Inter-Tel Imx/Gmx 416/832 Installation Manual

							INTER-TELPRACTICES 
IMX/GMX 416/832 INSTALLATION & -ANCE INSTALLATION 
Issue 1, November 1994 
FIGURE 3-71. INTER-TELDVK U/S-LINE KEYSET “SMALL” LCD 
INS’lALLATION 
FACEPLATE ASSEMBLY (INSIDE VIEW) 
DISPLAY 
WINDOW 
LCD 
CONNECTOR 
RIBBON 
CABLE 
LCD UNll 
CONTROL 
BOARD 
Page 3-127  
						

							INSTALLATION 
Issue 1. November 1994 INTER-TELPRACTICES 
IMX/GMX 416/832 INSTALLATION & MAINTENANCE 
Keyset Installation 
733 Install all Inter-Tel/DVK keysets as follows: 
NOTE: For information on installing the GX and GMX 
keysets, see appendixes A and B in the back of this 
manual. 
(1) Before mounting the modular jack assembly and 
connecting the keyset, measure the voltage on 
the RED terminal of the modular jack assembly 
with respect to the GREEN terminal. (The “com- 
mon” probe of the voltmeter is placed on the 
GREEN terminal.) It must measure +3OVDC 
(f2.0VDC). If -30VDC is measured, check the 
cabling for a reversed pair. 
CAUTION 
If the power pair (W/BL, BL/W) is reversed, in- 
stalling a keyset will open the fuse (or associated 
thermistor) on the KSC-D. If the card has a fuse, 
this affects operation of all keysets, DSWBLF 
Units, and Attendant Computer Consoles con- 
nected to that card. 
(2) Mount the modular jack assembly on the wall. 
(3) Remove the keyset baseplate to expose the con- 
trol board. 
(4) Attach the coiled handset cord to the handset and 
to the handset jack (56) on the bottom of the key- 
set. Place the handset on hook. 
(5) Plug one end of the line cord into the wall- 
mounted modular jack assembly. Plug the other 
end into the line cord jack (Jl) on the bottom of 
the keyset. 
NOTE: To aid in installation and troubleshoot- 
ing, display keysets show their station circuit 
number, extension number, and assigned user 
name for five seconds when power is turned on 
and the line cord is first plugged in. This display 
also appears after a system reset, and whenever 
the line cord is removed and replaced while pow- 
er is on. The station identification displays for 
five seconds, then the keyset changes to the ap 
propriate display, depending on its current status. 
(6) Perform the Inter-Tel/DVK keyset self-test: 
a. While pressing the asterisk (*) and pound (#) 
keys, unplug and replace the keyset line cord. 
b. Release the keys. The keyset rings momen- 
tarily. (Display keysets show a dark display 
- all pixels lit.) c. Lift and replace the handset. The keyset rings 
momentarily. (Display keysets show a blank 
display - no pixels lit.) 
d. Lift and replace the handset. The keyset rings 
momentarily and all LED-equipped keys 
light. (Display keysets show KTS SELF- 
TESTLED MHRIX.) If any of the LEDs do 
not light, return the keyset for repair. 
e. Lift and replace the handset. The keyset rings 
momentarily and all of the LEDs go out. 
(Display keysets show KTS SELF-TEST 
KEY M.tYmIx.) 
f. One at a time, press each of the keys on the 
keyset in any order. A progress tone (or a 
DIMF tone for keypad keys) is heard if the 
key is functioning properly. If the signals are 
not heard, the key is faulty. Return the keyset 
for repair if any key is faulty. 
g. Lift and replace the handset. The audio inte- 
grated module tones are broadcast over the 
speakerphone speaker. (Display keysets 
show KTS SELF-TEST AIM TONES.) 
h. Lift and replace the handset. Audio inte- 
grated module tones of various volume lev- 
els, from softest to loudest, are broadcast 
over the speakerphone speaker. (Display 
keysets show KTS SELF-TEST AIM TONE 
VOLUME.) 
i. Lift and replace the handset. Tones of various 
volume levels, from softest to loudest, are 
broadcast over the speakerphone speaker. 
