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Connecting Rear
Redundant Modules
To enable the BITS clock, you must make the following jumper settings on the STX
module:
JP9 (1-5)
JP9 (2-6)
JP9 (3-9)
JP9 (4-10)
For information about how to select the BITS clock as the source for system
timing, see "Managing the System Clock" in Chapter 5.
The following PathBuilder S700 modules are available in either front-connecting or
rear redundant models:
DS3/E3 UNI
n
DS1/E1 UNI with Inverse Multiplexing for ATM (IMA)
n
DSX-1/E1 CBR
n
Figure 27 illustrates the locations of the connectors on the rear of the unit.
Figure 27 PathBuilder S700 Rear Connectors
Slot 18
Port 2
TX
DS3/E3
RX
TX
Port 1
RX
DS3/E3
Slots 16-18
Slots 13-15
Slots 10-12
Slots 7-9
When connecting rear redundant modules, follow these guidelines:
Connect DS3 UNI or E3 UNI modules to DS3 or E3 repeaters using the pair of
n
BNC connectors corresponding to the slot(s) in which you have the DS3/E3 UNI
module(s) installed. For example, if you had a DS3 UNI module installed in slot
7, you would use the connectors in the third column from the right. For this
release, use only the bottom two rows of connectors; the top two rows are
reserved for future expansion.
Connect DS1/E1 UNI or DSX-1/E1 CBR modules to the pair of Telco connectors
n
corresponding to the slot(s) in which the module(s) are installed.
Step 4: Connect I/O Cabling and Wiring
Slot 5
Slots 1-4
10BaseT
SLIP
RS-232
Reserved
for later use
53
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