Toshiba Strata XII User Guide

TOSHIBA SYSTEM PRACTICES

, EL,ECTRONIC KEY TELEPHONE SYSTEM

I

GENERAL DESCRIPTION

SECTION 100-020-100

JUNE 1983

Strata

XII&XX

GENERAL DESCRIPTION

SECTION

100-020-100

JUNE 1983

PARAGRAPH

01

.oo

02

02.00

02.10

02.20 03

04

05 06

06.00

06.10

06.20

06.30

06.40 07

07.00

07.10

07.20

01 GENERAL

01.00

01.01

electronic key telephone systems with many standard features; utilizing stored program control, custom LSI circuitry, solid-state space division switching and reduced station cabling. Both STRATA systems are very similar and use the same printed circuit boards for station lines, CO

lines and control. The difference is in the capacity of the two key service units (MKSUs). STRATA XII has a maximum of 12 CO lines and 32 stations;

while STRATA XX will accommodate up to 21

CO lines with a maximum of 56 stations. Both KSUs are housed in single cabinets.

01.02 designed electronic key telephone (EKT), incorporating, among other standard features, handsfree answering and full speakerphone capability. Each

EKT is connected to the system via industrystandard 2-pair cabling, and is equipped with a push-button dial pad. Solid-state electronics within the MKSU translate signals from the station dial

pad into either DTMF or rotary dial signals, as

required by the central office.

Summary Description

The STRATA XII and STRATA XX are

The STRATA systems include a specially

Both cabinets are configured- at the factory for table-top mounting but can be wall-mounted with an optional wall mount ,bracket.

02.02 The STRATA XII MKSU (Figure 3) contains two shelves with spaces to accommodate up to 18 printed circuit boards (PCBs).

02.03 The STRATA XX M’KSU (Figure 4) contains three shelves with spaces to accommodate up to 32 PCBs. .-

NOTE:

Several STRATA PCBs utilize plug-in subassemblies which are mounted directly on the host PCB. These subassemblies may or may not be required for a particular system see System Configuration for complete de tails.

02.04 180 mm) and is equipped with either an 80- or

a loo-pin edge connector. All external MKSU connections are made on the front panels of the various PCBs by using cables with industry-stan-

dard connectors.

02.10

Each PCB measures 8.7 x 7.1 ins. (220 x

Electronic Key Telephones

01.03 ible with the public telephone network and are also designed to function in a “behind PBX” environment.

01.04 quickly locating and replacing defective plug-in

units, keeping service disruption to a minimum.

Both systems are electrically compat-

Maintenance procedures are based on

02 PHYSICAL DESCRIPTIONS

02.00

02.01

of a single metal cabinet (Figures 1 and 2) with the following dimensions:

Key Service Units

Each of the STRATA MKSUs consist

STRATA XII

Height:

Width:

Depth:

STRATA XX

Height:

Width:

Depth:

19.0 inches (483 mm)

15.5 inches (394 mm)

12.0 inches (305 mm)

26.3 inches (668 mm)

16.8 inches (427 mm)

12.0 inches (305 mm)

02.1 I phones (EKTs) and a Direct Station Selection

(DSS) console may be used in either STRATA

system. All three EKTs are equipped with four

permanently dedicated keys and either 10 or 20 feature keys. Because of the number of these feature keys these EKTs are known as a 20-key

EKT, a 1 O-key EKT and a 1 O-key Busy Lamp Field (BLF) EKT.

02.12

and is equipped with 24 line and feature keys in addition to its push-button dial pad. In initialized mode, seventeen of the keys are utilized for central office/PBX lines, one for intercom access, and the

remaining six keys are used for feature operation.

System software assignments permit some assign-

ment variations to the CO/PBX keys to facilitate

tenant service and private lines, and to allow un-

used keys to be used for automatic dialing.

Three different Electronic Key Tele-

The 20-key EKT, Figure 5, measures:

Height:

Width:

Depth:

4.0 inches (102 mm)

8.8 inches (224 mm)

9.1 inches (230 mm)

-l-

.-

:

GENERAL DESCRIPTION SECTION 100-020-100

JUNE 1983

FIGURE 1 -STRATA XII MKSU (Dimensions)

19.0

483

in

mm)

-2-

. .

:

--- --- -- -- - -

SECTION

------- -----

100-020-100

JUNE 1983

i8

3 in

mm)

FIGURE S-STRATA XX MKSU (Dimensions)

-3-

._

GENERAL DESCRIPTION SECTION 100;020-100 JUNE 1983

4

PI

0

MOO”

-MF

01 02 03

4b”

MC*”

MCS”

DSS2

STR!-J

MOP”

*1

(I

. . .

;,,

I

1

El

SLF2

-

L

MlN”

I

ouou OSGM

@@@

TEL

I

.-

MOP”

0

P

u.

is.

El

I

0

i

r2

-

#4MST”

L

YIN”

TEL

L

*2

MOPL

0

FIGURE 3-STRATA XII MKSU (Interior)

-4-

GENERAL DESCRIPTION

SECTION 100-020-100

JUNE 1983

0

.,

MOP”

MOW

El

TEL

3

c.

.ec.

7

P

9

0

PA

MCOU

-MF

01 02 03

zl

“3

&”

MCOU

-MF

01 01

02

0’

71

YCOL

yj,“p

02

0’

&U

ucou

-YF

01

0’

El

f&J

ucou

-MF

01

02

0'

El

MOSU

MSMU

,O

0

STR

f-J

101 lol

MOOO

MII

g

Ii2

MlNU

0

-

MST”2

Q

$

d

Q

-

.

MWU2

~

I

FIGURE 4-STRATA XX MKSU

MSTU2

0

(Interior)

GENERAL DESCRIPTION SECTION 100-020-100 JUNE 1983

Speaker Vc

Ring Tone

Voice Leve

Handset-

Ime

-

Intercom

Feature & Function LEDs

Speaker Volume

Dial Tone &

Level

Message Waiting

H& Flash Key

Do Not Disturb

#Key . .

Voice

i . .

Speaker-

/

Modular

Cord

iker On/Off

SP

LgD

Mute-Key

Speaker On/Off Key

I

FIGURE

Dial Pad

Conference Key

5-20-key EKT

Flexible

Assignment Keys

l

COIPBX

l

Automatic Oiating

l

Repertory Dialing

l

Redial

_

1

CO/PBX

Access Kevs

-I

I ntercom

-Access Key

n

icrophone

02.13

key EKT (Figure 6), having the same dimensions as the 20-key EKT, to be alternately assigned to any station (with the e%ep&en This lo-key EKT has full access to seven CO/PBX lines and can receive transferred calls

lines.