(Display keysets show KTS SELF-TEST 
AlM SPK VOLUME.) 
j. Lift the handset, then press and release the 
hookswitch. Tones of various volume levels, 
from softest to loudest, are broadcast over the 
handset receiver. (Display keysets show KTS 
SELF-TESI- AIM HS VOLUME.) 
k. Press and release the hookswitch. A continu- 
ous tone is broadcast over the handset receiv- 
er using the primary voice path. (Display 
keysets show KTS SELF-TEST AIM XMT/ 
RCV PRI.) 
1. Press and release the hookswitch. A continu- 
ous tone is broadcast over the handset receiv- 
er using the secondary voice path. (Display 
keysets show KTS SELF-TEST AIM XMT/ 
RCV SEC.) 
m. Press and release the hookswitch. The hand- 
set transmitter is connected to the handset re- 
Page 3-128  
						

							INTER-TELPRACTICES 
IMX/GMX 416/832 INSlALLATION & -ANCE INSTALLATION 
Issue 1, November 1994 
xl. 
0. 
S. 
t. 
ceiver via the primary voice path. (Display 
keysets show KTS SELF-TEST HOT 
HANDSET PRI.) 
While speaking into the handset transmitter, 
determine that sidetone is being received 
over the handset receiver. 
press and release the hookswitch. The hand- 
set transmitter is connected to the handset re- 
ceiver via the secondary voice path. (Display 
keysets show KTS SELF-TEST HOT 
HANDSET SEC.) 
While speaking into the handset transmitter, 
determine that sidetone is being received 
over the handset receiver. 
press and release the hookswitch. The speak- 
erphone microphone is connected to the 
handset receiver. (Display keysets show KTS 
SELF-TEST SPKRPHONE MIC.) 
While speaking into the speakerphone 
microphone (or rubbing a finger over the 
opening to the microphone), determine that 
the sound is being broadcast over the handset 
receiver. 
Place the handset back in its cradle. The key- 
set rings momentarily and it takes about ten 
seconds for the keyset to return to normal op 
eration. (Display keysets show RTS SELF- 
TEST COMPLETED for about five seconds. 
Then, the keyset’s identification, as de- 
scribed in the NOTE to step 5 on page 3-128, 
displays for about five seconds.) 
Replace the keyset if faulty. 
(7) Replace the baseplate. 
(8) The keyset ring tone can be changed by perform- 
ing the steps described in the FEKWREB sec- 
tion on page 4-48. 
(9) 
If necessary, change the keycaps to match the 
way the keyset will be programmed to work. 
Wall Mounting Keysets 
7.34 
(1) 
(2) 
(3) 
(4) 
(5) 
(6) 
To mount the keyset on a wall: 
Remove the keyset baseplate. 
Rotate the baseplate so that the mounting holes 
are at the top. Then position the plate in the de- 
sired location on the wall. 
Mark the location of the keyset mounting holes 
on the wall. Set the baseplate aside. 
Drive a screw into the center of each mounting 
hole marking. Allow the head of the screw to 
protrude approximately y4 inch. 
Replace the baseplate on the keyset with the 
mounting holes at the top. 
Position the mounting holes of the baseplate over 
the screws and slide the keyset into position on 
the wall. 
Optional Headsets 
735 Refer to SPECIFICATIONS, page 2-31, for 
headset requirements. To attach a headset to a keyset: 
(1) 
(2) 
(3) 
(4 
(5) 
Remove the coiled handset cord from the hand- 
set jack on the bottom of the keyset. Leave the 
handset in the cradle. 
Insert the headset modular plug into the jack. 
Plug in the headset power source, if used. 
If the headset has an on/off switch, turn on the 
headset. 
On the keyset, press the SPCL key and enter the 
headset enable feature code (default value is 
315). 
