NEC 616 manual List of Equipment

c)Signal level

-Minimum level per frequency:

Low group: High group:

d)Duration of two frequency signal:

e)Interdigital time:

3.Dialing Memories

a)Last COjPBX Number Redial:

b)Speed Dialing-Station:

c)Speed Dialing-System:

.-,_ ,.

-1OdBm

-8dBm

60 msec. min.

00 msec. min.

16 digits max. (including pause)

16 numbers (16 digits, including any pauses)

4q numbers (16 digits, including any pauses)

150List of Equipment

150.1General Information

1.The Key Service Unit (ES-6-1 KSU) comes equipped

with two common control cards {CPU-S KTU, CLK-S KTU), a power supply (PS-6-1 PSU), and an

Installation Service Manual (ND- 173 14). A wall mounting bracket is also supplied for wall mounting the KSU. All other equipment must be ordered accord- ing to application requirements. All customer-provided optional equipment (external amplifier, MOH music source, speakers, etc.) must be locally provided.

150.2 Equipment Description

1. ES-6-1	KSU	(Key	Service	Unit)	is the Key	Service
Unit. This steel cabinet houses two common cards,
Power	Supply	and	various	Key	Telephone	Units
(KTUs). It provides service for up to 6 CO/PBX lines,
16 Keysets, 2 Door Phones, 2 BLFs and various system
options.

140.11 External Equipment Interfacing

1.External Paging

	-	Output	power:	1 watt
?	-	Required	speaker	600 ohms

inpedance:

2.Output to External Amplifier for External Paging

-	Output	power:	-1.5	dBm
-	Output	impedance:	600	ohms

3.BGM Input to PBS-S

-	Input level:		1 watt (nominal)
-	Required	output	600 ohms
	impedance	of
	amplifier:

4.MOH Input

Input	level		lm watt (nominal)/8
			ohms
Required		output	8 ohms
impedance		of signal
source	:

2. PS-6-1	PSU	is the		Power	Supply	required		for	the
ES-6-l	KSU.	The	PS-6- 1 is provided			mounted		in	the
ES-6-l	KSU	and	supplies		the required		voltages		to
KTUs installed within, and station equipment con-
nected to the ES-6-1 KSU.
3. CPU-S KTU (Central Processing Key Telephone Unit)
is composed of three sections: the Central Processor,
The ROM section for storing the generic programmed
instructions, and the RAM section for storing system
configuration		and day to day data. The CPU-S KTU
conains	an 8085A		8	bit	microprocessor		which ex-
ecutes many different functions under the control
sequence of programmed instructions stored in ROM.
The CPU-S KTU is provided installed in the ES-6-l
KSU.
4. CLK- I KTU (Clock Generator Key Telephone Unit) is
composed of 5 sections: The I/O section distributes the
data signals sent to or from the CPU. It provides an

amplifier for internal paging, clocking for rotary dial pulse signalling and a control circuit for external

CO/PBX signal!ing. The Tone source section of the . CLK generates the signal for COjPBX ringing in the system.

5.DCI-S KTU (Dial Pulse Converter Interface Key Telephone Unit) provides circuits to serve up to 3 CO/PBX lines and contains circuitry for CO/PBX ring detection, hold and control functions. It also sends rotary dial pulse signalling to CO/PBX lines in accord- ance with dialing from keysets. A DCI-S KTU and a MFI -S KTU can be mixed in a system.

Page 100-5