Section 100-421-100
Revision 05
Page 4
7.04
Current feed jumpers: See Figure 4.
List 1 & 2 HRU Connections: When the List 1
or 2 HRU-412 is being inserted into the HRE-
421, jumper TB1 terminals 11 through 14 as required
by the service order to provide none, 23 mA or 60 mA
current feed toward CPE over the DS1 leads.
List 3 ,4, 6 and 7 HRU Connections: When
the List 3, 4, 6 or 7 HRU-412 is being inserted
into the HRE-421, TB1 is not required to set the CPE
current. For these units the CPE simplex terminal
must be left vacant. This allows switch S2 located on
the card edge connector at the back of these units to
set the current either 60 or 0 mA., as required by the
service order.
7.05
RS-232 Connections: Connector J2 wiring is
shown in Figure 7. J2 is configured as an RS-
232 DTE port. TD and RD are the names assigned to
the pins per this RS-232 standard. The signal on RD
is
an input to HiGain. That on TD is an output from
HiGain. The port requires only pins 2, 3 and 5 to be
connected. Typical connections to both DB 9 and DB
25 DTE terminal connectors are shown in Figure 7. J2
provides access to a local diagnostic terminal.
8. TURN UP
8.01
Refer to the PairGain Technical Practice
Section of the unit being installed150-412-100
for complete instructions. The HRU card slides into
the two card guides as shown in Figure 3. It should
be seated firmly in the connector. Upon initial turn
up, all LEDs will momentarily light. If all equipment is
installed and working, and the DS1 signal is being
transmitted, the system will cold start within about 15
seconds. No further action is required if all alarms
clear.
Figure 2. Wall Mounting.
