Inter-Tel GMX-48 INSTALLATION & MAINTENANCE Manual

							INSTALLATION 
INTER-TEL PRACTICES 
Issue 2, May 1990 GMX-48 INSTALLATION & MAINTENANCE 
FIGURE 3-10. C.O. LINE TERMINATIONS FROM RJ-TYPE JACKS 
TO 
CENTRAL 
OFFICE RJ-TYPE JACK 
(2 C.O. LINES PER JACK) 
I I 000 000 ZIMER-EL 
KSU /’ 
., 
MVU- I V-MVU / LINE CORD  TWO-PAIR CABLE / 
FOUR-CONDUCTOR 
MODULAR JACK ASSEMBLY -I \-_ lvlvu- I “-Nlwl LINE CORD 
FIGURE 3-11. MODULAR JACK ASSEMBLY WIRING FOR C.O. LINES 
W/BL 
BL/w 
TIP 1 
TIP2 
I 
RING 1 
RING 2 
I 
Page 3-22  
						

							‘. 
INTER-TEL PRACTICES 
GMX-48 INSTALLATION & MAINTENANCE INSTALLATION 
Issue 2, May 1990 
C. C.O. LINES TERMINATED ON AN RJ-TYPE 
BLOCK 
5.5 Before using this procedure, read the 
IMPOR- 
TRNT NOTES on 
page 3-21. Also, refer to Figure 
3-12 below for a diagram of the complete layout. 
(1) Mount a C.O. block @Ml-50-type connecting 
block) on the MDF backboard. 
(2) For every two C.O. lines, mount a four-con- 
ductor modular jack assembly on the MDF 
backboard near the KSU. The modular jack as- 
semblies should be positioned between the 
C.O. block (mounted in step 1) and the KSU. 
(3) For each modular jack assembly (mounted in 
step 2), connect two-pair cable (or cross-con- 
nect cable) from it to the C.O. block as follows: 
a. Terminate one end of a two-pair cable on 
each modular jack assembly. Refer to Fig- 
ure 3-11 on the previous page. 
b. Terminate the other end of the two-pair 
cable on the right side of the C.O. block, with C.O. line 1 tip and ring first, then CO. 
line 2 tip and ring, and so on. 
. 
(4) Plug one end of a two-pair mod-to-mod line 
cord into each modular jack assembly 
(mounted in step 2). The other end will later be 
plugged into a CO. jack on the KSU. 
(5) To interface between the C.O. block and the 
telephone company RJ-type block: 
a. 
b. 
C. 
d. Run a 25pair cable between the C.O. block 
and the RJ-type block. 
Terminate the MDF end of the 25pair 
cable on the left side of the C.O. block. In- 
stall bridging clips to complete the connec- 
tions. 
On the other end of the 25-pair cable, at- 
tach a 50-pin male amphenol-type connec- 
tor. 
Plug the male connector into the female 
connector on the RJ-type block. 
FIGURE 3-12. CO. LINE TERMINATIONS FROM AN R.&TYPE BLOCK 
KSU -/ 
RJ-TYPE C.O. 
BLOCK SLOCK 
25.PAIR CABLE ASSEMBLY 
Page 3-23  
						

