Toshiba Perception E Ex Digital Pbx Installation And Maintenance Manual

							INSTALLATION INSTRUCTIONS 
SECTION 200-255-204 
FEBRUARY1992 
 
TBBOI TB701 
TB601 
TB501 
I I - II 
 n n n 
rluunc *xl- 
IYIVIUU 3 I mrruw 
circuit may be used for a DDIU (-MA or -MAT) 
connection. Use the DDIU Program in Section 200- 
255-300, Programming, to assign the desired port 
(1 -, 4) on the NMDU. 
3.94 The NDCU PCB is installed at a rate of one 
PCB for each group of eight DDIUs. There are no 
strapping options on this PCB. 
NOTE: 
The NMDU and NDCU PCBs are not used 
with the PDIUs. PDlUs use the NDKU PCB. 
4. CABLE CONNECTIONS 
4.00 All connections to the system are made on 
the rear of the basic and expansion cabinets and on 
the Power Failure Transfer Unit. Cables with stan- 
dard male 25pair amphenol-type connectors are 
used for everything except the TTY, SMDR and 
MODEM connectors (which require male RS-232C 
DB25pin connectors). 4.01 Detailed connection information for each cable 
is shown in Chapter 5. 
IMPORTANT! 
Note the station, trunk, DSS console, and 
DDIWPDIU connections are identified by 
the PCB location and circuit number on 
that PCB. These numbers combine to form 
a Port Number and are used in the pro- 
gramming section as the station, DSS con- 
sole, or trunk circuit’s identifier when di- 
rectory numbers and features are assigned. 
4.02 Determine the station and DSS console (or 
data) port numbers as follows (DSS consoles as- 
signed to L or U slots use circuits 1, 3, 5, & 7): 
PCB 
PCB 
LOCATION 
CIRCUIT PORT NO. 
FL LOO - L26orCOO 1 - 8 
I FL uoo- u31 t l-8 1 
I 
1 Example: LO1 2 LO12 
4-19  
						

							INSTALLATION INSTRUCTIONS 
SECTION 200-255-204 
FEBRUARY 1992 
4.03 Determine trunk port numbers as follows: 
I 
PC6 
LOCATION I PCB CIRCUIT I PORT NO. 
I 
1 P,TOO-~15 I 1-4 I 
I 
gx TOO-T15 
uoo - u31 
Example: TO2 1-4 
3 TO23 
5. ELECTRONIC TELEPHONE STATION 
EQUIPMENT INSTALLATION 
5.00 Electronic Telephone Connections 
5.01 See the DEKT Program in Section 200-255- 
300, Programming, for instructions on program- 
ming electronic telephones. The system must be 
told which type of electronic telephone (lo- or 20- 
button, LCD) and what button assignment is re- 
quired. 
5.02 Electronic telephones are connected to the 
MDF via standard twisted-pair jacketed telephone 
cable. (Two-pair wiring is required; however, 3-pair 
wiring is strongly recommended to permit future 
upgrades, such as data, etc.) To accommodate the 
electronic telephone line cord, terminate the cable 
in a modular station connector block (RJ25) at the 
station location. The standard modular electronic 
telephone cord length is 7 feet (the maximum 
allowed length is 25 feet). 
5.03 The overall length of the electronic telephone 
cable run from equipment cabinet to phone must 
not exceed 1,000 feet (305 M), 24 AWG cable. 
IMPORTANT! 
When installing the electronic telephone 
cable, do not run parallel to and within 3 
feet of an AC power line. Such power lines 
should be crossed at right angles (90”) 
only. 
5.04 Electronic telephone connection details are 
shown in Figure 4-23. 
5.10 Electronic Telephone Wall Mounting 
5.11 All electronic telephones are wall-mounted in 
the same manner, and they may be mounted on a wall or any other flat, vertical surface to which the 
base can be secured. When selecting the mounting 
site, consider the electronic telephone’s weight and 
the additional stresses to which the mounting will 
be subjected. 
5.12 Loosen the four captive screws securing the 
electronic telephone’s base, and remove the base 
(Figure 4-24). 
5.13 Using a cutter, remove the handset hanger 
from the base. Insert the handset hanger in the slot 
provided on the front of the telephone (Figure 4- 
25). The hanger fits in the notch on the handset. 
5.14 Rotate the mounting base 180” and secure to 
the telephone with the four captive screws (Figure 
4-26). 
5.15 Connect the electronic telephone to the wall 
modular connector with a short cord (approximately 
3 inch length). Route the cord into the hollow 
portion of the base, then mount the electronic 
telephone on the wail mounting connector. Test 
each electronic telephone using the TTRM Pro- 
gram, Section 200-255-300, Programming. 
5.20 Off-hook Call Announce 
5.21 The Off-hook Call Announce (OCA) feature 
enables an electronic telephone to originate and 
receive voice announcement when the station’s 
handset is off-hook. Standard telephones can origi- 
nate off-hook call announces, however, it cannot 
receive them. A station user is allowed or denied 
the ability to originate the Off-hook Call Announce 
feature in the DCOS Program. In order to receive 
the Off-hook Call Announce feature, PCBs are 
required to be installed in each affected electronic 
telephone and the cabinet. 
5.22 A PCB called NOCU is required to be installed 
in the cabinet. Each NOCU provides eight Off-hook 
Call Announce circuits. This PCB takes up a station 
slot. Therefore, for each NOCU installed, station 
capacity is decreased by eight stations. 
5.23 HVSU and HVSI PCBs inside a 6500-series 
electronic telephone allow the electronic telephone 
to receive the Off-hook Call Announce feature. 
4-20  
						

