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-...

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:...

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...

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...

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:...

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...

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...

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