Fiberplex WDM16, User Manual

Power

Redundancy

In

order

to

remain

functional,

even

in

the

event

of

component

failures,

the

WDM

employs

the

following

redundancies:



Two

power

supply

slots,

with

load

equalizing

and

protection

circuitry

on

the

backplane.

Each

supply

has

thermal

and

overcurrent

protection.



Each

channel

has

its

own

independent

power

supply

that

runs

off

of

the

main

power

rails,

so

that

a

failure

in

one

channel

will

leave

the

others

operational.



There

is

a

microprocessor

in

the

unit,

but

its

function

is

purely

monitoring.

If

it

fails,

the

data

will

continue

to

flow

unimpeded

on

all

optical

channels.



There

are

two

independent

fan

control

channels,

and

two

cooling

fans

on

each

side

of

the

unit.

Differences

between

WDM16,

WDM8A

and

WDM8B

The

functional

and

physical

characteristics

of

the

WDM16,

WDM8A

and

WDM8B

are

largely

identical.

The

single

differentiator

is

the

number

of

Active

Wave

Division

channels

and

the

associated

internal

wavelengths

that

are

supported.

The

chassis

dimensions

and

power

supplies

remain

identical.

The

WDM16

supports

all

of

the

16

standard

CWDM

wavelengths

of

1310

‐

1610

nm,

whereas

the

WDM8

units

support

only

8

of

those

channels,

so

the

installation

can

be

scaled

to

the

appropriate

size.

The

WDM8A

supports

the

upper

8

wavelengths

1470

‐

1610

nm

and

the

WDM8B

supports

the

lower

8

wavelengths

1310

‐

1450

nm.

Because

of

the

enormously

flexible

active

nature

of

the

WDM16/8,

the

wavelengths

of

the

internal

channels

are

basically

invisible

and

even

irrelevant

to

the

end

user.

The

reasons

there

are

two

subsets

of

wavelengths

supported

through

the

WDM8A

and

WDM8B

is

for

future

expandability

of

the

line

in

providing

the

possibility

of

add/drop,

combining

and

splitting

capability.

When

only

8

channel

point

to

point

functionality

is

desired,

the

WDM8A

should

be

the

model

of

choice.

Model

Channels

Internal

Wavelengths

WDM16

16

1310

‐

1610

nm

WDM8A

8

1470

‐

1610

nm

WDM8B

8

1310

‐

1450

nm