							INSTALLATION INSTRUCTIONS 
SECTION 200-255-204 
FEBRUARY1992 
NEKU PCB 
PCB CONNECTOR 
1 
CKT 
1 
CKT 
2 
CKT 
3 
CKT 
4 
CKT 
5 
CKT 
c 
26 - 
1 - 
27 - 
2 - 
28 - 
3 - 
29 - 
4 - 
30 - 
5 - 
31 - 
6 - 
32 - 
7 - 
33 - 
8 - 
34 - 
9 - 
35 - 
10 - 
36 - 
11 - 
37 - 
CKT 
8 
1 RL7 i ; 
CROSS-CONNECT 
BLOCK 
(W-BL) 
(BL-W) 
W-0) 
(0-W 
W-G) 
G-W 
(W-BR) VI,.I,V 
TAILCO 
TO TELEPWNF *p 
TO TELEPHONE #3 
TO TELEPHONE #4 
TO TELEPHONE #5 
TO TELEPHONE #6 
(G-W 1 f RL7 
(BK-BR) i 1 DTL7 
(BR-BK) ; ! DRL7 
W-S) , I TL8 
(S-BK) I ; 
RL8 
(Y-W ; ; DTL8 
(BL-Y) 
I I DRL8 
1 
. 
 25-PAIR CABLE 
“J” CABLE CONNECTOR PINS TO 
TO TELEPHONE 
TELEPHONE #7 
#8 
FlGURE4-23-ELECTRONICTELEPHONECONNECTION 
4-21  
						

							INSTALLATION INSTRUCTIONS 
SECTION 200-255-204 
FEBRUARY1992 
HANDSET 
HANGER PLASTIC 
FIGURE 4-24--REMOVAL OF 
ELECTRONIC TELEPHONE BASE 
FIGURE 4-25-REMOVAL OF HANDSET HANGER 
NOTE: 3) Position the HVSWHVSI assembly on the 
standoffs inside the base, and secure with the 
two screws provided. 
It is not recommended to equip electronic 4) Connect the HVSWHVSI PCBs to the elec- 
telephones with both Off-hook Cal/Announce tronic telephone PCB as shown in Figure 4- 
and the headset option at the same time. 
2a. 
5.24 The installation of the HVSWHVSI PCBs has 
to be done in accordance with the following steps: FIGURE 4-26-INSTALLATION OF 
MOUNTING BASE FOR WALL-MOUNT INSTALLATION 
1) Remove the base as described in Paragraph 
5.12. : 
NOTE: 
Exercise care when assembling the HVSU 
P CB to the HVSl PC5 to prevent damage to 
the connector pins. 
2) Align the P5 connector on the HVSI PCB with 
its receptacle on the HVSU PCB (Figure 4- 
27). Apply firm, even pressure to the PCBs to 
ensure thatthe connectors mate properly (they 
click when mated properly). 
5) Reinstall the electronic telephone base and 
secure it with its four captive screws. 
4-22  
						