02.14 An optional lo-key BLF EKT may be assigned via software at up to 15 positions (stations 10 through 25, e-t #%?, only). This EKT has

the same dimensions and key features as the

1 O-key.

02.15 cords and are connected to the system via fourconductor modular line cords.

Software assignment permits the lo-

of s&3&n+?).

on

the other

All EKTs feature modular handset

02.20

02.21

(DSS) console (Figure 7) is available for both systems where the volume of incoming calls warrants a dedicated call forwarding location. The dimensions of the DSS are the same as the EKT. The DSS is equipped with up to 56 station keys, an intercom key, an All Call page key, Message Waiting/Flash key and a Night Transfer key.

Both systems may be equipped with one or two (which may operate simultaneously) consoles.

02.22 A 20-key EKT, which varies from the standard EKT only in different dedicated functions and lacking an intercom key (it is on the DSS), must accompany the DSS.

-6-

Direct Station Selection Console

An optional Direct Station Selection

key

Handset

Speaker Volume.

Ring Tone & Intercom Voice Level

LitNtHAL UtSCRlPTlON

Feature & Function LEDs

/

Message Waiting

/ & Flash Key

SECTION 100-020-100

JUNE 1983

Speaker

Modular Cord

M;te Key

FIGURE

Dial Pad

Conference Key

6-lo-key

EKT

_ Do Not Disturb

Key

1

COIPBX Access Keys

I

J

Intercom Access Key

icrophone

4

FIGURE 7 -DIRECT STATION SELECTION (DSS) CONSOLE

-7-

.-

:

GENERAL DESCRIPTION SECTION lot?-020400 JUNE 1983

One

02.23

be optionally added to either system as BLF consoles. Their only function is to provide station status information.

or two additional DSS consoles may

03 ELECTRICAL CHARACTERISTICS

03.01 system are summarized in Table A.

The electrical characteristics of the

,

SUMMARY OF

Station Loop Limits

EKT

OPX

DSS

Ringing Tone

CO Line (idle station)

Intercom Line

Busy Override Tone

Dial Tone

Ring-back Tone

Busy Tone

Do Not Disturb Tone

Voice Page Warning Tone

(DTMF) (DP)

(busy station)

(Intercom)

TABLE

A

ELECTRICAL CHARACTERISTICS -

1000 ft. (305 M), 24 AWG

1200 ohms, 48 VDC 1700 ohms, 48 VDC 500 ft. (152.5 M), 24 AWG

600/800 Hz, modulated by 16 Hz, 1 set on-3 set off 2400 Hz, modulated by 10 Hz, 1 set on-3 sec. off 600 Hz, 1 set on - 3 set off

2400 Hz, 1 set on-3 set off

600 Hz, continuous

600 Hz, 1 set on-3 set off

600 Hz, 0.25 set on - 0.25 set off

600 Hz, 0.12 set on - 0.12 set off

600 Hz, 1 set on only (via EKT speaker)

. .

Exec. Override Warning Tone

Dialing

Primary Power

Hold Recall Tone

Environmental Specifications

Operating Temperature Operating Humidity

03.02 24 VDC power supply.

03.03 failure of the system. System memory, however, is orotected from loss due to power failure by

internal battery power. Full system reserve Power is available as an option.

NOTE:

The batteries used are designed to maintain

The MKSU operates from an external

Loss of AC power will cause operational

600 Hz, 0.5 set on only (via handset)

Push-button; system generated DTMF or dial pulse

90 ‘L 130 VAC, 60 Hz

2400 Hz, modulated by 10 Hz, 1 set on - 1 set off

32 ‘L 122-F (0% 5O’C) 20 Q 80% relative humidity (without condensation)

full memory protection for up to five years with no external power source applied.

04 FEATURES and SERVICES

04.01 electronic key telephone systems are summarized in Tables B and C, which list the standard and

optional features respectively.

The features and services of the STRATA

/

-8-

_ 0

STANDARD FEATURES

l

All Call Voice Page

0

Automatic Callback

0

Automatic Dialing-System -. Automatic Hold Recall

0

Automatic Privacy

l

Automatic Release from Hold

0

Background Music with Station Control

0

Busy Override

0

Conference-Multi-station

l

Conference-Multi-trunk

0

Directed Call Pick-up r’

0

Distinctive Ringing

0

DTMF and Dial Pulse Compatible

0

External Page Interface

8

Flash Key-PBX Transfer or CO Dial Tone

Recall

0

Flexible Line Ringing Assignment

(Interc0m)i.l. I-Z

TABLE B

SYSTEM

.:

GENERAL

DESCRIPTION

SECTION 100-020-100

JUNE 1983

0

Group Paging --

Live System Programming

_*

Message Waiting Multiple Simultaneous Handsfree Intercom

Paths Music-on-hold Interface d Night Ringing Over External Page Night Transfer Non-blocking Dialing Outgoing Call Restriction PBX Compatible Private CO Lines

Repeat Last Number Dialed Tenant Service ._: Toll Restriction Voice or Tone Signalling

0

Do Not Disturb

0

Do Not Disturb Override

0

Executive Override of Privacy

l

Handsfree Answerback

l-called Illumination

0

l-hold Illumination l-use Illumination

0

l

Automatic Dialing-Station

0 Direct Station Selection Console:

l

All Call Voice Page

l

Automatic Line Hold

l

Expanded Line Appearance

l

Multiple DSS Consoles

l

Night Transfer

l

Voice or Tone Signalling xG ,;,./ ,L _I ._ ;’ G

l

Off Premise Extension (OPX) _= :., ,I

l

Off Premise Line(OPL) . . .

_ ‘_ .___r

_..

STATION

0

Modular Handset and Line Cords Mute Key

a

0

On-hook Dialing

l

Push-button Dialing

0

Ringing Line Preference

Speakerphone

l

TABLE C

OPTIONAL FEATURES

0

Relay Service

0

Station Message Detail Recording Zt r-_z_. r >’

0

System Battery Back-up

0

1

0

lo-key BLF EKT

0

-. ._

; 0 _,

Wall Mounting Kit for EKT Wall Mounting Kit for MKSU

l

External Page

l

Night Relay Service

(SMDR)

O-key EKT

Li<<t

: :< ..L

T _

-

05 SYSTEM OPERATION

distribution frame (MDF). Using modular line

05.01 The system (Figure 8) consists of an MKSU, power supply and up to 32 (STRATA Xl I) or 56 (STRATA XX) electronic key telephones

: EKTs). All connections

‘,

EKTs are made via a

between the MKSU and

customer-provided main

cords, the CO lines are then connected between the MCOU PCBs and the telephone companyprovided RJ-25C jacks. An external tuner (or equivalent) is required if the music-on-hold feature is utilized.

