Toshiba Strata Xii, Strata Xx General Description Manual

							TOSHIBA SYSTEM PRACTICES 
, EL,ECTRONIC KEY TELEPHONE SYSTEM 
I GENERAL DESCRIPTION 
SECTION 100-020-100 
JUNE 1983 
Strata 
XII&XX 
GENERAL DESCRIPTION  
						

							PARAGRAPH SUBJECT PAGE 
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02.00 
02.10 
02.20 
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06.10 
06.20 
06.30 
06.40 
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07.00 
07.10 
07.20 
FIGURE NO. 
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GENERAL DESCRIPTION 
SECTION 100-020-100 
JUNE 1983 
GENERAL DESCRIPTION 
TABLE OF CONTENTS 
4 
TABLE OF CONTENTS .......................... i 
GENERAL ................................... 1 
Summary Description 
........................ 1 
PHYSICAL DESCRIPTIONS 
....................... 1 
Key Service Units .......................... 1 
Electronic Key Telephones. .................... 
1 
Direct Station Selection Console ................ 6 
ELECTRICAL CHARACTERISTICS 
.................. 8 
TABLE A (Electrical Characteristics) 
.............. 8 
FEATURES and SERVICES. 
....................... 8 
TABLE B (Standard Features) 
................... 9 
TABLE C (Optional Features) ................... 9 
SYSTEM OPERATION ........................... 9 
SYSTEM CONFIGURATION ....................... 
11 
Key Service Unit (MKSU) 
..................... 
11 
Power Supply Assembly. ..................... 14 
Station Equipment 
.......................... 14 
Installation. 
............................... 15 
Maintenance 
.............................. 15 
FEATURES and OPERATION 
...................... 15 
General .................................. 15 
Standard Features 
.......................... 15 
Optional Features 
........................... 18 
ILLUSTRATION LIST 
TITLE PAGE 
STRATA XII MKSU (Dimensions) ................... 2 
STRATA XX MKSU (Dimensions) 
................... 3 
STRATA XII MKSU (Interior) 
...................... 4 
STRATA XX MKSU (Interior) 
...................... 5 
STANDARD 20-key EKT 
......................... 6 
OPTIONAL lo-key 
EKT .......................... 7 
DIRECT STATION SELECTION (DSS) CONSOLE 
........ 7 
SYSTEM DIAGRAM 
............................ 10 
STRATA XII FUNCTIONAL BLOCK DIAGRAM 
.......... 12 
STRATA XX FUNCTIONAL BLOCK DIAGRAM. 
......... 13 
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							01 GENERAL 
01.00 Summary Description 
01.01 The STRATA XII and STRATA XX are 
electronic key telephone systems with many stan- 
dard 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 The STRATA systems include a specially 
designed electronic key telephone (EKT), incor- 
porating, among other standard features, handsfree 
answering and full speakerphone capability. Each 
EKT is connected to the system via industry- 
standard 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. 
01.03 Both systems are electrically compat- 
ible with the public telephone network and are 
also designed to function in a “behind PBX” 
environment. 
01.04 Maintenance procedures are based on 
quickly locating and replacing defective plug-in 
units, keeping service disruption to a minimum. 
02 PHYSICAL DESCRIPTIONS 
02.00 Key Service Units 
02.01 Each of the STRATA MKSUs consist 
of a single metal cabinet (Figures 1 and 2) with 
the following dimensions: 
STRATA XII 
Height: 19.0 inches (483 mm) 
Width: 15.5 inches (394 mm) 
Depth: 12.0 inches (305 mm) 
STRATA XX 
Height: 26.3 inches (668 mm) 
Width: 16.8 inches (427 mm) 
Depth: 12.0 inches (305 mm) 
GENERAL DESCRIPTION 
SECTION 100-020-100 
JUNE 
1983 
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 sub- 
assemblies 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 Each PCB measures 8.7 x 7.1 ins. (220 x 
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 Electronic Key Telephones 
02.1 I Three different Electronic Key Tele- 
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 
The 20-key EKT, Figure 5, measures: 
Height: 4.0 inches (102 mm) 
Width: 8.8 inches (224 mm) 
Depth: 9.1 inches (230 mm) 
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. 
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							GENERAL DESCRIPTION 
SECTION 100-020-100 
JUNE 1983 
19.0 
in 
483 mm) 
FIGURE 1 -STRATA XII MKSU (Dimensions) 
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							--- --- -- -- - - 
SECTION 
FIGURE S-STRATA XX MKSU (Dimensions) 
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JUNE 1983 
3 in 
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mm)  
						