							INSTALLATION 
Issue 2, May 1990 INTER-TEL PRACTICES 
GMX-48 INSTALLATION & MAINTENANCE 
6. KEY SERVICE UNIT (KSU) 
INSTALLATION 
A. UNPACK THE EQUIPMENT 
6.1 
Unpack and inspect the KSU equipment follow- 
ing these guidelines. 
(1) Check the KSU components against the pack- 
ing slip and inspect them for damage. If any 
equipment is missing or damaged, contact 
your 
supplier immediately. 
(2) Check the KSU Control Board (KCB), Expan- 
sion Modules (EXPs), and Accessory Port 
Modules (APMs) as follows: 
NOTE: The KCB, EXPs, and APMs contain 
static-sensitive components. They should be 
handled by the edges only. (For additional pre- 
cautionary information, see the CAUTION on 
page 3-29.) 
a. Check each unit to ensure there is no ship- 
ping foam or tape attached. 
b. Inspect each unit for shorted components. 
c. Return all units to 
their protective bags un- 
til they are ready to be installed. 
CAUTION 
To prevent damage, the KSU Control Board, 
Expansion Modules, and Accessory Port Mod- 
ules must always be transported or shipped as 
individually packaged units. Do 
not transport or 
ship an assembled KSU; such action will void the 
warranty. Also, 
while the KSU Control Board 
is out of service, make sure that the database 
back-up battery strap (JMP 1) is in the B posi- 
tion (upper two pins) to preserve the battery 
charge. 
B. INSTALL THE KSU AND POWER SUPPLY 
6.2 The 
KSU and the power supply are mounted on 
the MDF backboard as outlined in the following 
steps. For a drawing of a suggested layout, refer to 
Figure 3-13 on the next page. 
NOTE: To also install the battery back-up unit (part 
no. 662.0110) designed specifically for use with this 
system, refer to the installation instructions included 
with the unit. 
0) 
(2) 
(3) 
(4) 
(5) 
(6) 
(7) 
(8) 
(9) The distance between the two mounting holes 
on the back of the KSU is 1% inches (27 centi- 
meters). Use this measurement to mark the lo- 
cation of the mounting screw holes on the 
MDF backboard. 
Drive a %-inch #12 pan head screw into the 
center of each KSU mounting hole marking, 
allowing the heads of the screws to protrude 
slightly. 
Hang the KSU on its screws. If necessary, ad- 
just the screws to ensure that the KSU is held 
firmly in place. 
To further secure the KSU to the MDF back- 
board, drive a %-inch #lO pan head screw into 
the hole on the metal tab that extends out the 
bottom of the KSU. 
Position the power supply at least 4 inches to 
one side of the location where the KSU will be 
mounted. (There must be sufficient aircircula- 
tion around both units. DO 
NOT place the 
power supply below the KSU.) 
Mark the positions of the mounting screw 
holes. Set the power supply aside. 
Drive a screw into the center of each power 
supply mounting hole marking, allowing the 
heads of the screws to protrude slightly. (Use 
screws of sufficient strength to support the 
power supply. Some power supplies have 
mounting screw specifications on the label.) 
Hang the power supply on its screws. If neces- 
sary, adjust the screws to ensure that the pow- 
er supply is held securely in place. 
DO NOT plug in the DC power cable or the 
AC power cord until the power supply electri- 
cal test has been performed (as outlined on 
page 3-27). 
Page 3-24  
						

							INTER-TEL PRACTICES 
GMX-48 INSTALLATION & MAINTENANCE INSTALLATION 
Issue 2, May 1990 
FIGURE 3-13. 
KSU AND POWER SUPPLY LAYOUT 
- POWER SUPPLY 
 AC POWER CABLE 
 - DC POWER CABLE 
Page 3-25  
						

							INSTALLATION 
Issue 2, May 1990 INTER-TEL PRACTICES 
GMX-48 INSTALLATION & MAINTENANCE 
Grounding Requirements 
a. 
6.3 The KSU must be properly grounded to an earth 
ground point. A copper, cold water pipe is usually a 
good ground point; however, a properly installed 
ground rod is more effective. b. The ground lug on the bottom of the KSU. 
C. 
NOTE: According to UL 1459, “an insulated ground- 
ing conductor that is not smaller in size and equiva- 
lent in insulation material and thickness to the 
grounded and ungrounded branch-circuit supply con- 
ductors, except that it is green with or without one or 
more yellow stripes, is to be installed as part of the 
circuit that supplies the product or system.” Also, 
“the attachment-plug receptacles in the vicinity of 
the product or system are all to be of a grounding 
type, and the grounding conductors serving these 
receptacles are to be connected to earth ground at the 
service equipment.” d. Battery compartments, if used. 
6.6 If AC power-related problems appear on the 
system, one of the following three methods can be 
used to test the ground. - 
Use a digital multimeter to measure the differ- 
ence of potential between the KSU ground point 
and the power neutral, and between the KSU 
ground point and the third wire ground. If the 
voltage measurement exceeds O.sV; noise may de- 
velop on the system. If this occurs, call an electri- 
Ch 6.4 The grounding wire should be 1OAWG or larger 
and should not exceed 25 feet (7.5 meters) to help 
provide RFI/EMI protection or 10 feet (3 meters) to 
help provide RFI/EMI and lightning protection. Use a Megger to test the ground point. (A Megger 
should be available through the local power com- 
pany.) The reading should be 5 ohms or less. 
6.5 To ground the system (see Figure 3-14 below): 
(1) Ensure that the power supply is not plugged 
into the AC outlet. 
(2) Mount a grounding terminal on the MDF 
backboard and connect it to: Unplug the AC power cord from the outlet and in- 
sert a ground isolation plug into the outlet. Plug 
the AC power cord into the ground isolation plug. 
If the problem ceases, call an electrician. When 
finished, remove the ground isolation plug to re- 
store ground protection.  An earth ground. 
Each HVRA power supply, if used. 
FIGURE 3-14. KSU GROUNDING 
GROUNDING TERMINAL 
bQ4 
TO HVRA POWER 
SUPPLY 
- 
EARTH GROUND 
Page 3-26  
						

