Toshiba Strata Vi Electronic Key Telephone System Installation And Maintenance Manual

							exist to allow the dissipation of heat 
generated by the power supply and 
NIKSU. 
Humidity at the MKSU loca- 
tion should be within 2Q-80% (without 
condensation), and the 
temperature 
should be relatively constant within a 
range of O-50’ C. 
Exposure to dust 
and airborne chemicals should also be 
taken into consideration. 
The MKSU must be located so 
that all stations are within 1000 cable 
feet of it. Acceptable cable is 22 or 
24 AWG inside telephone station cable, 
jacketed but not shielded, having two 
or more wire pairs. 
The MKSU is designed for 
wall mounting, but 
comes from the factory configured for 
table mounting. For wall 
instructions, refer to Paragraph 
Since the MKSU is already 
configured for table mounting, the only 
requirement is to choose a suitable 
location and proceed to Section 
_ 100-006-250, Power Supply Instailstion. 
--- 
Prepare the MKSU for wall 
mounting by reversing the 
back cover 
to expose the two top mounting holes. 
Proceed as follows: 
Remove and save the five screws 
securing the back cover. 
Rotate the back cover 180°, and 
realign it so the flanges with the 
two mounting holes project above the top of the MKSU, as shown in 
Figure- 2. 
Reinstall 
the back cover, and 
secure it with the five screws that 
were removed earlier. 
ALL 
2 
Secure the MKSU, as shown 
in Figures 2 and 3, with fasteners 
through the upper two holes and the 
single lower 
hole in the backplate. 
The fasteners should be either l/4-inch 
molly screws, 
toggle bolts, or lag 
screws, 
depending upon the type of 
wall surface being used. 
WALL  
						

							The MTOU houses several 
options that must be considered before 
it is installed in the MKSU, they are: 
Rackground music relay service-- 
the optional BR relay, -if installed, 
provides a dry contact at the BR 
terminals on the front of the 
IVITOU to control cut-off of BGM 
during an external page. The relay 
operates whenever an external page 
occurs. 
Night relay service-the optional 
NR relay, if installed, will provide 
a dry contact at the NR terminals 
on the front of the MTOU 
PCB. 
The W3 strap option (Figure 4) on 
the MTOU allows the NR relay to 
function in one of two modes. 
a) Answering Machine Control- 
if the W3 strap is not cut, 
the relay’ is operated contin- 
uously when the system is in 
night service. This mode is 
intended for indirect control 
of an answering machine. 
b) Night Bell Control-if the W3 
strap is cut, the relay pulses 
at a l-see. on, 
3-sec. off 
rate when the system is in night service and an incoming 
call is ringing the system. 
The mode is intended to be 
used for indirect control of 
an external night bell. 
External page impedance selec- 
tion-the external 
page 
output 
appears at the terminals labeled 
8/6OO on the front of the MTOU. 
The output impedance can be se- 
lected to be 8 ohms or 600 ohms. 
Tf 8 ohms is selected, the output 
: will be via a 3-watt amplifier oil 
the NITOU, and the voice path will 
be one way. If 606 ohms is 
selected, an external. PA amplifier 
or talk-baak amplifier is required 
and the internal voice path will be 
two way. 
To equip either of the two 
relay serviee functions; obtain the op- 
tional relay from your Toshiba supplier 
and install it in the proper loeation on 
the 
!VlTOIJ, per Figure 5. 
External page impedance is 
selected with the SW2 switch located 
adjacent to the relay sockets on the 
r%ITOU PCB (Figure 5). Decide if 8- or 
600-ohm impedance is required, then 
make the selection by positioning the 
SW2 switch to ‘r81f or “600”, whichever 
is requi.red. Figure 5 shows 
the switch 
in the 8-ohm position.  
						

							A maximum of seven PCBs 
can be installed in the NIKSU, 
They 
are: 
i%lTOU (Tone Unit-k-one per system. 
CRDU (Repertory Dial Unit)-one 
per system, to be installed 
the 
NlCCU PCB when the Automatic 
Dialing-Station option is required. 
NlCCU (Central Control Unit)-one 
per system. 
MSTU (Station Interface Unit)- CO 
1.W co 1,5,6 Ext 10-17 
Ext. 18-25 
install one for each group of eight 
stations. System maximum is two 
(16 stations), 
MCOU (Central Office Unit)--in- Disconnect the EPSA from the 
115 VAC outlet. 
stall one for each group of three With the supplied 
CO/PBX lines. System maximum is cord, connect the EPSA to the MTOU 
two (six lines). Two types of PCB and MKSU ground (see Figure 7). 
MCOU are available. Secure the power cord to the MTOU 
with the plastic cable clamp provided. 
a) ,MF-to be used when DTMF 
outpulsing is required. 
b) DP-to be used when rotary dial 
outpulsing is required. 
The MTOU front panel pro- 
vides the connection point for the 24 _ 
_ VDC input from the external power 
supply (EPSA). Therefore, it must be 
installed first. 
2 Install the MTOU PCB in the 
MKSU as shown in Figure 6. 
Plug the EPSA into a 115 
outlet and check its output 
voltage to be sure it is 23.2-28.2 
volts. If the voltage is not within 
these limits, repair or replace the 
EPSA before proceeding.  
						

