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.-,_ ,.
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)
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
Required output
impedance of signal
source
:
lm watt (nominal)/8
ohms
8 ohms
150
List of Equipment
150.1 General 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.
2.
3.
4.
5.
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.
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.
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.
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.
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