.>

-9-

GENERAL DESCRIPTION SECTION 100-020-100 JUNE 1983

To CO

MKSU (STRATA Xl,“& XX)

-

t

-1 Tunei ]

25Pair

Cable

External Speaker

/

MDF

r

P-Pair

FIGURE -8 -SYSTEM DIAGRAM

-IO-

._

DSS

J

:

ULlYCnn~

ucau-ut-

SECTION 100-020-100

JUNE

I IUI~

1983

t f

-

05.02 Functional block diagrams of the systems are shown in Figures 9 (STRATA XII) and 10

(STRATA XX). The systems, which are nearly identical, consist of: station interfaces (MSTU), which include a portion of the solid-state switch-

ing matrix; the MXPU PCBs, containing the remainder of the switching matrix; the CO line

interfaces (MCOU); the intercom circuits (MINU);

DSS interface (MDSU); power, paging and MOH interface (MPRU); the central control consisting of the MCAU/AMMU (the AMMU PCB mounts directly on the MCAU and is required in all systems) and MCBU (STRATA XX uses two MCBUs, STRATA XII, only one); off-premise extension

(OPX) interface (MOPU); and the SMDR interface

(MSMU):

05.03

The systems are entirely under the control of a single chip microprocessor, located, along with the system program and data memories, on the MCAU/AMMU PCBs. The MCBU PCB houses the microprocessor used to transmit and receive data to and from the other PCBs.

06.00

06.01

06 SYSTEM

Key Service Units

The MKSU arrangements illustrated in

CONFIGURATION

Figures 3 (STRATA XII) and 4 (STRATA XX) show the locations of the various PCBs. All PCBs slide in from the front of the cabinet, and, although the rear panel of the MKSU is removable,

rear access is usually not required.

06.02

Complete with all available options,

the STRATA systems utilize 12 different printed

circuit boards. The functions of these PCBs are:

MCOU(MForDP):(

. !-_-. .=:I= : 2)

An interface between the MKSU and the public telephone network or PBX lines. Ring detection,

hold and dial outpulsing are performed by this PCB. Depending upon local CO requirements,

an MF or DP type of MCOU will be provided

(MF for DTMF outpulsing, DP for rotary dial outpulsing). Each MCOUPCB serves up to

three CO/PBX lines.

MSTU:

-

i:. rr-

‘;T ) _. ;_ , z, ,__: __

--

An interface‘ b&we%“th-e “-MKSU and EKTs, which includes a portion of the system’s solidstate space division matrix. Each MSTU PCB services up to eight EKTs. Two-pair wiring is required for each EKT; one pair carrying voice

and the other pair carrying

data

to and from

the EKT.

MXPU:

Contains the solid-state crosspoints which make up the remainder of the space division switch-

ing matrix. Each PCB services up to 16 stations

and provides access to 12 CO lines plus four

intercom paths, or nine CO lines and two intercom paths, depending upon its position in the system.

MCAU/AMMU

:

l

.

The AMMU is required and mounts directly on the MCAU to form a single unit. All system. control functions are performed by the single chip microprocessor located on the MCAU. The system program stored in ROM, the RAM for system operations and the battery-protected

RAM for system data storage are located on the AMMU.

MCBU

:

Contains a microprocessor and serves to off-

load the main CPU by handling the routine and

repetitive data transmission tasks to and from the peripheral equipment. One MCBU is used in STRATA XII, while two are required in any STRATA XX system that is equipped with more than 32 stations.

CRDU:

This optional PCB provides the additional

memory capacity required for the Automatic

Dialing-Station feature. The RAM containing the additional memory capacity is batteryprotected. The CRDU mounts directly on the MCBU and/or MDSU. A maximum of two CRDUsareused inSTRATAXII,whileSTRATA XX may use as many as three.

MDSU:

An optional PCB that serves as an interface

between the DSS console(s) and the MKSU (only one MDSU is used in each system). The MDSU serves up to two fully functional DSS

consoles and two DSS consoles that are used

as Busy Lamp Field terminals only.

Ml NU

: L_, ,. - ,:..> ._; -., I.

-: -..

1;

Generates system tones and provides the switch-

ing matrix for the delivery of tones for both

paging and intercom connections (one per

system).

I

i: I _,!

.:

_y-

.\_. - - I

-ll-

GENERAL DESCRIPTION SECTION 100-020-100 JUNE 1983

EKT

DSS CONSOLE

1

MSTU

I

1

MINU

’ MDSU

MXPU

I

DATA

I

DATA

_-_

I I

____

I I

I

1

I

:

1

MCOU

L

MCOU ;

COIPBX LINES

I 1

I I

I

’

I

1 I

I

MPRU

11 ;

MCBU 4

1 Data MCAU

Tl

+ 24V

/

+ 12v

4

+5v

_

FIGURE g-STRATA XII FUNCTIONAL BLOCK DIAGRAM

-12-

POW

__

i EXTERNAL

SPEAKER

I

RADIO

-----I POWER

SUPPLY I

AC 115V

’

:

GENERAL DESCRIPTION

SPEAKER

SECTION 100-020-100

JUNE 1983

5

MSMU _

I

l-l,_

e;ni

DSS CONSOLE

XP

MXPU

IL.

I

XP -

I

.

c

MCOU

I-

I

>c

MPRU

COlPBX

1

LINES

EXTERNAL

MSTU

il

?

?5

) MINU, DATA 1 / ,

-1

MCBU( A

I_

MCBU 4 4 Data Mc*U 1

- -

1;7 zv ! 1-1 1 1 RADIO

FIGURE lo-STRATA XX FUNCTIONAL BLOCK DIAGRAM

-13-

-1

AC 115v

. .

GENERAL DESCRIPTION SECTION 100-020-100 JUNE 1983

-_ s

r ‘!

il

, _.*.-;.- /

_:

MPRU - one per system:

Performs several system functions:

l

Provides connection points for the 24 VDC input power.

l

Houses the voltage regulators that provide 12 VDC and 5 VDC for system operation.

l

Houses circuitry and connection points

for the relay services and music-on-hold

(MOH).

l

Houses the external page amplifier.

MOFVJ (DP or MF/DP): {L_- I ,,.“I

An optional PCB that serves as an interface between the MKSU and conventional, single line telephones or off-premise extension (OPX) lines. Each MOPU PCB services two extensions. A maximum of two MOPUs can be installed

‘2.

