NEC nd-20292 manual Electra Mark11 capacities are as follows System Ports, 110, Buffers, Tie Lines

ND-20292

CHAPTER 2

APRIL, 1990

220.7 ELECTRICAL NOISE GENERATORS Equipment such as welding machines, thyristor-driven power supplies, electric motors, etc., generate electrical noise. As a stored program unit, the Electra Mark11 System is vulnerable to this noise. When this type of machinery is present at an installation, the following precautionary steps are urged:

1.Locate the CCUs terminal equipment and cabling away from these machines.

2.If cables must pass near these machines, use shielded cable with the shield grounded.

3.Ensure all machines of this type are well

grounded to a separate ground to minimize noise interference.

220.8 ADDITIONAL EQUIPMENT

In addition to electronic station equipment (CCUs and their components) other equipment is required. These are cables, modular connecting jacks, quick-connect blocks, etc. This additional equipment must be locally supplied.

220.9 SYSTEM CAPACITY

1.Electra Mark11 capacities are as follows:

	System	ports:	128 ports	max.
;:	Outside	lines:	40 lines	max.

C.Intercom paths

	(Multiline Terminals):	Non blocking
d.	Terminals:	80 sets max.

e.DSS/BLF Consoles: 6 units max; of which a max. of 4 units can be CO Add-On Modules.

f.System Speed Dial: 80 buffers (16 digits each).

Is	Station	Speed Dial:		20	buffers	each	station
				(16	digits	each)	(110
				buffers		for	each
				ETE-16K-1).
h.	Conference		circuits:			4 max.
i.	Modem	Pool:			4 modems		max.
j.	E & M Tie		Lines:			40 lines	max.

NOTE: These figures represent the maximum of individual type devices. Since the system capacity is defined by the 128 ports, some

devices may not be installed up to the maximum numbers, depending upon the system configuration.

Multiline		Terminal,
DSSlBLFs,		RN&E
		DID,Tie	LineSo-	.
				I-
				J+i
CO Add-On		Modules,	1	.
Multiline	Terminals			e
SLTs,		Modems	1

COlPBX Lines, Modems 0

Night Chime De

External	Tone	Ring
BGM Sources	or	Dela
Announcer	Unit		-‘I	I
Voice Mail/Dictation			1-k
EquipmeWSLT,			Auto	I
Attendant,		Modems

	]	N% H			‘NE\%E
	;....	E&,Si..........-j		,
I_					‘NFktsCE;
	..............			I . .	. . . .	. . . . . . . . . a
l-
				,-----m-q
			&		PSE-/g&DO-l ;
				1 ---	e-w-	J
				L.-.-.-,-.-
			#		PSEAYDD-1 i
				b._	.-.-.	_.d
			+pq
				,.*.*...........*
			+;		PSE-fStDD-1 i
				I		. . . . . . . ..I
NOTE 1:	:;I;:	installed	in basic CCU
	l-.-.-l
	L.-.A	Installed	in first	expansion CCU
	IRI......*..	Installed	in second expansion			CCU
	.........	Installed	in third	expansion		CCU
	ti	Installed	in any	CCU
NOTE 2:	interface cards are as follows:
	ESI. SLI, COI, MFR. CNF, ECR.VMI, TLI

.

‘.

.-,

Figure 200-4 System Block 1Diagram

200-6