To disable the Met, press SPCL and enter the 
headset disable feature code (default value is 
316). Unplug the headset and reconnect the 
handset. 
Page 3-129  
						

							INSTALLATION 
Issue 1, November 1994 INTER-TELPRACTICES 
IMX/GMX 416/832 INSTALIATION & MAINTENANCE 
Optional Data Port Modules 
736 All Inter-Tel/DVK keysets may be equipped with 
optional Data Port Modules (refer to REPLACEMENT 
PARTS for the part number). The Data Port Module con- 
tains a four-conductor modular jack that can be used to 
connect either a data device (such as a personal comput- 
er with a direct-connect modem) or an LRA and an ex- 
ternal signaling device (such as a loud bell, horn, 
flashing light, etc.) to the 
keyset. 
7.37 Install the Data Port Module as outlined below. 
For a diagram, see Figure 3-72 on page 3-131. 
(1) 
(2) 
(3) 
(4) 
(5) 
(6) 
(7) Remove the keyset baseplate. 
Unplug the line cord from its modular jack. 
Remove the lO-pin shorting plug located on the 
keyset control board. 
Save the shorting plug by taping it to the inside of 
the baseplate. The plug must be replaced if the 
Data Port Module is later removed. 
Align the Data Port Module over the three posts 
protruding from the inside of the baseplate and 
insert the screws (do not over tighten). 
Plug the Data Port Module cable into the pins on 
the keyset control board (where the shorting plug 
was previously located). Make sure the cable 
connector is securely seated. 
Place jumper straps SPl, SP2, SP3, and SP4 on 
the Data Port Module in the appropriate posi- 
tions. Depending on how the Data Port Module 
will be used, refer to one of the two possible set- 
tings outlined in Figure 3-72. 
(8) 
7.38 If connecting a nmlem-equippeddata device, re.- .--\. 
fer to paragraphs 7.38 through 7.40. 
./’ 
If connecting a loud ringing adapter and an er- 
temal signaling &vice, refer to paragraphs 7.41 
through 7.43. To connect a modemsquipped data device: 
The optional Data Port Module can be used to connect a 
zdata device (such as a personal computer) equipped with 
a direct-connection modem to a keyset. The data device 
can be used with the keyset to communicate with remote 
data equipment over voice channels being used for CO 
or intercom calls. The data device’s modem must be ex- 
ternally powered (or capable of operating on 2OmA of 
loop current) and have an RJll CO trunk interface. 
7.39 The data device can be activated using the keyset 
or an auto-dial modem. (For more details and an expla- 
nation of monitoring or transferring the data connection, 
refer to page 4-101 in TENURES). The data device is 
disconnected whenever one of the following occurs: the 
modem attached to the keyset disconnects from the call, 
the called modem disconnects from the call, or the data 
connection is transferred to the keyset’s primary voice 
path and the call is disconnected. , 
7.40 
(1) 
(2) 
(3) Install the data device as follows: 
Insert the modem line cord (which would nor- 
mally be connected to a CO jack) into the modu- 
lar jack on the keyset’s Data Port Module. 
Ensure that the jumper straps on the Data Port 
Module are set to the proper data device 
posi- 
tions. Refer to Figure 3-72. 
Plug the keyset line cord into the keyset’s modu- 
lar jack and reattach the baseplate. 
Page 3-130  
						

							INTER-TELPRACTICES INSTALLATION 
lMX/GMX 416/832 INsmLLATION & MAINTENANCE Issue 1, November 1994 
FIGURE 3-72. INTER-TELJDVK DATA PORT MODULE INSTALLATION 
SE-ITING FOR 
DATA DEVICE SElTlNG 
FOR LRA 
MODULAR 
JACK 
PLUG LOCATION 
(on keyset control 
bc=Jl 
Page 3-131  
						

							INSTALIAITON Issue 1, November 1994 INTER-TELPRACTICES 
JMX/GMX 416/832 INSTALLATION & MAINTENANCE 
7Al To connect a Loud Ringii Adapter (LRA): 
The optional Data Port Module can be used to connect 
external signaling equipment such as loud bells, horns, 
flashing lights, etc. to a keyset. This application is useful 
in areas where the normal ring tone of the keyset cannot 
be heard, such as warehouses and loading docks. The 
signaling device follows the normal ringing patterns of 
the keyset. 