_ in STRATA XII and three in STRATA XX.

An MOPU DP will operate with rotary dialtype telephones only. Either DTMF or rotary dial telephones can be used with an MOPU

MF/DP PCB.

MSMU/SCNU :

-IThe SCNU is required and mounts directly on

;:

;:i ‘,.

, _ .-

the MSMU to form a single unit. This optional

-PCB serves as an interface between the MKSU

_ and a printer or storage device used for the

SMDR feature. The PCB is equipped with an

RS 232C-type interface (one per ;syFem).

:)“iC i ,.

I -

MPLU/POPU (MF or DP):

The POPU is required and mounts directly on

the MPLU to form a single unit. This optional

PCB allows the bridging of a CO/PBX line

(which appears in the STRATA system) with a conventional telephone. OP L telephones thus connected will automatically cause a busy

indication within the STRATA system and

establish system privacy when initiating or answering a call on the dedicated CO line. The

MPLU serves up to three CO/PBX line/OPL

combinations and replaces the MCOU that

would usually serve these lines. A maximum

of one MPLU may be used per system.

.< ,. .I;,- ;

- _

% inch toggle bolts or screws, The unit can accommodate “brown out” conditions or high voltages within a range of 90 ‘Q

130

VAC, 60 Hz. A lo-ft. AC power cord allows flexibility in lpcating the power supply during installation.

06.12

An optional battery back-up unit (PBBU) is available for the power supply. It is a printed circuit board that mounts inside the power supply housing and is connected to the recommended battery pack (which is customer-supplied, consisting of two 12 VDC, maintenance-free, automobile type batteries -

80 amp/hour maximum rating).

With the optional battery back-up assembly

installed, all functions of the STRATA systems will continue to operate for several hours (the actua! time period is in direct ratio to the type and size of batteries selected) after a loss of normal electrical power. No calls will be disconnected during

switch-over to battery power.

06.20 Station Equipment

06.2 1 Standard electronic key telephone (EKT)

features include full speakerphone capability,

handsfree answerback and modular handset and line

cords.

06.22 The principal components of the

STRATA 20-key EKT are: handset, dial pad,

speaker, ringing volume control, speakerphone

volume control, intercom key, 17 CO/PBX line

keys (or with up to seven Automatic Dialing keys) and six feature keys. LED indicators are provided

for all keys except the HOLD, CONF and MUTE

keys.

06.23 In addition,

software options allow

complete compatibility of the STRATA VI EKT with both of the STRATA XII & XX systems. This lo-key EKT will have direct access to seven

CO/PBX lines, but can receive transferred calls

on all other unrestricted CO/PBX lines.

06.24

The optional lo-key BLF EKT may

be assigned via software at up to 15 positions

(stations 10 through 25, except #17, only). This EKT has the same dimensions and key features as

the 1 O-key.

06.10

06.11

Power Supply Assembly

The separate power supply is a fixed unit

complete with a wall .mounting bracket.

ment to a wall or other fixed surface is

Attach-

via two

06.25 An optional Direct Station Selection (DSS) console is available for both systems where the volume of incoming calls warrants a dedicated

call forwarding location. The dimensions of th

DSS are the same as the EKT. The attendant _

-14-

GENERAL DESCRIPTION

SECTION

100-020-100

JUNE

1983

EKT varies from ferent dedicated intercom key (it quipped with up to 56 station keys, an intercom key, an All -Call page key, Message Waiting/Flash key and a Night Transfer key. Either system may be equipped with one or two fully functional DSS consoles.

06.26 ally added to either system as BLF consoles. Their only function information.

06.27 different configurations of line and feature assignments are available. Some options include 17

CO/PBX

matic Dialing keys with a corresponding reduction

in available

06.28

of key assignments, which differ only in CO/ PBX line appearance.

06.30

06.31 the factory for table-top mounting, but the use of the optional wall mount bracket and a simple reversal of the back panel quickly converts them for wall mounting.

One or two DSS consoles may be option-

Utilizing the 20-key EKT, thirteen

lines, while others offer up to seven Auto-

CO/PBX

The

Installation

The STRATA MKSUs are arranged at

the standard EKT only in dif-

key functions and lacking an

is on the DSS). The DSS is e-

is to provide station status

keys.

lo-key

EKT

offers five variations

External page output Night relay service External page relay service

l

An RS 232C-type plug is provided on the MSMU for connecting the SMDR printer;

l

OPX connections for two circuits are made to the front of the MOPU PCB by using a single 2pair modular cord. External DC and ringing power, is connected to the&lOPU via a screwterminal barrier strip.

l

OPL connections are made via 6-wire modular cords to the front of the MPLU. Two cords are required; one cord is connected to the CO jack and serves up to three CO/PBX line connections as with an MCOU (the MPLU occupies an MCOU PCB position), the second 6-wire cord connects to the OPL jack and serves the three OPL stations provided by that PCB.

06.33 The power supply is mounted to the wall separately from the MKSU and connected to the 24 VDC input on the MPRU PCB.

06.40

06.41 Faults in both STRATA systems are repaired by replacing any faulty component (PCB,

subassembly, telephone, etc.) and returning it to the manufacturer for repair.

Maintenance

06.32 via the faceplates of the various printed circuit boards.

l

All connections to the MKSUs are made

CO/PBX line connections are made to the front of each MCOU using one 3-pair modular cord for each card.

Each group of eight EKTs is connected to the front of each MSTU with one standard 50-pin amphenol-type connector.

DSS connections are made to the front of

the

MDSU PCB

for each DSS.

Screw-terminal barrier strips are mounted on the front of the MPRU to provide attach-

ment points for the following connections:

24 VDC power input Music-on-hold source input

with one 2-pair modular cord

07

07 .oo General

07.01 This section contains brief descriptions of the STRATA features listed earlier in Tables B and C and some associated operating instructions.

Detailed operating instructions can be found _in the STRATA XII and XX USER GUIDE or Section 100-020-400, operating

07.10

07.11

All Call Voice Page:

Dialing a 2-digit access code permits a station user to page via all EKT speakers simultane ously. The system can also be programmed to

include the External Page feature in an AH

Call Page.

-15-

FEATURES and OPERATION

Procedures.

Standard Features

System

GENERAL DESCRIPTION SECTION 100-020-100 JUNE 1983

Automatic Callback (Intercom)

Permits a station user who encounters a busy station on intercom to request a callback by dialing a dedicated access code. The system then monitors the called station and signals the caller when it becomes idle.