							INTER-TEL PRACTICES 
INSTALLATION 
GMX-48 INSTALLATION & MAINTENANCE 
Issue 2, May 1990 
Voltage Surge/Spike Protection 
4.7 
To reduce the effects of AC voltage surges and 
spikes that may cause system malfunctions, false log- 
ic, and/or damage to the electronic components, it is 
recommended that a surge/spike protector be in- 
stalled. Check the manufacturer’s specifications to 
ensure that the device meets the following require- 
ments: 
0 Clamp voltage transients at 300VDC within 5 
nanoseconds when exposed to waveforms as de- 
scribed in the ANSI/IEEE Standard C62.41-1980 
(IEEE 587). 
Reduce RFI/EMI noise by at least 20dB at fre- 
quencies between 5kHz and 30MHz. 
Power Supply Electrical Test 
6.8 Perform the following electrical check on the 
power supply. 
(1) Ensure that the power supply DC power cable 
is not connected to the KSU, the AC power 
cord is not plugged in, and the AC POWER 
switch on the power supply is OFF. 
(2) Plug the AC power cord into a 105-125VAC, 
57-63Hz, 15A, single-phase commercial pow- 
er source. 
NOTE: This MUST be an isolated, dedicated 
circuit. 
DO NOT use an extension cord when (3) 
(4) 
(5) 
(6) installing the power supply and do not plug any 
other equipment into the same AC outlet. 
Ibm ON the AC POWER switch. 
Referring to Figure 3-15 on the next page, 
measure the indicated voltages on the front 
side of the power supply DC power cable con- 
nector. A digital voltmeter of ~0.5% accuracy 
is required. If voltage measurements are not 
within the specified limits (excepting the note 
below), 
DO NOT PROCEED; contact Inter- 
Tel Customer Support. 
NOTE: Since there is no “load” on the power 
supply when performing this test, the actual 
voltage measurements may be lower than the 
tolerances provided in Figure 3-15. If this is 
the case, continue with the installation and 
check the voltages again (using the test points 
provided on the KSU Control Board) after 
keysets have been installed. For the two larger 
power supplies, at least four keysets must be 
installed to provide an adequate testing load. 
For the smallest power supply, at least two 
keysets must be installed to provide an ade- 
quate testing load. 
If the voltages are within the specified limits 
(or perhaps lower as explained in the note 
above), turn OFF the AC POWER switch. 
Connect the power supply DC power cable to 
the power supply connector on the bottom of 
the KSU. 
Page 3-27  
						

							INSTALLATION INTER-TEL PRACTICES 
Issue 2, May 1990 GMX-48 INSTALLATION & MAINTENANCE 
FIGURE 3-15. DC POWER CABLE CONNECTOR PINOUT AND 
VOLTAGE TEST POINT LOCATIONS 
FRONT VIEW 
(LOOKING INTO CONNECTOR PINS 
ON THE END OF THE CABLE) 
&lZVDC RETURN + 3oVDC RETURN 
(GROUND) + 3ovDc 
(GROUND] -1PVDc 
TPl TO TP2 + 30 &2.0VDC (+ 28VDC TO + 32VDC) 
TP3 TO TP5 + 12.5 +O.GVDC (+ 1 i.OVDC TO + 13.1VDC) 
TP4 TO TP5 -12 +l.SVDC (-10.8VDC TO -13.2VDC) 
TP6 TO TP7 + 5.1 iyO.lVDC (+ 5.OVDC TO + 5.2VDC) 
. 
NOTE: Without a sufficient “load” on the power supply, the actual voltage measurements may 
fall outside the range of tolerances provided above. If the voltage measurements are high, 
DO 
NOTPROCEED; 
contact Inter-Tel Customer Support. If the voltage measurements are low, con- 
tinue with the installation and check the voltages again (using the test points provided on the KSU 
Control Board) after station instruments have been installed. For the two larger power supplies, 
at least four keysets must be installed to provide an adequate testing load. For the smallest power 
supply, at least two keysets must be installed to provide an adequate testing load. 
Page 
3-28  
						