							The MTOU houses several 
options that must be considered before 
it is installed in the MKSU, they are: 
Background music relay servicz-- 
the optional BR relay, if installed, 
provides a dry contact at the 
BR 
terminals on the front of the 
MTOU to control cut-off of BGM 
during an external page. The, relay 
operates whenever an external page 
occurs. 
Night relay service-the optional 
NR relay, if installed, will provide 
a dry contact at the NR terminals 
on the front of the MTOU PCB. 
The W3 strap option (Figure 4) on 
the MTOU allows the NR relay to 
function in one of two modes. 
a) Answering Machine Control- 
if the W3 strap is not cut, 
the relay is operated eontin- 
uously when the system is in 
night service. This mode is 
intended for indirect control 
of an answering machine. 
b) Night Bell Control-if the W3 
strap is cut, the relay pulses 
at a l-see. on, 3-see. off 
rate when the system is in night service and an incoming 
call is ringing the system. 
The mode 
is intended to be 
used for indirect control of 
an external night 
bell. 
External page impedance selec- 
tion-the external 
page output 
appears at the terminals labeled 
8/600 on the front of the MTQIJ. 
The output impedance can be se- 
lected to 
be 8 ohms or 600 ohms. 
If 
8 ohms is selected, the output 
will be via a 3-watt amplifier 0;) 
the NITCYU, and the voice path will 
be one way. If 600 ohms is 
selected, an external, P4 amplifier 
or talk-back amplifier is required 
and the internal voice path will be 
two way. 
To equip either of the two 
relay service functions; obtain the op- 
tional relay 
from your Toshiba supplier 
and install it in the proper location on 
the !VlTOU, per Figure 5, 
External page impedance 
is 
selected with the SW2 switch located 
adjacent to the relay sockets on the 
VITOU PCB (Figure 5). Decide if 8- or 
600-ohm impedance is required, then 
make the selection by positioning the 
SW2 switch to “8” or “600”, whichever 
is required. Figure 5 shows the switch 
in the 8-ohm position.  
						

							A maximum of seven PCBs 
can be installed in the NIKSU. They 
are: 
MTOU (Tone Unit)--one per system. 
CRDU (Repertory Dial Unit)-one 
per system, to be installed the 
NlCCU PCB when the Automatic 
Dialing-Station option is required. 
MCCU (Central Control Unit)-one 
per system. 
0 
c 
install one for each group of eight 
stations. System maximum is two 
(16 stations). 
MCOU (Central Office Unit)-in- 
stall one for each group of three 
CO/PBX lines. System maximum is 
two (six lines). Two types of 
MCOU are available. 
a) NIF-to be used when DTMF 
outpulsing is required. 
b) DP-to be used when rotary dial 
outpulsing is required. 
The MTOU front panel pro- 
vides the connection point for the 24 _ 
_ VDC input from the external power  MSTU (Station Interface Unit)- 
C0’1.2.3 co 4,5,6 Ext 10-17 Ext. 18-25 
Disconnect the EPSA from the 
115 VAC outlet. With the supplied 
cord, connect the EPSA to the MTOU 
PCB and MKSU ground (see Figure ‘7). 
Secure the power cord to the MTOU 
with the plastic cable clamp provided. 
supply (EPSA). Therefore, it must be 
installed first. 
2 Install the MTOU PCB in the 
MKSU as shown in Figure 6. 
Plug the EPSA into a 115 
outlet and cheek its 
output 
voltage to be sure it is 23.2-28.2 
volts, If the voltage is not within 
these limits, repair or replace the 
EPSA before proceeding.  
						

