ADTRAN 1500 Especificaciones descargar pdf (Pagina 6)

6 61180001L1-5BSection 61180001L1-5, Issue 2

The power bus and frame ground route to all the cards

in the shelf.

The number of shelves that can be placed in a 7-foot

central office rack depends on the type of service

deployed and the number of access modules in the

shelf.

After connecting and checking the ground to the Total

Access 1500 shelf, connect power to the shelf. Check

to make sure your power source is providing the

correct power and polarity to the shelf. To connect

power to the shelf:

1. Determine which fuse pairs are to supply power to

the Total Access 1500 shelf.

2. Remove the fuses from the A and B slots for the

pair.

3. The power terminal is labeled TB1. Cut four

lengths of appropriately sized wire to reach from

the terminals on the fuse and alarm panel to the

power terminals on the Total Access 1500 shelf.

4. Using the crimping tool, connect an appropriate

lug to each end of the wires.

5. Using a screwdriver appropriate for the fuse and

alarm panel terminals, and a straight slot or

Phillips screwdriver for the Total Access 1500

power terminal, connect the ends of one wire

between the “A” CO -48 Vdc supply and the “-48

Vdc PRIMARY IN” terminal on the Total Access

1500 backplane.

6. Connect three more power wires, connecting the

“A” CO -48 Vdc return with -48 Vdc PRIMARY

RTN; “B” CO -48 Vdc supply with -48 Vdc

SECONDARY IN; and “B” CO -48 Vdc RTN

with -48 Vdc SECONDARY RTN.

Apply Power and Check Voltage

Before proceeding further, ensure that power has been

correctly applied to the shelf. The proper voltage to

Total Access 1500 is -48 Vdc, with an operating range

of -42 Vdc to -56 Vdc.

WARNING

Installing fuses in the fuse alarm panel at this

stage will provide power to the shelf. There will

be power to pins on the backplane and inside the

shelf. Exercise caution to avoid electric shock.

NOTE

The chassis may be powered by multiple power

sources. Disconnect all sources prior to servicing.

NOTE

The branch circuit overcurrent protection shall

be a fuse or circuit breaker rated for a maximum

of -48 Vdc @ 5.0A. Include the appropriate input

current rating for the product.

1. Install appropriate fuses (5 AMP max) in the slots

in the fuse and alarm panel that services the Total

Access 1500 shelf.

2. Using a voltmeter, place the common (normally

black) lead on the TB1 -48 Vdc PRIMARY RET

terminal and the DC volts (normally red) lead on

the TB1 -48 Vdc PRIMARY IN terminal. The

reading should be in the operating range of

-42 Vdc to -56 Vdc, with a nominal value of -48

Vdc. Note the “–” polarity.

3. Using a voltmeter, test the connection using the

TB1 -48 Vdc SECONDARY RTN terminal and

the TB1 -48 Vdc SECONDARY IN terminal.

4. Remove the fuses from the fuse and alarm panel

slots that provide power to the Total Access 1500.

Data Connections

An external composite clock input is required in the

Central Office Terminal (COT) when deploying

services from Total Access 1500. The following steps

provide instruction on how to wire external composite

clock to a single Total Access 1500.

1. Determine the “+”, “–” and drain or ground wires

from the CO clock source.

2. Using wire strippers, strip 1 to 1 1/2 inches of the

insulation from the end of the clock source

twisted pair, shielded, drop wire.

3. Using the wire-wrap tool, wire-wrap the “+” wire

from the clock source to the pin marked “+” on

connector P14, “CLK IN.”

4. Wire-wrap the “–” wire from the clock source to

the pin marked “–” on connector P14, “CLK IN.”

5. Wire-wrap the drain or shield wire from the clock

source to the pin marked “

” on connector P14,

“CLK IN.”

6. Tie the clock source wire neatly to the frame.

7. On SW1 mounted to the left of P14, move the

switch to the “IN” position.

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ADTRAN 1500 Especificaciones Pagina 6

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