Automatic Dialing-System:

This standard feature allows 24 numbers to be stored in the system memory. After selecting an outgoing line, any station user can cause one of the stored numbers to be outpulsed

by dialing the proper access code.

Automatic Hold Recall:

A CO line placed on hold by any station will

recall that station after a programmable period of time.

Automatic Privacy:

Privacy is automatic on all connections (except OPL).

Automatic Release from Hold:

The system automatically releases held CO lines

if a disconnect signal is received from the

central office.

Background Music with Station Control:

Music from the music-on-hold source can, at

the station

speaker. The same music may also be broad-

cast via the external page interface if an external

speaker is installed.

Busy Override:

After dialing a tone, the caller can dial a burst to be sounded via the called EKT speaker.

Conference-Multi-station:

Conferencing is permitted to a maximum of

four stations and one CO or intercom line.

user’s

option, be heard via the EKT

busy station

:

and receiving a busy

q

and cause a tone

DTMF and Dial Pulse Compatible:

DTMF or rotary dial pulse signalling can be sent to the CO/PBX line by installing the proper MCOU PCB type.

External Page

Dialing a 2-digit code permits a station user access to a customer-provided external speaker via an internal 3-watt amplifier. As an option, a 2-way, 600-ohm voice path is available for

use with a customer-supplies talk-back speaker/

amplifier.

Flash Key-PBX Transfer or CO Dial Tone Recall:

All EKTs are equipped with a Message Waiting/

Flash (MW/FL) key which, when operated while-

connected to a CO/PBX line, causes a timed

“flash” to be transmitted to the CO or PBX.

The timing of the flash can be programmed to

signal a PBX for feature operation or can be

long enough to cause a disconnect and dial

tone recall on a CO line. Also see Message

Waiting.

Flexible Line Ringing Assignment:

A programmable ring or no ring option is pro-

vided for each line selectively by each station.

Each line may be programmed to ring a maximum of eight stations.

Group Paging:

Special 2-digit access codes (81, 82, 83 or

84) permit voice paging to one of four zones. Zone assignment is via software and is totally flexible. Paging is via the EKT speakers.

Live System Programming:

Live system programming is accomplished without service interruption to other station users by placing the system in the special programming mode and inputting data via station

17. Station 17 is the only station that is “down”

during programming.

Interface:

.,

Conference-Multi-trunk:

Conferencing of two CO lines and three stations

is permitted.

Directed Call Pick-up:

Intercom calls can be answered from any station by going off-hook, without siezing a line, and dialing the number of the ringing station.

Distinctive Ringing:

CO line and intercom calls are distinguished by

different ringing tones.

Message Waiting:

The designated Message Center can indicate a message is waiting for any station with the

Message Waiting LED of that station. The called station cancels the LED by lifting the handset and operating the MW/FL key. Also see Flash Key.

Multiple Simultaneous Handsfree Intercom Paths:

Four intercom paths are available in a STRATA

XII system and up to six paths in a STRATA

-16-

GENERAL DESCRIPTION

SECTION

100-020-100

JUNE

1983

XX. All intercom lines are able to carry handsfree conversations simultaneously.

Music-on-hold Interface:

An interface is included for a customer-provided music source. CO lines placed on hold will be connected to this source. In addition, this music may also be broadcast from EKT speakers and external page when the background music options are selected.

Night Ringing Over External Page:

As a programmable option, while the night

mode is active, a system-generated ring tone will be transmitted via the external speaker whenever any line rings (see Tenant Service).

Night Transfer:

On a programmable optional basis, the STRATA systems can function with two or three ringing patterns. If three patterns are selected, they are designated Day, Day 2, and Night. If only two patterns are selected, Day and Night designations are used. In both cases, the ringing modes are selected with the lNrl key on either DSS console or station 10 (see Tenant Service).

two tenants to be served from the same MKSU with each tenant’s lines appearing in the correct sequence. When Tenant Service is used, Night

Ringing Over External Page will apply to lines assigned to Tenant #l only. Also, Night Transfer of Ringing for Tenant #1 and Tenant #2

lines will be independantly controlled by DSS

#1 (station 10) and DSS #2 (station respectively.

Toll Restriction:

Selectively programmed on i per-station, perline basis, STRATA performs by rejecting the numbers “0” and “1” as the first or second digit and limiting the total number of digits dialed to seven or eight.

Voice or Tone Signalling:

A programmable system feature that optionally selects either tone ringing or voice page as the primary method of intercom call signalling. The calling station, however, may choose the alternate method by dialing /J following the station number.

07.12

Station

toll

9

restriction

1 l),

Non-blocking Dialing:

Dialing is permitted on INT and all CO lines simultaneously.

Outgoing Call Restriction:

Any station can be selectively restricted frqm originating calls on any or all CO lines. However, the station may still receive calls on the restricted line(s).

PBX Compatible:

STRATA features, automatic dialing,

operation.

Private CO Lines:

Restrictions may system so selected on selected station(s).

Repeat Last Number Dialed:

The last number dialed by each station is always

stored by the system and will be dialed automatically whenever the station user selects an outgoing line and depresses the

Tenant Service:

Variable CO/PBX line key assignments allow

such as toll restriction and

compatible with PBX

are

programmed into the

be

line(s) will appear only

co

q

key.

Do Not Disturb:

This feature is activated and deactivated by alternate depressions of the @ key. A station calling a station that is in the DND mode will receive a fast busy tone.

Do Not Disturb Override:

After reaching a DND station, that station may be advised that a call is waiting by dialing A tone signal will be heard at the DND station.

Executive Override of Privacy:

A station that is programmed for this feature will override the automatic privacy feature and

is able to enter any existing conversation within the system. A warning tone, however, is inserted before the overriding station is actually connected. A maximum of two stations can be programmed for executive override.

Handsfree Answerback:

All EKTs are equipped for handsfree answerback on voice-announced intercom calls as a standard feature.

l-called Illumination:

A distinctive flash appears on the intercom

LED

at the EKT that is actually being called.

q

.

-17-

GENERAL DESCRIPTION SECTION 100-020-100 JUNE 1983

l-hold Illumination:

The EKT user is shown a distinctive LED flash to indicate a line actually placed on hold at the EKT. All other stations see a normal on-hold-flash.

l-use Illumination:

A distinctive flash rate shows the line presently

in use at a given EKT. Other stations see a

steadly illuminated LED for that line.

Modular Handset and Line Cords:

All EKTs are equipped with modular handset and line cords.

Mute Key:

All EKTs have a II key that may be used to cut off the microphone when the speakerphone is in use, thereby permitting a private local con-

versation.