							TO HVSU 
CONNECTOR 
ON MAIN PCB 
INSIDE 
TELEPHONE HSVI 8 /‘” 
Q i 
FIGURE 4-27-HVSI/HVSU INSTALLATION 
HKT65-20KSD 
ROOM NOISE 
I HHEU 
 CONNECTOR 
I 
HVSU 
-WIRE 
CONNECTOR 
W203 
FIGURE 4-28 
ELECTRONIC TELEPHONE PC8 CONNECTIONS INSTALLATION INSTRUCTIONS 
SECTION 200-255-204 
FEBRUARY 1992 
5.25 Two pairs of the provided 3-pair modular line 
connector connect the electronic telephone to the 
DEKT port, and the other pair connects it to the 
NOCU PCB. 
5.26 NOCU connection details are shown in Figure 
4-29. 
5.30 Carbon Handset Transmitter Installation 
5.31 
If a customer-supplied carbon-type handset 
is used with the 6500-series electronic telephone, 
it is necessary to cut two jumper straps located on 
the main PCB inside the telephone. Cut the jump- 
ers as follows: 
5.32 Loosen the four captive screws securing the 
electronic telephone’s base, and remove the base 
(Figure 4-24). 
5.33 Locate the two carbon straps 
W201 and W202 
(Figure 4-30). Cut both straps. 
5.34 Cut the W401 strap for proper LCD functions 
in A.05 (and below) software. 
5.35 Reinstall the electronic telephone’s base and 
secure using the four captive screws. 
5.36 Remove the Toshiba handset and connect 
the carbon-type handset. 
5.40 HHEU Installation 
5.41 
The HHEU option provides the interface and 
control for a customer-supplied headset. 
5.42 Loosen the four captive screws securing the 
electronic telephone’s mounting base, and remove 
the base as shown in Figure 4-24. 
5.43 Using a screwdriver or other suitable tool, 
remove the plastic access tab located on the back 
of the mounting base (Figure 4-31). The HHEU 
modular connector is accessed through this open- 
ing. 
5.44 Set HEADSET/EXT IO switch SW601 on 
the HHEU PCB (Figure 4-32) to the 
HEADSET 
position. 
4-23  
						

							INSTALLATION INSTRUCTIONS 
SECTION 200-255-204 
FEBRUARY 1992 
CKT 
1 
CKT 
2 
CKT 
3 
CKT 
4 
CKT 
5 
CKT 
6 
CKT 
7 
CKT 
a NOCU PCB CROSS-CONNECT BLOCK 
I 
- 
- 
TLI (-1 26 
I 
RLI f ’ 
I l- 
TL2 1 ! 28 
RL2I ! 
I 0 3 - 
TL3 I ] 
I 30 - 
RL3 ’ ! 
I 5 - 
TL4 ! ; 
I 32 - 
RL4 ! ; 
7 - 
I 
TL5 ! , 
RL5 f ; 34 - 
I 9 - 
TL6 1 I 36 
I 
RL6II ,, 
I 
TL7 1 I 38 
I 
TL8Il ,3 
I 
RL7 ; l 4. 
I 
RL8I ! 
I ’ 15 - 
\,I 
I 
“J” CABLE CONNECTOR PINSr 
(W-BL) I-: I & TLl 
@L-W) ; I RLI 
(W-G) 1 ; 
TL2 
I 
(G-W) ; / RL2 
(W-S) I ; TL3 
(S-W I j RL3 
(R-O) ! ’ TL4 
RL4 
TL5 
RL.5 
TL6 
RL6 
TL7 
RL7 
* 
I=) To 
EKT#7 - 
TO 
EKT #8 
d RJ-25 
- 
f 
EKT WITH HVSU 
1 
PAIR FOR OCA 
‘25-PAIR CABLE *CORRECT POLARITY 
FIGURE 4-29-OFF-HOOK CALL ANNOUNCE CONNECTION (NOCU) 
LCD STRAP 
w401 
HKT6520KSD 
CARBON STRAPS 
w201 
FIGURE 4-30-LOCATION OF CARBON STRAPS 
FIGURE 4-31-REMOVAL OF 
HHEU MODULAR CONNECTOR ACCESS TAB 
4-24  
						