							INTER-TEL PRACTICES INSTALLATION 
GMX-48 INSTALLATION & MAINTENANCE Issue 2, May 1990 
C. ‘KSU CONTROL BOARD CONFIGURATION 
6.9 
Before installing any Expansion Modules 
(EXPs) or Accessory Port Modules (APMs), perform 
the following operations to the KSU Control Board 
(KCB). Refer to Figure 3-16 on page 3-31 for a draw- 
ing of the KCB and its attached Memory (MEM) 
Board. 
CAUTION 
The 
modules and components are static sensi- 
tive. Handle these units by the edges only and 
keep replacement components in their protec- 
tive case until they are to be installed. Do not 
bend or touch the pins of the components or 
subject them to a static charge. When working 
with the units, use an anti-static wrist strap and 
place the units on an anti-static work surface. 
Any static charge (no matter how small the 
charge) must be discharged from the body be- 
fore touching the modules or components. 
The 
warranty for this equipment doesnot cover damage 
caused by static or mishandling. Modules or com- 
ponents damaged in such a manner will not be re- 
placed. 
(1) To expose the KCB and its attached MEM 
Board, remove the screws to the two plates 
covering the front of the KSU and set the 
plates aside. (When removing the plates, be 
careful not to bend the pins that hold the tops 
of the cover plates in place.) 
(2) The MEM Board is shipped with the KF-rated 
Basic or the MF-rated Intermediate or Ad- 
vanced 
software already installed. Check the 
part numbers on the labels of the software 
components - ROMs l-4 (or 5) and U30. 
They should all have the same part number. 
NOTE: To install APMs, an Extended MEM 
Board with 
Advanced software (part no. 
662.2101) or an Extended MEM Board withIn- 
termediate software (part no. 662.2103) is re- 
quired. 
(3) Check that all components and integrated cir- 
cuits are seated securely in their sockets and 
that no pins are bent. Also, make sure that all 
(4) 
(5) 
(6) 
(7) 
connectors and stand-offs are properly aligned 
and seated. 
NOTE: If the components on the MEM Board 
are not properly seated and/or if the MEM 
Board itself is not properly seated, the RUN 
LED may flash when the KSU is turned on and 
the KSU will not operate properly. 
If connecting an external music source, place 
the music-on-hold (MOH) ON/OFF strap in 
the ON position (over the left two pins) to en- 
able music, or place the strap in the OFF posi- 
tion (right two pins) to disable music. If 
enabled, outside callers will hear music when 
placed on hold. If disabled, outside callers will 
not hear music when placed on hold. 
. 
NOTE: Kf a music source is connected, the po- 
sition of the MOH strap will not affect theabil- 
ity of keyset users to receive background 
music. Also, regardless of the strap location, 
internal station users will hear, music when 
placed on hold by another station or when 
camped on. 
If music-on-hold is enabled, set the MOH HI/ 
LO strap in the desired position. For a lower 
MOH volume level, set the strap in the LO po- 
sition (over the left two pins). For a higher 
MOH volume level, set the strap in the HI po- 
sition (over the right two pins). 
Place the back-up battery (JMP 1) strap in the 
A position (over the bottom two pins) to en- 
able database back-up battery. If the strap is 
placed in the B position (upper two pins), the 
BAm OFF LED lights when the AC power is 
on. 
NOTE: The BAIT OFF LED will not light if 
the strap is missing. 
If attaching an SMDR/SAR output device or a 
programming terminal, set the RS-232-C baud 
rate DIP switches to the desired baud rate. 
NOTE: Only one switch should be ON (in the 
down position) at a’ time. The other three 
switches must be off. Having all the switches 
off or having more than one switch on at a time 
will cause data errors to occur and stations may 
not operate. 
Page 3-29  
						

