NEC nd-20292 manual Mfr-Ea

ND-20292

CHAPTER 5

APRIL, 1990

c3

No Outside Dial Tone Access

Check Multiline

Terminals for

intercom dial tone.

Multiline Terrr

Che

alar tone

I

1.

Reset

Multiline

Ye

Terminal

&Test.

2.

Replace

Multiline

I

Terminal.

OR

1.

Reset

&Test

MFR-EA.

3.

Reset

ESI-E()

&

No

2.

Does

Trouble

Persist?

Test.

THEN

4.

Replace

ESI-E(

)

3.

Replace

MFR-EA

and Test.

4.

Does

Trouble

Persist?

&Test.

THEN

5. Reset and Test SLI-E( )

6.

Replace

and

Test

SLI-E( )

Go to Flowchart

Go

to Flowchart

Al

Leave 1 SLI( ), 1 ESI()

and

1 MFR

installed

1.

Check

Memory

Block

1 D-5

for station.

restriction.

2.

Check

Memory

Blocks

ZC-1.25.3

for

CO assignment

I

				Yes	No
If lines are	ground	start	check	conduit	Have	Telco
and frame	ground	tosystem
		V			check	lines

1.Reset and test, Replace COI-E( ) and test. If trouble persists,

THEN

2.Reset and test, Replace MMC-E and test. If trouble persists,

THEN

3.Reset and test, Replace TSW-E( ) and test. If trouble persists,

THEN

4.	Perform	second	initialization.	If trouble		persists,
				THEN
5.	Perform	1st initialization.		If trouble	persist,
6.	Replace	CPU-E(	), and test	during	default	program.

500 -12