NOTE Since handsfiee intercom calls may be difficult 
to hear in noisy areas, keysets with LEAS installed 
should be programmed for handsfree disable so that us- 
ers are alerted to incoming intercom calls by continuous 
double ring tones. (Refer to FEXlVRB, page 4-55.) 
7.42 An electromechanical LRA device is placed be- 
tween the keyset Data Port Module and the external sig- 
naling equipment to provide the necessary interface 
relay. Refer to page 2-3 1 for LRA device specifications 
and recommendations. A diagram of a typical set-up is 
shown in Figure 3-73 below. 
7.43 Install the LRA as follows: 
(1) Using 24AWG wire, connect the LRA device in- 
put (coil circuit) to the RED and GREEN wires 
(2) 
(3) 
(4) 
(5) 
on a modular jack assembly. Some devices re- 
quire that polarity be observed between the LRA 
input and the modular jack. 
NOTE: In order for the LRA device to operate 
properly, the maximum resistance from the mod- 
ular jack to the LRA should be kept under 100 
Ohms. 
Attach a mod-to-mod line cord to the modular 
jack assembly and to the modular jack on the 
keyset’s Data Port Module. 
Ensure that the jumper straps on the Data Port 
Module are set in the proper LRA positions. Re- 
fer to Figure 3-73 on the previous page. 
Connect the LRA device output (contacts) to the 
signaling device according to the manufacturer’s 
instructions. Use the appropriate gauge wire for 
handling the current/voltage rating of the signal- 
ing device. 
Plug the keyset line cord into the modular jack on 
the back of the keyset and reattach the baseplate. 
FIGURE 3-73. INTER-TEL/DVK LRA SET-UP 
KEYSET DATA 
PORT MODULE MODULAR JACK 
ASSEMBLY LRA DEVICE 
(e.g., relay) SIGNAL DEVICE 
(e.g., bell) 
0 
BK 
NOTE: Each time the keyset rings, the Data Port Module provides 20-26mAof loop current to the LRA. This 
causes the LRA contacts to close and activates the signaling device. The LRA is not affected by the ring tone 
or the ringer volume of the keyset. The LRAmust be capable of operating on 2OmA current (approximately 
2OvDc). 
Page 3-132  
						

							INTER-TELPRACTICES 
IMX/GMX 416/832 INSTALLATION & MAINTENANCE INSTALLATION 
Issue 1, November 1994 
D. IMX 416/832 DIGITAL DSS/BLF UNlT 
INSTALLATION 
7.44 Up to 50 digital keysets can be equipped with up 
to four digital Direct Station Selection/Busy Lamp Field 
(DWBLF) Units each. Each single DSWBLF Unit has 
60 keys for directly accessing up to 60 numbers. The 
numbers can be station extension numbers, hunt group 
pilot numbers, or other system features. 
NOTE: The system can have as many as 50 keyset cir- 
cuits equipped with DSWBLFUnits. For example, there 
could be a maximum of 50 digital keysets (i.e., DKSC 
circuits) equipped with up to four digital DSS/BLF 
Units each. Or, there could be a maximum of 50 KSC or 
KSC-D circuits equipped with one analog DSS/BLF 
Unit each. Or, there could be any combination of the two 
using up to 50 keyset circuits. 
7.45 Digital DSS/BLF Units are physically attached 
to and programmed to be used with specific digital key- 
sets. The units are powered by their own AC transformer 
and do not require a DKSC circuit that is separate from 
the keyset’s circuit. If necessary, all 16 keysets con- 
nected to the same Digital Keyset Card can be equipped 
with up to four digital DSS/BLF Units each. 
