Bedienungsanleitung Adtran total access 1500 (Seite 11 von 14) (Englisch)

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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.

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