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6. MFI-S KTU (Dual-Tone Multip Frequency 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
DTMF dial signalling to CO/PBX lines in accordance
with dialing from keysets. A MFI-S KTY and a DCI-S
KTU can be mixed in a system.
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KSI-S KTU (Keyset Interface Key Telephone Unit)
provides data control to the Electronic Key Telephone
set (ET-6-l). Each KSI-S KTU provides circuits to
serve up to 8 Electronic Key Telephone Sets.
SWM-S KTU (Switch Matrix Key Telephone Unit)
contains a 8 x 12 semi-conductor switching matrix for
connection of keysets to CO/PBX lines, intercom paths,
door phones, and paging trunks. Each SWM-S con-
nects 8 keysets to 3 CO/PBX fines, 2 door phones, 2
intercom paths and internal and external paging
trunks. Each SWM-S provides a talk battery supply for
up to 8 ET-6- 1 Telephones.
ET-6- 1 Telephone is a fully-modular push button dial
electronic key telephone set with 35 nonlocking
buttons, a 2 digit LED display and a speaker and micro-
phone for voice page and handsfree answerback on
ICM calls. 6 of the buttons are CO/PBX line buttons,
13 buttons are function buttons, and 16 buttons are
used both for DSS (Direct Station Selection) and
Station Speed Dialing. Each keyset requires 2 pair cabl-
ing to the Main Distribution Frame (MDF).
AHR-S KTU (Automatic Hold Release Key Telephone
Unit) serves up to 6 CO/PBX lines. This option provides
for restoration of a held line to idle status when the
outside party abandons the call. A timed disconnect
signal must be sent from the central office or PBX to
activate this feature. One AHR-S KTU can be installed
in the ES-6-
1
KSU for this feature.
Page 100-6
PBS-S KTU (External Paging/Busy Lamp Field/
Security Key Telephone Unit) provides circuitry for
three optional features. It contains a l-watt amplifier
and a control circuit for single-zone external paging.
For applications where a l-watt amplifier is insuffi-
cient, a locally provided high power amplifier may be
used in addition to the PBS-S KTU. The Busy Lamp
Field circuitry to detect a signal from an external
source which activates an audible alarm in idle key-
sets and a visual alarm in the display of all keysets.
Two security circuits are provided for this purpose.
When any combination of these features is
required in
the system, one PBS-S KTU must be installed in the
ES-6-l KSU.
r-- ---
-----
j
Note:
7Yhis security feature should not he used a$ a
prirrwry
I
i-
12.
13.
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sOurce of protection.
A power otrtoge or component
failure, for example. will not result
in ,gn alarm indi_
cation.
-- --..-.-_-_.
DPH-S KTU (Door Phone Key Telephone Unit)
contains amplifiers and voice switching circuits to
provide a 2-way communication to keysets in the sys-
tern. It can also be used as a monitor phone in areas
where monitoring of audible activity is desired. This
KTU can serve up to 2 door/monitor phones and can
provide a tone to signal assigned keysets programmed
to ring when the door phone is activated.
DP-6-l Door Phone is a speaker unit with a speaker,
microphone, and a control button to provide two-way
communication to any keyset in the system. With the
DPH-S KTU installed in the KSU up to two door
phones can be connected at the Main Distribution
Frame (MDF). One pair cabling is required for each
door phone.
DB -6 -
1
BLF is a modular Electronic Busy Lamp Field
withe 21 LEDS. 16 LEDS show station status, 1 LED
each shows paging status (both internal and external),
Night Transfer, and BLF Power On status. 2 LEDs
show the status of the door phones. The EB-6- 1
comes equipped with a local power supply with a 117V
AC plug and requires 1 pair cabling to the Main Distri-
bution Frame (MDF).
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