On-hook Dialing:

STRATA lets you dial your calls with the handset still on-hook. Call progress can be heard via the telephone speaker; no need to pick up the handset until your party answers.

Push-Button Dialing:

All STRATA EKTs are equipped with pushbutton dial pads.

Ringing Line Preference:

A line ringing at a station can be answered by merely lifting the handset or depressing the

(=I key. The ringing line will be automati-

cally selected.

Speakerphone:

All EKTs are fully functional speakerphones.

07.20 Optional Features

Automatic Dialing-Station:

Adding CRDUs to the MCBU and/or MDSU

increases the STRATA automatic dialing capabilities from the standard 24 numbers in Automatic DialingSystem to a maximum of 40

telephone numbers

list and 40 numbers list.

in the system directory

in each station’s directory

allow the attendant to voice-page via the EKT speakers at all the stations in the system simultaneously. If the External Page

has been included in the All Call -via system option selection, the m key will operate that as well.

Automatic Line Hold-each calling CO/PBX

b)

line is automatically placed on hold when the DSS operator activates a station key.

Expanded Line Appearance-twenty CO/

cl

PBX line keys are available on the EKT associated with the DSS console. The intercom and -1 keys for that EKT are located on the DSS console.

Multiple DSS Consoles-the STRATA XII

d)

and STRATA XX systems will each support

two

fully funtional DSS consoles (which may operate simultaneously) as well as two additional consoles functioning only as Busy Lamp Field terminals.

Night Transfer-the lNTl key on the DSS

4

console(s) or station 10 controls the system ringing patterns.

Voice or Tone Signalling-the DSS may be

f)

programmed for tone or voice signalling preference independently of the remainder of the system. As with all stations, the operator can choose the alternate mode by dialing number.

Off Premise Extension (OPX)

Installing an optional MOPU (DP or MF/DP)

PCB, along with auxiliary power and ringing supply, allows the system to interface with conventional single line telephones or off pre-

mise circuits. The MOPU serves two extensions and a maximum of two may be installed in STRATA XII and three in STRATA XX.

Off Premise Line (OPL):

Installing an optional MPLU (MF or DP) in

place of an MCOU PCB allows the bridging of a CO/PBX line (which appears in theSTRATA system) with a conventional telephone. Max-

imum: one per system.

a !-?J following the station

:

Direct Station Selection

a) All Call Voice Page -a single dedicated

on the DSS console (labeled m

(DSS) Console:

)

key

will

Relay Service:

-18-

When the optional relays are equipped on the

MPRU PCB, the following for external equipment:

signals are provided

GENERAL DESCRIPTION

‘,

SECTION 100-020-100

JUNE 1983

a) External Page--the relay is activated when-

ever the external page circuit is accessed. A “make” contact is provided for control of background music on external page.

This is- required only when an external

page amplifier is used.

b) Night Relay Service-relay will provide a

dry contact at the NR terminals on the front of the MPRU PCB. A strap option on the MPRU allows the NR relay to function

in one of two modes:

1) Answering Machine Control- if the strap remains intact, the relay is operated continuously when the system is

in night service. This mode is intended for indirect control of an answering machine.

2) Night Bell Control -if the strap is cut, the relay pulses at a 1-sec. on, 3-sec. off rate whenever the system is in night transfer mode and an incoming call is ringing the system. This mode is intended to be used for indirect control of an external night bell.

Station Message Detail Recording (SMDR):

Adding the optional MSMU PCB allows data to

be collected for each outgoing and incoming

CO line call. This data may be output to a

printer or recording device- via the RS232C

interface located on the MSMU.

System Battery Back-up:

An optional PCB can be installed in theSTRATA power supply to provide automatic switching to standby battery power. During *normal power conditions the batteries are kept fully charged by the power supply.

lo-key EKT:

The IO-key E KT may be assigned to any station

except #17. This EKT has full access to seven CO/PBX lines and can receive transferred calls on other lines.

lo-key BLF EKT:

The optional lo-key B LF EKT may be used

at up to 15 positions (stations 10 through 25, except #17, only). The BLF will display the status of stations 10 through 25.

Wall Mounting Kit for EKT:

The STRATA EKT is easily converted for wall

mounting with an optional handset hanger kit.

Wall Mounting Kit for MKSU:

The MKSU is shipped configured for table

mounting, but the use of the optional wall

mount bracket and a simple reversal of the back

panel quickly converts it for wail mounting.

5

’

-19-

TOSHIBA SYSTEM PRACTICES ELECTRONIC KEY TELEPHONE SYSTEM

INSTALLATION

SECTION 100-020-200

JUNE 1983

SGrata

XII&xx

INSTALLATION

+’ -

TOSHIBA SYSTEM PRACTICES

ELECTRONIC KEY TELEPHONE SYSTEM

INSTALLATlbN

01 GENERAL

INSTALLATION

SECTION 100-020-200

JUNE 1983

01.01

precedures necessary to ensure proper operation of the STRATA XII & XX systems. The installation procedures for the two systems vary only in relation to size; all other factors are the same.

This section describes the installation

02 PACKING

02.01 examine all packages and carefully damage. If any damage is found, bring it to the attention of the delivery carrier and make the

proper claims.

02.02

the contents of the STRATA shipment against the purchase order and packing slip. If it is determined that any cartons are missing, contact your delivery carrier immediately. If it is determined that any equipment within a carton

is missing, mediately.

02.03 the installation), inspect all equipment

If any damage is detected, contact your delivery carrier immediately. If possible, retain all the original packing material.

When a STRATA system is received,

note any

Check the number of cartons and

contact your Toshiba supplier im-

After unpacking (prior to beginning

visible

for damage.

FIGURE l-CRDU BATTERY STRAP

CAUTION:

When handling (ins taking, removing, examin-

ing, etc.) a printed circuit board, do not touch

the back (soldered) side or the edge connector. Always hold a PCB by its edge.

02.04

AMMU, or MSMU, ensure the following:

Conductive packing material may cause the internal back-up battery to discharge and damage the PCB.

02.05 Whenever storing or shipping a CRDU,

AMMU or MSMU always ensure that the battery strap is in the OFF position. See Figure 1 for

the CRDU, Figure 2 for the AMMU, Figure 3

for the MSMU.

When packing or storing a CRDU,

Do not use plastic or any type of conductive

material for packing either a CRDU, AMMU,

or

MSMU. Use plain paper.

