NEC nd-20292 manual Mmc-E

ND-20292

CHAPTER 5

APRIL, 1990

CO Signaling Problem

Check lines with test set to see if

I.DTMFeRotar

					Check	lineswith
Check	Memory		Block	48-l to	a test	set	to see	if
ensure	line(s)	are	programmed		they	are	DTMF	or
	for	rotary	(DP)			Rotary
					,			I

1Rotary

Monitor line with a test set and verify if system is

sending digitscorrectly

y I,

a test set to see if

,	YeseN	/	,
			c

1.If lines are DTMF increase the DTMF

duration in Memory Blocks 48 - 1 & 6

2.If lines are Rotary choose the 10 pps option in Memory Blocks 48 - 1 & 6

3.Check off-hook CO line current

1.	Reset	COLE and test. &t;cble			persists,
2.	Replace	COLE	and	testH:f;rouble	persists,
3.	Reset	MMC-E	and	tes;;:fiouble	persists,

4.Reolace MMC-E and test. If trouble persists,

THEN

5. Resest TSW-E and tes;;piouble persists,

6. Replace TSW-E and te;st.;fNtrouble persists,

7. Perform 2nd initialization and test. If trouble persists,

THEN

8.Perform 1st initialization and test. If trouble persists,

THEN

9. ReplaceCPU-E( ).

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