User Manual

ManualsBrandsADC Telecommunications ManualsElectronicsDigivanceÂ® Long Range Coverage Solution 1900 MHz

ADCP-75-126 • Issue B • April 2002 • Section 5: Maintenance

Page 5-13

©

2002,

ADC

Telecommunications,

Inc.

11. Remove

the

dust

caps

from

the

optical

fiber

connectors.

12. Clean

each

connector

(follow

connector

supplier’s

recommendations)

and

then

insert

each

connector

into

the

appropriate

optical

port.

13. When

ready

to

put

the

unit

back

into

service,

place

the

On/Off

switch

in

the

ON

position

(press

I).

14. Notify

the

NOC

or

alarm

monitoring

service

that

the

system

is

going

back

online.

4.2.2 PORT 3 Loopback Test

1. Put

on

the

IR

filtering

safety

glasses.

2. Notify

the

NOC

or

alarm

monitoring

system

operator

that

the

system

is

going

offline.

3. At

the

HU

or

STM

(whichever

unit

is

being

tested),

place

the

On/Off

switch

in

the

OFF

position

(press

O).

4. Disconnect

the

optical

fiber

connectors

from

the

PORT

1

and

PORT

3

optical

ports

and

place

a

dust

cap

over

each

connector.

5. Plug

a

15

dB

in-line

optical

attenuator

into

the

PORT

3

optical

port.

6. Connect

a

patch

cord

between

the

optical

attenuator

and

the

PORT

1

optical

port.

7. Place

the

On/Off

switch

in

the

ON

position

(press

I)

and

observe

the

PORT

3

LED

indicator.

8. The

PORT

3

LED

indicator

will

turn

either

red

or

green.

If

the

LED

turns

yellow,

the

secondary

optical

transmitter

or

receiver

is

faulty.

Replace

the

unit

and

then

recheck

system

operation.

If

the

LED

turns

green,

the

optical

ports

are

good.

9. Place

the

On/Off

switch

in

the

OFF

position

(press

O).

10. Remove

the

optical

attenuator

from

the

PORT

3

optical

port.

11. Remove

the

dust

caps

from

the

optical

fiber

connectors.

12. Clean

each

connector

(follow

connector

supplier’s

recommendations)

and

then

insert

each

connector

into

the

appropriate

optical

port.

13. When

ready

to

put

the

unit

back

into

service,

place

the

On/Off

switch

in

the

ON

position

(press

I).

14. Notify

the

NOC

or

alarm

monitoring

service

that

the

system

is

going

back

online.

5 MAINTENANCE PROCEDURES

This

section

specifies

the

system

maintenance

requirements

and

provides

the

procedures

for

the

required

maintenance

tasks.

Refer

to

these

procedures

as

needed

when

specified

in

the

Scheduled

Maintenance

table.