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10 61180001L1-5BSection 61180001L1-5, Issue 2

Network Management Connections

The Total Access 1500 shelf integrates onto the

backplane several different management ports to allow

for remote management of the shelf. The management

interface is on the System Controller Unit (SCU)

discussed in detail in the System Description section

of the Total Access 1500 System Manual.

Up to 16 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 center of the Total Access

1500, is used to enable/disable RS-485. There is also

a 3-position wire-wrap header, P12, for the RS-485

interface.

Connecting the RS-485 Bus Between Shelves

Up to 16 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 16 shelves from the

craft interface on front of the host SCU, or from the

remote management port connections described in this

section. The following steps are instructions for

connecting the RS-485 bus between shelves.

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, routing the wires out to

the right side of the shelf to the frame, 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 6).

3. Run the interconnect wire to the backplane of the

first client shelf. Using the wire-wrap tool, connect

the two conductors and ground of the interconnect

wiring to the RS-485 wire-wrap header, P12, on the

backplane of the client shelf. (See Figure 6)

If there are more shelves to be connected, repeat steps

1 through 3 for each shelf to be added to the chain.

Each shelf after the first will be a client shelf on the

daisy chain. It is important to note that there is only

one shelf designated as host on any daisy chain of up

to 16 shelves.

RS-232 SCU Comm Port

The Total Access 1500 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 shelf is ready to connect to

the network. Access to the network is via an 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.

1. Connect the DB-25 data cable male connector to

the NTWK 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.

NOTE

The CO X.25 network administrator must

configure the X.25 switch for the Total Access

1500 shelf, accomplishing tasks such as

assignment of an LDN number for the shelf.

Connect 10BaseT

The Total Access 1500 can provide SNMP

management capability over Ethernet. Access to the

network is via a RJ-45 10BaseT connector, J33, labeled

“Ethernet,” located on the upper right side of the

backplane.

To connect the Total Access 1500 shelf to the Ethernet

ring, simply plug the male RJ-45 modular connector

into the female RJ-45 port on the Total Access 1500

backplane. When planning your cable run to the Total

Access 1500 shelf, be sure to allow enough cable for

routing the cable to the right from the backplane

connector to the frame, and for neat tie-off in

accordance with CO SOP.

Connect to Pair Gain Test Controller (PGTC)

Use a straight through 50-pin Amp cable to connect the

Pair Gain Test controller to the PGTC interface (P5) of

the Total Access 1500. P5 accepts a female connector.

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