CAUTION:

FIGURE 2-AMMU BATTERY STRAP

NOTE:

Always make sure the battery strap on

the AMMU is in the ‘ON” position just

prior to installation. If not, the SET LED on

the

MCA

U

will not operate.

equipped, ensure that the battery straps on

the CRDUls) and MSMlJ are in the “‘ON”

position.

Also, if

-l-

INSTALLATION SECTION 100-020-200

JUNE 1983

FIGURE 3-MSMU BATTERY STRAP

03 MKSU LOCATION REQUIREMENTS

03.00

03.01

requires 24 VDC. This is provided by the power supply (EPSA), which in turn requires power from a grounded 115 VAC outlet. The outlet should be separately fused and rated at 15 amps.

03.02 with both STRATA systems.

Power Requirements

The STRATA MKSU (both XII & XX)

The same EPSA power supply is used

03.10

03.11 allow dissipation of the heat generated by the

power supply and MKSU.

03.20

03.21

should be within 20~80% (without condensation), and the temperature should be rela-

tively constant within a range of 32~122’F

(0 w 5o’C). Exposure chemicals should also be taken into consideration.

03.30

03.31 all stations are within 1000 cable feet (305 m) of it. The DSS console must be located within

500 cable feet (152.5 m) of the MKSU. Accept-

able cable is 22 or 24 AWG inside telephone station cable, jacketed but not shielded, having two or more twisted wire pairs.

Ventilation Requirements

Sufficient ventilation should exist to

Environmental Factors

Humidity at the MKSU location

to dust and airborne

Cabling Considerations

The MKSU must be located so that

04 MKSU MOUNTING

04.01

or wall mounting (using the MKWM Wall Mounting Kit), but is factory-configured for table mounting. For wall mounting instructions, refer to Paragraph

04.10

The MKSU is designed for either table

04.20.

Table Mounting the M KSU

_

,

03.03 the EPSA to the MKSU dictates the relative

location of the power supply. The power supply is also equipped with a lo-ft. AC power cord.

03.04 (PBBU) is available for the power supply. It is

a printed circuit board that mounts inside the

power supply housing. The recommended battery pack, which is customer-supplied, consists of two maintenance-free automobile 12 VDC

batteries (maximum 80-amp/hr rating). With the optional PBBU assembly installed, all functions of either STRATA system will continue to operate for several hours after a loss of normal

electrical power (the actual period of time is in

direct ratio to the type and size of batteries se-

lected). No calls will be disconnected during

switch-over to battery power.

The 54-inch cord provided to connect

An optional battery back-up unit

04.11 for table mounting, the only requirement is to choose a suitable location and proceed to Section 100-020-250, Power Supply lnstalla-

Con.

04.20

IMPORTANT: If one or more MOPlJ PCBs are required in

the system, review Paragraph 07.20, MOPlJ Installation, prior to mounting the MKSLJ. An MCBL (MOPlJ receiving connector) for each MOPU to be equipped must be installed before the MKSU is mounted on the wall.

04.21 used for both MKSUs. Each kit consists of:

-2-

Since the MKSU is already configured

Wall Mounting the MKSU

The same MKWM Wall Mounting Kit is,

’

Drilling Template

1

1 Back Plate 1 Side Plate A 1 Side Plate B

Side

2

12 Binding-head Screws

04.22 before proceeding.

Be certain that all parts are included

Angles

Paper TernplatE

\

INSTALLATION

SECTION 100-020-200

Wall

B

b

JUNE

1983

04.23 in the MKWM kit, six fasteners, suitable for the

type of wall chosen, must be supplied by the

installer. The fasteners will

the wall mount bracket and A typical fastener would be:

04.24 MKSU on a surface of sufficient strength to support its weight. The MKSUs (fully equipped)

weigh

STRATA Xl I: STRATA XX:

04.25 the mounting surface with tape, and perform the following steps:

Be sure the template is at the proper height

a)

and use a spirit level to make sure it is level.

In addition to those items supplied

be used to secure

MKSU to the wall.

l/4-in. Toggle Bolt l/4-in. Molly Fastener l/4-in. Lag Screw

Choose a suitable location for the

:

52.0 lb (23.6 kg)

72.6 lb (32.9 kg)

Secure the template (Figure 4) to

A,B

%

For STRATA Xl I

.

(A)

FIGURE

Fo\r STRATA XX

4 IB) * ‘- ’

‘t

MKSU WALL MOUNTING KIT TEMPLATE

Binding-Head , ,

Screws

Side Plate

J i A._

-

B

.

Mark the locations of the six mounting holes.

b)

Use the locations marked “A” for STRATA Xl I and “B” for STRATA XX.

Remove the template, and at each point

c)

marked, drill a hole suitable for the chosen fastener.

04.26

bracket as follows:

a) Attach the two side plates (A & B) to the back

plate using four of the binding-head screws supplied with the kit (Figure 5). Note that three holes are provided on the right side of the back plate. Use the inner two holes for STRATA XII and the outer two for STRATA XX. (When arranged for STRATA XX mount-

ing, the side plate will extend beyond the

Assemble and secure the wall mount

Back Plate’

Side Plate B

w----

Fasteners

Supplied Locally

Side Angle

FIGURE 5-ASSEMBLED

MKSU WALL MOUNTING KIT

back plate.)

b) Attach front plate to side plates with four

binding-head screws.

c) Insert two fasteners into the holes in the

mounting surface that correspond to the key-

-3-

INSTALLATION SECTION 100-020-200 JUNE 1983

holes in the back plate. Tighten them loosely so that approximately 3/8-in. gap remains between the head of the fastener and the mounting surface.

install the wall mount assembly by slipping

d)

the two keyholes in the back plate over the two fasteners installed in Step C.

Install the lower two fasteners in the back

e)

plate and tighten all four fasteners securing

the wall mount assembly.

04.27 mounting by reversing the back cover. This will locate the two mounting holes at the top of the MKSU. To reverse the back cover, proceed as follows:

a)

b)

The MKSU must be prepared for wall

Loosen all seven screws securing

cover (Figure 6).

Remove and save the three screws in Figure 6, lift the back cover off.

the back

indicated

FIGURE 7-MKSU

Reinstall the back cover. Secure

d)

four loosened screws.

Reinstall and tighten the three

e)

moved earlier.

04.28 Refer to Figure 8, and complete the wall mount installation as follows:

FASTENERS

SUPP,LIED LOCALLY

it with the

screws re-

FIGURE 6-MKSU

c) Rotate the back cover 180” and realign it so

the two mounting holes project above the

MKSU (Figure 7).

FIGURE 8-MKSU

a) Rest the MKSU on the wall mount assembly

and loosen the two screws located near the bottom of each side of the MKSU.