							COMPONENT SIDE 
OF HHEU 
FIGURE 4-32-INSTALLATION OF 
HHEU UPGRADE OPTION INSTALLATlONlNSTRUCTlONS 
SECTlON200-255-204 
FEBRUARY1992 
5.45 Position the HHEU PCB on the standoffs 
inside the mounting base, and secure in place 
using the two screws provided. 
5.46 Connect the HHEU PCB to the electronic 
telephone PCB (Figure 4-30). 
5.47 Connect the headset modular cord through 
the access hole created in Paragraph 5.43 of this 
procedure. 
5.48 Reinstall the electronic telephone’s base and 
secure in place using the four captive screws. 
5.50 Attendant Console Connection 
5.51 The attendant console is connected to the 
MDF via an industry-standard 25pair cable 
equipped with a female amphenol-type connector 
at the console location. 
5.52 Connection details for the attendant console(s) 
are shown in Figures 4-33 and 4-34. 
5.53 Each attendant console requires a port on an 
, NEKU (LOOI) CROSS-CONNECT BLOCK 
CONNECTOR Jl -P, fl 
CONNECTOR JG-Pex 
26 
1 
27 
2 
29 
4 
5 
44 
45 
46 
47 
48 
49 
a 
9 
IO 
11 
12 
13 /  / - (W-BL) ; ; - TLOOl --  - (W-BL) ; ; 
TLOOl -- 
- @L-W) i , - RLOO~ --  - (BL-W) ; , 
- RLOOl -- 
- (W-D) ’ ’ - DTLOOl --  - (W-O) ’ ’ 
- (O-W) ; ( - DRLOOI --  . DTLOOl -- 
- (O-W) ; ( 
DRLOOI -- 
I I  I I 
I I  I I 
I I  I I 
I I  I I 
I I  I I 
I I  I I 
I I  I I 
I I  I I 
I I  I I 
- (W-BR) : I - EMT0 --  - (W-BR) : , 
- EMT0 -- 
- (BR-W) ; ; - INITO -- 
- (BR-WI ; ; INITO -- 
- (S-W) , ,  - (S-W) , , - MPJINO --  - MAJINO -- 
I I  I I 
- (Y-EM) ; ; -AlTOEG --  - (Y-BR) ; ; 
-AlTOEG -- 
-(Y-S) i I.-  - (Y-S) i 1 
EG --  EG -- 
- w-w ; ; -  - W-W ; ; EG --  EG -- 
- (V-0) , , -  - (V-0) , , EG --  EG -- 
- (V-G) : 8  - (V-G) : 8 - 
EG --  EG -- 
- (V-BR) ; ;  - (V-BR) ; ; - EG --  EG -- 
I I  I I 
- (G-R) ! :  - (G-R) ! : -AnO-24V --  - AnO -24V - - 
- (BR-R) ; ;  - (BR-R) ; ; - 
-24V - -  -24V - - 
- (S-R) , ,  - (S-R) , , - 
-24V - -  -24V - - 
I >_  I >__ 
- (BL-BK) I  - (BL-BK) I I -24V - -  -24V - - 
I 
- (O-BK) , ,  - (O-BK) , , - 
-24V - -  -24V - - 
- (G-BK) : ,  - (G-BK) : , - 
-24V - -  -24V - - (W-BL) + 
(BL-W) 4 
(W-0) - 
(0-w) + 
I I 
I I 
I I 
I I 
I I 
I I 
I 
I I 
(W-BR) d+ 
(BR-W) I 
(S-W) g- 
(Y-BR) = 
(Y-S) 
I 
(V-BL) I 
(V-BR) I 
I 1 
(G-R) d--i- 
(BR-R) +/-- 
6-R) - 
25PAIR CABLE’ 25PAIR CABLE/ 
26 
1 
27 
2 
29 
4 
5 
44 
45 
46 
47 
48 
49 
a 
9 
10 
11 
12 
13 
CONSOLE 
CONNECTOR CORD 
CONSOLE #O 
FIGURE 4-33-AlTENDANTCONSOLE#OCONNECTlON 
4-25  
						

							INSTALLATION INSTRUCTIONS 
SECTION 200-255-204 
FEBRUARY1992 
NEKU P, (L151) 
PexWll) CROSS-CONNECT BLOCK 
CONNECTOR J501-P, 
CONNECTOR J5-Pex I- 
 
