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Adtran total access 1500 quad line interface unit Manual

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61180019L1-5A Issue 1, May 2004 11
NOTE
Omit step 4 if the alarmed piece of equipment
has its own source of –48 VDC and does not
need the –48 VDC feed from the Total Access
1500 19-Inch Chassis. The Total Access 1500
19-Inch Chassis expects to see –48 VDC on
pin A of the alarm pair when an alarm
condition exists.
4. Using a wire-wrap gun, wire wrap one wire to the
B pin of the Total Access 1500 alarm input header,
and the other end to the external unit alarm
terminal marked “B”.
5. Wire wrap one end of the second wire to the
A pin
of the Total Access 1500 alarm input header and
the other end to the external unit alarm terminal
marked “A”.
NOTE
Check with the manufacturer of the external
equipment for exact alarm nomenclature.
Network Connections
The Total Access 1500 System supports either DS1 or
DSX-1 network connections. The copper pair network
interface connects to the backplane at wire-wrap
connectors
P7, P8, P9, P10, and P11.
Network Management Connections
The Total Access 1500 19-Inch Chassis integrates
several different management ports on the backplane to
allow for remote management of the chassis. The
management interface is on the SCU discussed in detail
in the “Section 1, System Description” of the Total
Access 1500 System Manual (P/N 61180001L1-1).
Up to 32 shelves can be linked together on the RS-485
bus for management of those shelves from a single
management interface.
SW2, located in the upper left center of the Total Access
1500 19-Inch Chassis backplane, is used to enable/
disable the RS-485 bus. There is also a 3-pin wire-wrap
header,
P12, for connecting to the RS-485 interface.
Connecting the RS-485 Bus Between Shelves
Up to 32 shelves can be linked together for management
from a single shelf designated as host (the other shelves
will be configured as clients). This feature allows
conservation of valuable external management ports
within the CO and provides local or remote
management for up to 32 shelves from the craft
interface on front of the host SCU or from the remote
management port connections described in this section.
To connect the RS-485 bus between shelves, perform
the following steps:
1. Determine and cut the length of wire necessary to
reach from the RS-485 wire-wrap header,
P12, in
the first shelf in the chain to the RS-485 wire-wrap
header,
P12, in the second shelf.
Remember to allow for stripping the ends of the
wire, wire routing, and tying down in accordance
with CO SOP.
2. Using the wire-wrap tool, connect the shielded,
twisted pair interconnect wire to the RS-485 wire-
wrap header,
P12, on the host Total Access 1500
backplane. (See Figure 9).
3. Run the interconnect wire to the backplane of the
first client chassis. Connect the two conductors and
ground of the interconnect wiring to the RS-485
wire-wrap header,
P12, on the backplane of the
client chassis. (See Figure 9).
4. Enable the RS-485 bus by setting switch
SW2 to
the
EN position.
If there are more shelves to be connected, repeat steps 1
through 4 for each shelf to be added to the chain. Each
shelf after the first will be a client shelf on the daisy
chain. Only one shelf is designated as host on any daisy
chain of up to 32 shelves.
RS-232 SCU NMA Management Port
The Total Access 1500 System can send and receive
TL1 commands for NMA management over the X.25
packet switched network. The Total Access 1500 SCU
has a built-in X.25 PAD, and the chassis is ready to
connect to the network. Access to the network is via a
synchronous RS-232 connector,
J34, located in the
upper middle of the backplane. The following steps are
instructions for connecting the X.25 to the Total Access
1500 System.
1. Connect the DB-25 data cable male connector to
the
MGMT port, J34, on the Total Access 1500
backplane.
2. Connect the other end of the data cable to the
designated port of the X.25 switch.
… 11 …


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