							Ensure that the power switch 
on the MTOU is then plug the 
EPSA into the 115 ;AC outlet and 
measure the voltage at the MTOU input 
terminals. Correct any problems, if 
necessary, before proceeding. Unplug 
the EPSA. 
Mount the CRDU on the 
MCCU if required (see Figure 8), 
Connect the memory back-up 
on the 
MCCU (and on the 
CRDi’if the system is so equipped). 
Refer to Figure 9, locate the SW1 
battery strap on 
the CRDU, and the 
SW3 battery strap on the MCCU; the 
plugs are shown in the off 
or 
disconnected position. To connect each 
battery, remove and reinstall the 
strapping plugs so that they br 
center pin with the pin labeled 
Install the MCCU in the cor- 
rect MMSU position (Figure 6). 
Follow the position arrange- 
ment in Figure 6, and install the 
required MSTU PCB(s). bottom of the MKSiJ shelf (Figure 1 
SW1 BATTERY STRAP 
F 
#1 MSTU serves extensions 10-17. 
#2 1MSTU serves extensions 18-25. 
Select the proper type of 
U PCB (itiF or DP) and install the 
required number in the position(s) shown 
in Figure 6. 
#l MCOU serves CO lines l-3. 
#2 MCOU serves CO lines 4-6. 
a 
Two 66MI-50 split connection 
blocks (Figure 10) are recommended as 
the NRAT.4 VI ?5ain Distribution 
Frame (MDF). 
A 25-pair male-amphenol- 
cable is connected directly to 
the front of each VISTU PCB and 
fastened with the metal bracket that is 
provided (Figure 11). 
Secure the cables to the  
						

							using the plastic cable clamps that are 
provided. Run the cable under the 
MKSU and toward the rear, as shown in 
Figure 12. 
Route the cable from #l 
(Ext. 10-17) to Block A and the 
cable from #2 MSTU (Ext. 18-25) to 
Block B. 
Use the standard color code 
sequence and terminate the cables from the vIS’I’U PC& on the MDF blocks as 
shown in Figures 13 and 14. 
(Use one 
side of each block for each cable.) 
a Terminate the individual 2- 
pair station cables consecutively 
Oil 
each ViDF block; attach them to the 
side opposite the MSTLJ cabie. Slse 
bridging clips 
to connect the 
.Vi S ‘1’ il 
cable pairs to the station cable pairs. 
The cables used for :station 
wiring should be industry standard quad 
or twisted pair. 
3 The overall 
length of the 
cable run must not exceed 1000 ft. for 
24 AWG wire. 
7, At the station locations, ter- 
minate the station cable in a conven- 
tional 4- or S-conductor modular station 
connector to accommodate the modular 
line cord from the EKT. 
The standard 
,nodular EXT cord l.ength is 7 ft., while 
the maximum allowed length is 25 ft. 
Figures 13 and 1.4 show the 
EKT wiring arrangement.  
						

							BRIDGING 
CLIPS 2 PAIR JACKETED 
STATION CABLE 
654321 
66M150 SPLIT BLOCK :T. 17 
3T USED MODULAR CORD  
						

							2 PAIR JACKETED 
EiXT. 20 
I 
66M150 SPLIT BLOCK 
1 EXT. 21 
J 
1 
EXT. 22 
-I 
1 
EXT. 23 
J 
1 
EXT. 24 
-I 
1 EXT. 25 
_I 
T USED MODULAR CORD 
EKT  
						

							The various manufacturers of 
modular station blocks have employed 
different color codes to indicate the 
sequence of pairs in their blocks. 
However, the color code most commonly 
used is sho.wn in Figure 15. Verify the 
configuration of your modular blocks 
before connecting the station cables. 
Intercom codes are assigned 
permanently to specific MSTU cable 
appearances in STRATA VI. Make sure 
the station cables are connected to the 
proper terminals (Figure 15). 
The CO/PBX lines are intro- 
duced into the STRATA VI system via 
modular line cords (no longer than 25 
ft.) connected directly to a jack on the 
IVICOU PCB. Each modular cord con- 
tains three lines. The opposite end of 
each cord then terminates directly into 
an RJ-25 jack provided by the tele- 
phone company. 
#l MCOU serves CO lines 1-3. 
#2 MCOU serves CO lines 4-6. 
Secure the modular cords to 
the MKSU shelf (Figure 16) using the 
plastic cable clamps that are provided. All STRATA VI EKTs may be 
used as desk units or wall-mounted 
telephones. 
Each one measures: 
Width 8.8 inches (224 mm) 
Depth 9.1 inches (230 mm> 
Height 4.0 inches (102 mm) 
and is equipped with 14 line and fea- 
ture keys in addition to its push-button 
dial pad. Six of the keys are utilized 
for central office/PBX lines, two for 
intercom lines and the remaining six 
keys are used for feature operation 
(see Figure 17), 
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