(W-EL) ! r - TL -- (W-EL) 
(BL-W) ; ; - RL -- (BL-W) 
W-0) I - DTL -- (W-O) 
(O-W) ; : - DAL -- (O-W) 
I 
’ I 
’ I 
’ I 
’ I 
’ I 
1 I  I 
(W-W --cy - EMT1 -- (w-BR) 
(BR-W) ; ; iNIT -- (BR-W) 
(S-W) -- MPlJlNl -- (S-W) 
’ I 
W-W ; ; -- Al71 EG -- (Y-BR) 
(Y-S) -v- EG -- (Y-S) 
W-B’-) ; ! .- EG -- W-W 
W-0) --+- EG -- (V-0) 
W-G) ! i .- EG -- (V-G) 
(V-W ; ; .- EG -- (V-BR) 
’ , 
(G-R) ’ : -ATT1 -24V -- (G-R) 
(BR-R) ( ; .- -24V -- (BR-R) 
(S-R) : , .- -24V -- (S-R) 
(BL-BK) ; j - -24V -- (BL-BK) 
(O-BK) , , -24V -- (O-BK) 
(G-BK) ---cy - -24V - (G-BK) 
‘ ’ 
t* l-l w ATTENDANT 
CONSOLE #l 
25-PAIR CABLE f 25-PAIR CABLE f 
-.-__-- _ -_ _--_.--_.---_.--.- . -- ____ ---_-_. 
NEKU PCB to provide a speech path. The NEKUs 
must be installed as follows: 
PERCEPTlONe 
Att#O-PCB position LOO Circuit #l 
Att#l -PCB position L15 Circuit #l connected to the MDF via standard twisted-pair 
telephone cables. The console connection is made 
using only the data pair. An RJ25 modular connec- 
tor should be attached to the instrument-end of the 
telephone cable to permit connection to the DSS 
console. 
PERCEPTlONe, 
Att#O-PCB position LOO Circuit #1- 
Att#l-PCB position LO1 Circuit #l 5.63 The overall length of the DSS console cable 
run from the equipment cabinet must not exceed 
500 feet (152.5 M), 24 AWG cable. 
NOTE: IMPORTANT! 
DO NOT cross connect an electronic tele- 
phone with either of these ports if the associ- 
ated aftendant console is installed. 
5.60 DSS Console Connections When installing the DSS console cable, do 
not run parallel to and within 3’ of an AC 
power line. Such power lines should be 
crossed at right angles (90”) only. 
5.61 See the DSS Program in Section 200-255- 
300, Programming, to input information concerning 
the electronic DSS consoles. 5.64 DSS console(s) connection details are shown 
in Figures 4-35 and 4-36, PERCEPTION, and ex, 
respectively. 
5.62 The DSS console must be positioned adja- 
cent to an electronic telephone (preferably an LCD 
model). DSS consoles use 2-pair wiring and are 5.70 Digital Data Interface Unit Connections 
(DDIU) 
5.71 See the DDIU Program in Section 200-255- 
300, Programming, to input information concerning 
FIGURE 4-34-ATTENOANT CONSOLE #l CONNECTION 
4-26  
						

							INSTALLATION INSTRUCTIONS 
SECTION 200-255-204 
FEBRUARY1992 
NDSU PCB CONNECTOR 
MODULAR JACK 
- TLI - 26 - W-BL 
CKT - RLl - 1 - BL-w 
1 
- DTLl - 27 - w-0 
- DRLl - 2 - O-w 
- TL2 - 28 - W-G 
CKT - RI-2 - 3 - G-W 
2 
- DTL2 - 29 - W-BR 
DSS CONSOLE #l - DRL2 - 4 - BR-w 
- TL3 - 30 - w-s 
CKT - RL3 - 5 - S-w 
3 
- DTL3 - 31 - R-BL 
CONSOLE #3 
- DRL3 - 6 - BL-R 
- TL4 - 32 - R-O 
CKT - RL4 - 7 - O-R 
4 
- DTL4 - 33 - R-G 
- DRL4 - 8 - G-R 
NDSU 
FIGURE 4-35-DSS CONSOLE CONNECTION FOR PERCEPTION, “c” SLOT 
PCB CONNECTOR 
- TLI - 26 - W-BL 
- RLl - I - BL-w 
- DTLl - 27 - W-O 
CKT - DRLl - 2 - O-w 
1 - TL2 
I”” > NOT 
- DTL2 
USED 
DRL2 
- TL3 - 30 - W-S 
- RL3 - 5 - S-w 
- DTL3 - 
31 - R-BL 
WI- - DRL3 - 10 - BL-R 
3 
NOT 
USED 
- TL.5 - 34 - R-BR 
- RL5 - 9 - BR-R 
- DTL5 - 
35 - 
R-S 
CKT 
-DRL5 - 10 -S-R 
5 
NOT 
USED 
- TL7 - 38 - BK-G 
- RL7 - 13 - G-BK 
CKl - DTL7 - 39 - BK-BR 
7 - DRL7 - 14 - BR-BK 
- TL8 
-RL8 > NOT 
- DTL8 
USED 
- DRL8 
I 
I 
c,m,,nr 1 -c nnn #tm.,r,e, c #b- . . . . .-a-.-.. m-e ---------~~ 
____ -_-.. ..-.. -- --- 
rluunc 4-30-1~33 ldJNSULt WNNtl; I ION HJK PERCEPTION, “U” SLOTS AND PERCEPTION, ‘I” SLOTS 
4-27  
						

