channel (SC) cannot be selected if circuit is
SW56 or 64 kbps. Only one data rate can be selected.
NOTE
If SW56 is selected, Error Correction must be
OFF
.
Figure 4. Front Panel DIP Switch
−
Rate Selection
SW1
ON
D4
1
1
1
O
N
O
N
O
N
2
2
2
3
3
3
4
4
4
5
5
5
6
6
6
7
7
7
8
8
8
SLC - 96 MODE I, III
SLC - 96 MODE II
ZERO CODE SUPPR
ERROR CORR
PROTECTED LBK
QUALITY MONITOR
A/B SIGNALING
