NEC 616 manual Co/Pbx

2.Network

-Matrix:

. Keyset network:

- Transmitter and Receiver :

3.Transmission

Single stage, non block- ing C-MOS switch ar- ray

Electronic circuit using custom LSI (Equivalent to 500 type standard network)

Dynamic type (Equivalent to 500 type standard telephone transmitter and receiver)

2)Intercom call

-Calling signal for called station:

*Ringback tone:

-Busy tone:

-Call waiting tone:

- Override tone:

- Error tone:

Voice signaIling after tone burst (580Hz,

0.75sec.) 580Hz,O.75 sec.

580Hz,

0.5sec. ON/OS sec.

OFF

1200Hz,

0.5sec. ON/O.5 sec.

OFF

58OHz, 0.75 sec.

1200Hz,

0.25	sec. ON/O.25 sec.
OFF

-Cross talk attenuation:

-Insertion loss,

station to trunk:

140.9Visual and Audible

More than 75 dB for 300-3, SOOkHz

Less than 1.8 dB at

IkHZ

Indications

* Store speed dial tone:

140.10Dialing Spxification

1. Dial	Pulse	Address Signalling
a)	Pulse	rate:

580Hz

10 pps or 20 ppS

1.Visual

Lamp indications of a Keyset are as follows:
*	Idle	condition:		Not lit
-	Busy	CO/PBX and		Steady	light
	intercom		path:
-	Incoming		CO/PBX and	Flashing	light	at 601PM
	intercom		call:
* Call hold			CO/PBX:	Winking	light	at
				‘120IPM
- I-Hold indication				Intermittent		wink light
	(CO/PBX):
*	Hold	reminder:		Flashing	light	at
				6OOIPM

2.Audible Indication

I)CO/PBX call

-	Incoming	call	on	483Hz/64SHz			modu-
	CO/PBX	(idle):		lated	by	lOHz,	1	sec.
				ON/1 sec. OFF
*	Incoming	call	on	1200Hz/580Hz
	CO/PBX	(Receiver		off
	hook):
*	Hold reminder:			1200Hz,
				0.5	sec.	ON/O.5		sec.
				OFF

b)	Percent break:
c)	Interdigital	interval:
2. DTMF Address		Signalling
a>Frequencies:

69J

Nominal770 Low Group Frequencies (Hz) 852

w*

Frequency deviation:

61 t 3 percent

800 msec.

Two sinusoidal signals, one from a high group of three frequencies

and one from a low group of four frequen-

cies.7

Nominal High Group

Frequencies (Hz)

1209	1336	1477
---
1	2	3
4	5	6
7	8	9
	0	#
Within	* 1.5%

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