NOTE: Digital keysets cannot be equipped with analog 
DSS/BLF Units. Likewise, analog keysets cannot be 
equipped with digital DSS/BLF Units. 
7.46 Unpack and inspect the DSS/BLF Units before 
installing them. 
7.47 Install each digital DSWBLFUnit as outlined be- 
low. For diagrams of the installation, see Figures 3-64 
and3-74onpages3-112and3-134. 
0) 
(2) 
(3) Remove the baseplate on the back of the DSSf 
BLFUnit. 
On the connector board located in the baseplate, 
plug the free end of the PCDPM-to-DSS inter- 
face cable into the main RS-232-C comtector 
(Jl). (The other end of the cable was previously 
attached to the PC Data Port Module on the cor- 
responding keyset; see also Figure 3-64 on page 
3-112.) 
Plug the AC transformer cable into the power 
connector (54) on the baseplate connector board. 
(The transformer will later be plugged into an 
AC power source.) 
NOTE: DSS/BLF Units always require their 
own separate AC transformers. For a diagram of 
AC transformer requirements, refer to Figure 
2-2 on page 2-29. (4) To attach a second DSS/BLFUnit to the first unit 
(see Figure 3-64 on page 3-112): 
a. Plug one end of a DSS-to-DSS interface 
cable into the secondary RS-232-C connec- 
tor (J2) on the baseplate connector board in 
the first unit. 
b. Remove the baseplate on the, back of the 
second DSS/BLF Unit. 
c. Plug the other end of the DSS-to-DSS inter- 
face cable into the main RS-232-C connector 
(Jl) on the baseplate connector board in the 
second unit. 
d. Plug the AC transformer cable into the power 
connector (54) on the baseplate connector 
board in the second unit. (The transformer 
will later be plugged into an AC power 
source.) 
NOTE: If multiple DSWBLF Units are 
installed, each individual unit must be 
equipped with its own AC transformer. Iu 
addition, the PC Data Port Module on the 
corresponding keyset must be equipped with 
its own AC transformer. 
(5) To attach a third or fourth unit, repeat step 4. 
(6) Perform the DSS/BLF Unit self-test: 
a. While holding down the first two keys in row 
one (extension numbers 100 and 101 in the 
default database), plug the main AC trans- 
former unit into an available AC power 
source. (DONOTuse the outlet for the equip 
ment cabinet.) All the keys should light up. If 
an LED does not light, unplug the AC trans- 
former unit and plug it in while holding down 
the first two keys in row one (ext. 100 and 
101). If the test fails again, replace the DSS/ 
BLF Unit. 
b. Ress each key individually (in any order) to 
remove the lit status. When finished, all keys 
should be unlit. If an LED does not go out, 
unplug the 
AC transformer unit and repeat 
steps a and b. If the test fails again, replace 
the DSS/BLF Unit. After all the keys have 
been tested, it takes approximately five sec- 
onds for the DSS/BLF Unit to return to nor- 
mal operation. 
c. Replace the baseplate on the back of the 
DSS/BLF Unit. 
Page 3-133  
						

							DBTALLATION 
Issue 1, November 1994 lNTER-TEL4PRACTIcES 
JMX/GMX 416/832 INS’IALLATION & MAINTENANCE 
FIGURE 3-74. BACK OF DIGITAL DSS/BLF UNIT 
RS-232-C RS-232-C 
CONNECTOR CONNECTOR 
TO KEYSET PC DATA TO 2ND DSS/BLF 
PORT MODULE UNn; IF INSTALLED 
I 
POWER CONNECTOR 
TO AC TRANSFORMER 
/ 
I 
I / Y 
b 
J2 / 
/ 0 
, 
/ 
 
INSIDE OF BASEPLATE BACK OF DIGITAL DSS/BLF UNIT 
‘.. 