-4-

WALL

’

INS IALLHl IUN

SECTION 100-020-200

JUNE 1983

Loosely attach the side angles to the lower

b)

sides of the MKSU by sliding their keyholes

:

over the previously mentioned screws.

Ensure that the side angles are properly aligned

c)

with the holes in the mounting bracket and

that the two top holes are aligned with the

holes in the mounting surface.

Fasten the MKSU to the mounting surface

d)

loosely, using the locally-supplied fasteners through the upper mounting holes.

Using four of the provided binding-head

e)

screws, secure the side angles to the wall mounting bracket.

Tighten the screws holding the side angles

f)

to the sides of the MKSU.

Tighten the fasteners securing the MKSU to

Cl)

the mounting surface.

04.29

boards, install the power supply per instructions in Section 100-020-250, Power Supply Installation.

Prior to installing any printed circuit

05

PRINTED CIRCUIT BOARDS

system operations and battery-protected RAM for system data storage are located on the AMMU.

CRDU:

This optional PCB provides the additional memory capacity required for the Automatic

Dialing-Station feature. The RAM containing

the additional memory capacity is battery-

protected. The CRDU mounts directly on the MCBU and/or MDSU. A maximum of two CRDUs are used in STRATA XII, while STRATA XX may use as many as three.

MCBU:

Contains a microprocessor and serves to off-

load the main CPU by processing routine and repetitive data transmission tasks to and from the peripheral equipment. One MCBU is used in STRATA XII, while two are required

in any STRATA XX system that is equipped with more than 32 stations.

MINU:

Generates system tones and provides the switching matrix for the delivery of tones for both paging and intercom connections (one per system).

05.01 both STRATA systems utilize 15 different PCBs, with a maximum of 18 for STRATA XII and 32 for STRATA XX. They are:

MPRU - one per system:

Performs several system functions:

MCAU/AMMU:

The AMMU is required and mounts directly

on the MCAU to form a single unit. All system control functions are performed by the single chip microprocessor located on the MCAU. The system program stored in ROM, RAM for

Complete with all available options,

l

Provides connection points for the 24 VDC input power.

l

Houses the voltage regulators that provide 12 and 5 VDC for system operation.

l

Houses circuitry and connection points for the relay services and music-on-hold (MOH).

l

Houses the external page amplifier.

MCOU (MF or DP):

An interface between the MKSU and the public telephone network or PBX lines. Depending upon local CO requirements, an MF or DP type of MCOU will be provided (MF for DTMF outpulsing, DP for rotary dial outpulsing). Each MCOU serves up to three CO/PBX lines.

MSTU:

An interface between the MKSU and EKTs, which includes a portion.of the system’s solidstate space division matrix. Each MSTU PCB services up to eight EKTs.

MXPU:

Contains the solid-state crosspoints that make up the remainder of the space division switching matrix. Each MXPU services up to 16 stations and provides access to 12 CO lines plus intercom or nine CO lines, depending upon its position in the system.

MDSU:

An optional PCB that serves as an interface

between the DSS console(s) and the MKSU

-5-

INSTALLATION SECTION 100-020-200 JUNE 1983

(each system uses only one MDSU). The MDSU serves up to two fully functional DSS consoles and two DSS consoles which are used as Busy

Lamp Field terminals only.

MSMU/S&J:

The SCNU is required and mounts directly on the MSMU to form a single unit. This optional PC6 serves as an interface between the MKSU and a printer or storage device

used for the SMDR feature. The PCB is equip-

ped with an RS 232C-type interface (one

per system).

MOPU (MF/DP or DP):

An optional PCB that serves as an interface between the MKSU and conventional, single

line telephones or (OPX) lines. An MOPU DP will operate with

rotary dial telephones only. Either DTMF or rotary dial telephones can be used with an MOPU MF/DP PCB. Each MOPU services two extensions. A maximum of two MOPUs can be installed in STRATA XII and three

in STRATA XX.

off-premise extension

Background Music Relay Service:

An optional BR relay (Kl socket, Figure

9), if installed, piovides a dry contact at the BR terminals on the front of the MPRU to control cut-off of BGM during an external page. The relay operates whenever an external page occurs. (A BR relay is required only when BGM is provided via a page amplifier mounted externally.)

NOTE FOR DTMF TELEPHONES:

l

DTMF telephones cannot be Toll Restricted.

l

SK40 R cannot capture a telephone number dialed from a D TMF telephone; however,

the remainder of the call details will

be recorded.

MPLU (MF or DP):

The MPLU PCB is a special assembly of a POPU PCB mounted on an MCOU to form a single unit. This optional PCB allows the bridging of a CO/PBX line (which appears in the STRATA system) with a conventional telephone. “OPL” telephones thus connected will then automatically cause a busy indication within the STRATA system and establish system privacy when initiating or answering a call on the dedicated CO line. Each MPLU serves up to three CO/PBX line/OPL combinations and replaces the MCOU PCB that would usually serve these lines. Maximum is one MP LU per system.

05.10

05.11

must be considered before it is installed in the MKSU, they are:

MPRU’ PCB

The MPRU houses several options that

Options

FIGURE 9

MPRU RELAY SOCKETS & W3 STRAP

Night Relay Service:

An ‘optional NR relay (K2 socket, Figure 9), if installed, provides a dry contact at the terminals on the front of the MPRU. TheW3 strap option (Figure 9) allows the relay to function in one of two modes.

Answering Machine Control - if the

a)

strap remains intact, the relay is operated continuously when the system is in night service. This mode is intended for indirect

control of an answering machine.

Night Bell Control - if the

b)

cut, the relay pulses at a 1-sec. on, 3-sec. off rate whenever the system is in night transfer mode and an incoming call is

ringing the system. This mode is intended to be used for indirect control of an external night bell.

External Page Impedance Selection:

The external page output appears at the ter-

minals labeled 8/600 on the front of the MPRU. The output impedance can be selected

W3

rVR

W3

strap is

i

-’

-6-

Toshiba Strata XII User Guide

Specifications and Main Features

Frequently Asked Questions

User Manual

GENERAL DESCRIPTION

TABLE OF CONTENTS

01 GENERAL

02 PHYSICAL DESCRIPTIONS

03 ELECTRICAL CHARACTERISTICS

04 FEATURES and SERVICES

05 SYSTEM OPERATION

FEATURES and OPERATION

INSTALLATION

TABLE OF CONTENTS

01 GENERAL

02 PACKING

03 MKSU LOCATION REQUIREMENTS

04 MKSU MOUNTING

PRINTED CIRCUIT BOARDS