							INSTALLATION INSTRUCTIONS 
SECTION 200-255-204 
FEBRUARY1992 
Digital Data Interface Units. The system must be 
told which type of DDIU (-MA or -MAT) is installed 
at each location. 1) Remove the electronic telephone base (see 
Paragraph 5.12). 
5.72 Digital Data Interface Units requireonlysingle- 
pair wiring and are connected to the MDF via 
standard twisted-pair telephone cables. 
NOTE: 2) Replace the telephone base with the DDIU- 
MAT. 
NOTE: 
An electronic telephone with a DDIlJ-MAT 
attached cannot be wall-mounted. 
The DDIU-MAT requires an additional two- 
pair for electronic telephone operation. (For 
this reason, three-pair cab/e should be used at 
locations where a DDIU-MATmaybe installed.) 5.82 The DDIU-MAT requires four types of con- 
nections for proper operation. 
l Power supply (to power outlet). 
l 25-pin female RS-232C connector (to data de- 
5.73 Digital Data Interface Unit connection details 
are shown in Figure 4-37. vice). 
l 2-pair modular line cord (to electronic telephone). 
l 3-pair modular connector (to LCECYNCEC). 
5.80 DDIU-MAT 5.83 The power supply (provided) connects the 
DDIU-MAT to a 117 VAC wall outlet. The 25-pin 
5.81 The DDIU-MAT (Figure4-38) mounts directly 
female RS-232C connector interfaces with the cus- 
on the bottom of an electronic telephone (forming a 
tomer-supplied Data Terminal Equipment (DTE) 
single unit) as follows: and uses the following pins: 
, NDCU PCB CROSS-CONNECT BLOCK \. 
RJll T 
CKT 
TLI I-‘ 26 
I 
1 RLl I ’ 
I 1 
PI/-r TL2 f ! 26 
I 1 
Ur\l 
2 
CKT 
3 
CKT 
4 
CKT 
5 
CKT 
6 
CKT 
7 
CKT 
8 
- (W-BL) 
- (EL-W) 
- (W-G) 
- (G-W)  AL2 i ! 
I r 3 
TL3 I ; 
I ’ 30 
- 
RL3 1 ; 
I 5 
TL4 ’ j 
I 32 
- 
RL4 ! I 
7 
TL5 ! ; 34 
I (R-BR) : ’ 
I ’ - TO RL5 j , 
9 - (BR-R) I ’ DDIU #5 I 
TL6 ] , 
36 (BK-EL) ’ f TL5 --I  lx5 - 
I 
RL6II ,, / , TL6 -* J-0 
I 
TL7 ; I 36 (BL-BK) ’ ; 
,qL6 --] DDlU#6 
I ’ - (BK-G) ; ; TL7 -* l-0 
TL8 I I ,3 
- I ’ (G-BK) / f RL7 --] DDIU #7 
RL7 I ’ do 
RL6h ,5 (BK-S) ; ] 
I ’ (S-BK) ; : TO 
DDIU #8 
L-1 RJ-25 
“J” CABLE 
‘25-PAIR CABLE *CORRECT POLARITY 
CONNECTOR PINS 
I I 
DDIU-MA 
DDIU-MAT 
FIGURE 4-37-DIGITAL DATA INTERFACE UNIT CONNECTION (DDIU-MA and DDIU-MAT) 
4-28