							INSTALLATION 
Issue 2, May 1990 INTER-TEL PRACTICES 
GMX-48 INSTALLATION & MAINTENANCE 
(8) Check the station fuse on the bottom edge of 
the KSU Control Board. This should be a 2A, 
25OV, AGC 2 (fast-acting) fuse. 
(9) If any of the odd-numbered station circuits are 
installed with secondary voice paths (refer to 
page 3-14), set the associated secondary voice 
path strap on the KSU Control Board in the 
OHVA position (over pins A and B). If the cir- 
cuit does not have a secondary voice path, en- 
sure that the strap is in the NORM position 
(over pins B and C). 
(10) ‘Ihm ON the AC POWER switch and observe 
the LEDs on the front of the KSU for the fol- 
lowing indications. If they are incorrect, check 
the system voltages as outlined in step 11 and 
then contact Inter-Tel Customer Support. 
NAME 
CORRECT INDICATION 
RUN 
Lit (Green) 
CO BUSY Off (Red) 
IC BUSY Off (Red) 
MINOR ALARM Off’ (Red) 
D-BASE ERROR Off* (Red) 
BA?T OFF 
Off (Red) 
*When a new system is installed, the D-BASE 
ERROR LED remains lit until the system da- 
tabase has been initialized or programmed. 
The MINOR ALARM LED may also be lit 
and can later be cleared from an attendant sta- 
tion using the Clear System Alarm feature 
code (019). 
(11) Measure the following system voltages. Adigi- 
tal voltmeter of ~0.5% accuracy is required. 
Place the “common” voltmeter probe on the 
ground point (TPO) and place the other probe 
on the desired voltage test point. (Refer to Fig- 
ure 3-16 on the next page for system voltage 
test point locations.) 
JEST POINTS 
YOLTAGE 
n1toTPo 
+ 5.1 ~O.lVDC 
TP2toTPo 
-12.0 jg.2VDc 
TP3toTPo + 30.0 &2.0VDC 
TP4toTPo + 12.5 &0.6VDC 
NOTE: Without any keysets installed, the ac- 
tual voltage measurements may be lower than 
the tolerances provided above. If this is the 
case, continue with the installation and check 
(12) 
03) 
(14) 
(15) 
(16) 
the voltages again after station instruments 
have been installed. For the two larger power .j 
supplies, at least four keysets must be installed 
to provide an adequate testing load. For the 
smallest power supply, at least two keysets 
- must be installed to provide an adequate test- 
ing load. 
If the voltages are within tolerance (or perhaps 
lower as explained in the preceding note), pro- 
ceed to step 13. If the voltages are out of toler- 
ance: 
a. Turn OFF the AC POWER switch. 
b. Check the KCB and its attached MEM 
Board for shorted components. 
c. mm ON the AC POWER switch and 
check the voltages again. 
d. If still out of tolerance, turn OFF the AC 
POWER switch and contact Inter-Tel Cus- 
tomer Support for assistance. 
While pressing the battery check button (SWl) 
on the MEM Board, measure the database 
back-up battery voltage. Place the “common” 
voltmeter probe on battery test point TPl (-) 
and the other probe on battery test point TP2 
(+ ). If the voltage is not greater than 2SVDC, 
return the KSU for repair. (Refer to Figure 
3-16 on the next page for back-up battery volt- 
age test point locations.) 
NOTE:This procedure may be performed with 
the KSU power on or off. 
Thm OFF the AC POWER switch. 
An optional SMDR/SAR output device, apro- 
gramming terminal, or an auto-answer modem 
may be connected to the RS-232-C port at any 
time. Refer to page 2-16 for RS-232-C pin con- 
nections, and refer to page 3-48 for installa- 
tion instructions. 
If any EXPs or APMs are to be installed, proceed 
with the instructions on page 3-32. 
If no EXPs or APMs are to be installed, proceed 
to page 3-37. 
Page 3-30  
						

							INTER-TEL PRACTICES 
GMX-48 INSTALLATION & MAINTENANCE INSTALLATION 
FIGURE 3-16. 
KSU CONTROL BOARD (KCB) 
RS-232-C 
/----BAUD RATE 
LED INDICATORS- 
BATTERY  
CHECK 
BUTTON - 
BACK-UP 
BATTERY 
STRAP -  
BATTERY 
VOLTAGE  
TEST POINTS 
-4 
BACK-UP 
BATTERY - / 
MEM BOARD 1 
SYSTEM VOLTAGE 
TEST POINTS 
MOH STRAPS--., DIP SWITCHES 
STATION SECONDARY ’ 
VOICE PATH 
STRAPS 
STAND-OFF 
- FUSE 
RS-232-C CONNECTOR 
RESET SWITCH -’ L-GROUND LUG 
Page 3-31