 
A ::z: 
J1 A El g$; 
.,.. .v,.,.,.,...,.,. ,.,........ .,.,..... 
B 
0 .::&>: 
.A...& 
‘.:~:;:~:.. m 
Q 
Q 
Page 3-134  
						

							INTER-TELPRACTICES 
IMX/GMX 416/832 INSTALLATION % MAINTENANCE INSTALLATION 
Issue 1, November 1994 
E. ITMX 416/832 ANALOG DSS/BI,F UNIT 
INSTALLATION 
m 7.48 
Up to 50 IMX Direct Station Selection/Busy 
Lamp Field (DSWBLF) Units can be installed on the 
IMX 416/832 System. A Keyset Card (KSC or KSC-D) 
can support up to four analog units. Each DSS/BLF Unit 
has 60 keys for directly accessing up to 60 numbers. The 
numbers can be station extension numbers, hunt group 
I pilot numbers, or other system features. 
NOTE: The system can have as many as 50 keyset cir- 
cuits equipped with DSS/BLFUnits. For example, there 
could be a maximum of 50 KSC or KSC-D circuits 
equipped with one analog DSS/BLFUnit each. Or, there 
could be a maximum of 50 digital keysets (i.e., DKSC 
circuits) equipped with up to four digital DSS/BLF 
Units each. Or, there could be any combination of the 
two using up to 50 keyset circuits. 
7.49 As with keysets, IMX DSWBLF Units require 
three-pair cabling. After they are installed, the DSS/ 
BLF Units must be assigned in database programming 
to be used along with designated keysets. As many of the 
units as desired can be assigned to one keyset. 
I NOTE: Analog keysets cannot be equipped with digital 
DSS/BLF Units. Likewise, digital keysets cannot be 
equipped with analog DSS/BLF Units. 
750 Unpack and inspect the DSS/BLF Units before 
installing them. Each DSS/BLF Unit is shipped with a 
7-foot line cord. 
7.51 Install each IMX DSS/BLF Unit as follows: (1) Before connecting the DSS/BLF Unit to the ap 
propriate Keyset Card, measure the voltage on 
the RED terminal of the modular jack assembly 
with respect to the GREEN terminal. (The “com- 
mon” probe of the voltmeter is placed on the 
GREEN terminal.) It must measure +3OVDC 
(f2.OVDC). If -30VDC is measured, check the 
cabling for a reversed pair. 
(2) Mount the modular jack assembly ‘on the wall. 
(3) Perform the DSS/BLF Unit self-test: 
a. Plug the line cord into the modular jack 
assembly. 
b. While holding down the key at the top of col- 
umn one and the key at the top of column two, 
plug the line cord into the KSU jack on the 
bottom of the DSS/BLF Unit. All the keys 
should light up. If an LED does not light, re- 
move and replace the line cord. If the test 
fails again, replace the DSWBLF Unit. 
c. Press each key individually (in any order) to 
remove the lit status. When finished, all keys 
should be unlit. Ifan LED does not go out, re- 
move and replace the line cord and repeat 
steps b and c. If the test fails again, replace 
the DSS/BLF Unit. After all the keys have 
been tested, it takes approximately 10 sec- 
onds for the DSS/BLF Unit to return to nor- 
mal operation. 
CAUTION 
If the power pair (W/BL, BL/W) is reversed, in- 
stalling a DSWBLFUnit will open the fuse (or as- 
sociated thermistor) on the KSC or KSC-D. If the 
card has a fuse, this affects operation of all 
keysets, DSS/BLF Units, and Attendant Comput- 
er Consoles connected to that card. 