							GENERAL DESCRIPTION 
SECTION 100;020-100 
JUNE 1983 
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FIGURE 3-STRATA XII MKSU (Interior) 
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							GENERAL DESCRIPTION 
SECTION 100-020-100 
JUNE 1983 
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FIGURE 4-STRATA XX MKSU (Interior)  
						

							GENERAL DESCRIPTION 
SECTION 100-020-100 
JUNE 1983 
Ime - Speaker Vc 
Ring Tone 
Voice Leve Intercom 
Feature & 
Function LEDs Speaker Volume 
- 
Dial Tone & Voice 
Level i . . 
Message Waiting 
H& Flash Key 
Handset- 
Do Not Disturb 
#Key . . 
Flexible 
_ 
Assignment Keys 
l COIPBX 
l Automatic Oiating 
l Repertory Dialing 
l Redial 
Dial Pad 
Speaker- 
1 CO/PBX 
Access Kevs 
-I I ntercom 
-Access Key 
/ Modular 
Cord 
n icrophone 
SP iker On/Off 
LgD Conference Key 
I Mute-Key 
Speaker On/Off Key 
FIGURE 5-20-key EKT 
02.20 Direct Station Selection Console 02.13 Software assignment permits the lo- 
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 of s&3&n+?). 
This lo-key EKT has full access to seven CO/PBX 
lines and can receive transferred calls 
on the other 
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. 
02.21 An optional Direct Station Selection 
(DSS) console (Figure 7) is available for both 
systems where the volume of incoming calls war- 
rants 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 
key 
functions and lacking an intercom key (it is on the 
DSS), must accompany the DSS.  02.15 All EKTs feature modular handset 
cords and are connected to the system via four- 
conductor modular line cords. 
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							Handset 
Speaker 
Modular 
Cord 
LitNtHAL UtSCRlPTlON 
SECTION 100-020-100 
JUNE 1983 
Speaker Volume. 
Ring Tone & Intercom 
Voice Level 
Conference Key  Dial Pad 
M;te Key 
FIGURE 6-lo-key EKT 
Feature & 
/ Function LEDs 
Message Waiting 
/ & Flash Key 
_ Do Not Disturb 
Key 
1 
4 
COIPBX 
Access Keys 
J 
I 
Intercom 
Access Key 
icrophone 
FIGURE 7 -DIRECT STATION SELECTION (DSS) CONSOLE 
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							GENERAL DESCRIPTION 
SECTION lot?-020400 
, 
JUNE 1983 
02.23 One 
or two additional DSS consoles may 
be optionally added to either system as BLF 
consoles. Their only function is to provide station 
status information. 03 ELECTRICAL CHARACTERISTICS 
03.01 The electrical characteristics of the 
system are summarized in Table A. 
SUMMARY OF 
Station Loop Limits 
EKT 
OPX (DTMF) 
(DP) 
DSS 
Ringing Tone 
CO Line (idle station) 
(busy station) 
Intercom Line 
Busy Override Tone 
Dial Tone 
(Intercom) 
Ring-back Tone 
Busy Tone 
Do Not Disturb Tone 
Voice Page Warning Tone 
Exec. Override Warning Tone 
Dialing 
Primary Power 
Hold Recall Tone 
Environmental Specifications 
Operating Temperature 
Operating Humidity 
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) 
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) 
03.02 The MKSU operates from an external 
full memory protection for up to five years 
24 VDC power supply. with no external power source applied. 
03.03 Loss of AC power will cause operational 
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 
04 FEATURES and SERVICES 
04.01 
The features and services of the STRATA 
electronic key telephone systems are summarized 
in Tables B and C, which list the standard and 
optional features respectively. 
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