Page 3-135  
						

							INSTALLATION Issue 1, November 1994 INTER-TELPRACTICES 
IMWGMX 416/832 INSTALLATION 8z MAINTENANCE 
F. GMX-416/832 ANALOG DSS/BLF TJNlT 
INSTAUATION 
1 752 Up to 50 single or tandem Direct Station Selec- 
tion/Busy Lamp Field @SS/BLF) Units can be installed 
on the system. A Keyset Card can support up to four 
units. Each single DSS/BLF Unit has 60 keys for direct- 
ly accessing up to 60 numbers. The numbers can be ei- 
ther station extension numbers or hunt group pilot 
numbers. The numbers can be station extension num- 
1 hers, hunt group pilot numbers, or other system features. 
7.53 As with keysets, DSS/BLF Units require three- 
pair cabling. After they are installed, the DSWBLF 
Units must be assigned in database programming to be 
used along with designated keysets. As many of the 
units as desired can be assigned to one keyset. 
NOTE: For information on installing the GX and GMX 
DSS/BLF Units, refer to appendixes A and B in the back 
of this manual. 
7.54 Unpack and inspect the DSWBLF Units before 
installing them. Each DSS/BLF Unit is shipped with a 
7-foot line cord. 
755 Install each Inter-Tel/DVKDSS/BLFUnit as fol- 
lows: 
(1) If installing a tandem unit, connect a second 
modular jack assembly in parallel with the exist- 
ing modular jack assembly. One jack will be used 
for the first DSS/BLF Unit, while the other jack 
will be used for the second DSS/BLF Unit. 
(2) Before connecting the DSS/BLF Unit to the ap- 
propriate Keyset Card, measure the voltage on 
the RED terminal of the modular jack assembly 
with respect to the GREEN terminal. (The “com- 
mon” probe of the voltmeter is placed on the 
GREEN terminal.) It must measure +3OVDC 
(f2.0VDC). If -3OVDC is measured, check the 
cabling for a reversed pair. 
CAUTION 
If the power pair (W/BL, BL/W) is reversed, in- 
stalling a DSWBLF Unit will open the fuse (or as- 
sociated thermistor) on the KSC-D. If the card has 
a fuse, this affects operation of all keyseta, DSS/ 
BLF Units, and Attendant Computer Consoles 
connected to that card. 
(3) Mount the appropriatemodular jack assembly on 
the wall. (4) Remove the four screws on the bottom of the 
DSS/BLF Unit and remove the bottom cover. 
(!I) Locate the strap (J2) in the lower-right comer of 
the control board (see Figure 3-75 on page 
3-137). 
(6) If the unit will be using the programmed key 
arrangement for LXWBLF 1, place the strap in 
the DSSl position (over the right two pins). If the 
unit will be using the programmed key arrange- 
menf for DSS/BLF 2, place the strap in the DSS2 
position (over the left two pins). 
NOTE: Tandem units should have one unit set 
for DSSl and one unit set for DSSZ. If tandem 
units have the same strap settings, there will be 
erroneous indications on the DSS/BLF Units and 
the keyset, and there may be errors throughout 
the system. 
(7) Perform the DSS/BLF Unit self-test: 
a. Plug one end of the line cord into the modular 
jack on the unit’s control board. 
b. While holding down keys 100 and 110 (de- 
fault), plug the other end of the line cord into 
the appropriate modular jack assembly. All 
the keys should light up. If an LED does not 
light, remove and replace the line cord while 
holding down keys 100 and 110 (default). If 
the test fails again, replace the DSWBLF 
unit. 
c. Press each key individually (in any order) to 
remove the lit status. When finished, all keys 
should be unlit. Ifan LED does not go out, re- 
move and replace the line cord and repeat 
steps a and b. If the test fails again, replace 
the DSS/BLF Unit. After all the keys have 
been tested, it takes approximately 10 sec- 
onds for the DSWBLF Unit to return to nor- 
mal operation. 
d. Reassemble the DSWBLF Unit. 
G. AlTENDANT COMPUTER CONSOLE 
INSTALLATION 
7.56 For complete information on the Attendant Com- 
puter Console, along with detailed installation and pro- 
gramming instructions, refer to the manual included 
with the console. 
Page 3-136