Inter-Tel GMX-48 INSTALLATION & MAINTENANCE Manual

							INSTALLATION 
Issue 2, May 1990 ‘. 
INTER-TEL PRACTICES 
GMX-48 INSTALLATION & MAINTENANCE 
1. INTRODUCTION 
1.1 This section describes the recommended proce- 
dures for installing the system hardware. Refer to 
SPECIFICATaONS for hardware descriptions. 
2. SYSTEM INSTALLATION OUTLINE 
2.1 System installation is performed in the follow- 
ing order. Detailed instructions and figures for each 
step are located throughout the INSTALLATION 
section. 
(1) 
(2) 
(3) 
(4) 
(5) 
(6) 
(7) 
Plan the installation, including the Key Ser- 
vice Unit (KSU) and main distribution frame 
(MDF) location, station locations, cable runs, 
and optional equipment. 
Run cables to the keysets, Direct Station 
Selection/Busy Lamp Field (DSS/BLF) Units, 
single-line sets, and playback devices. Run wir- 
ing to any optional equipment, such as the ex- 
ternal paging network, external music source, 
etc. 
Terminate the station cables on modular jack 
assemblies at the station locations. 
Mount the MDF backboard, assemble the sta- 
tion blocks on the backboard, and connect the 
station cables to the corresponding station 
blocks. 
Perform the station loop resistance test for 
each station cable. 
If necessary, terminate the C.O. lines on mod- 
ular jack assemblies at the MDE 
Mount the KSU and power supply on the 
MDF backboard. (8) Ground the KSU and perform the power sup- 
ply electrical test. 
(9) Install any Expansion Modules (EXPs) and/or 
Accessory Port Modules (APMs), if used. 
(10) Connect the KSU to the cables and line cords 
that run from the MDF. 
(11) Install the station instruments and any option- 
al station equipment, such as headsets, hand- 
set amplifiers, and Data Port Modules. 
(12) Install any optional system equipment, such as 
output device(s) for station message detail re- ’ 
cording (SMDR) and system activity report 
(SAR), external music source, external paging 
network, voice mail, etc. 
(13) Ensure that all equipment is working properly. 
(14) Refer to the PROGRAMMING section of this 
manual to initialize and program the system. 
NOTICE 
This GMX-48 Installation and Field Maintenance 
Manual 
instructs field technicians on the proper 
installation practices for the GMX-48 System. 
This manual does 
not provide step-by-step in- 
structions for premises wiring practices as dic- 
tated by the National Electrical Code, which 
includes, but is not limited to, cable layouts, cable 
installation, AC power installation, proper AC 
grounding, eliminating or preventing external in- 
terference (including, but not limited to, RFI, 
EMI, lightning, AC power disturbances, static dis- 
charge), and other telephony practices standard 
within the industry. Cable installers, electricians, 
and field technicians are expected to be properly 
trained and, if applicable, licensed in their trade 
practices. 
Page 
3-2  
						

							INTER-TEL PRACTICES 
GMX-48 INSTALLATION & MAINTENANCE INSTALLATION 
Issue 2, May 1990 
3. PRE-INSTALLATION CHECKLIST 
3.1 To make installation easier, use the checklist on 
the following pages when preparing to install the sys- 
tem. (Hardware specifications are included in the 
SPECIFICATIONS section.) 
A. 
- 
- 
- 
- 
ESTABLISH SUITABLE ENVIRONMENTAL 
CONDITIONS FOR THE SYSTEM 
Place the KSU within 5 feet (1.5 meters) of an iso- 
lated, dedicated, 105-125VAC, 57-63Hz, 15A, 
single-phase commercial power source. 
NOTE: This must be an isolated, dedicated AC cir- 
cuit for proper operation. All three wires (power, 
neutral, and ground) must be run separately from 
the outlet to the breaker panel without being 
bonded to any other wire or circuit. 
DO NOTplug 
any other equipment into this outlet. To maintain 
the protection provided by the isolated, dedicated 
circuit, the length of the AC power cord limits the 
distance between the power supply and the outlet; 
DO NOT use an extension cord. Also, to protect 
the system from AC voltage surges, a surge/spike 
protector is recommended (refer to page 
2-6 for specifications). 
Select the KSU location to minimize cable run 
length. Station instruments connected to the sys- 
tem must not exceed the limits (using 24AWG 
wire) listed in the table on page 3-17. The ohm 
values are loop measurements; feet (meter) val- 
ues are the maximum one-way measurements 
from the KSU. 
The KSU location should not be exposed to direct 
sunlight, high humidity, heat, dust, or strong mag- 
netic fields (such as those generated by heavy mo- 
tors and large copy machines). 
The MDF requires a 4 x 6-foot (1.2 x 1.8-meter), 
%-inch plywood backboard. This should provide 
sufficient room for the KSU and power supply, 
plus all blocks, modular jack assemblies, and 
peripheral equipment. For off-premises stations, 
allow additional room for HVRA blocks, 48VDC 
power supplies, and ring generators. 
For cooling purposes, ample air space (at least 
four inches on the top, bottom, and left and right 
- 
- 
sides) should be provided for both the KSU and 
the power supply. They should be mounted on the 
wall at least four inches apart (with the power sup- 
ply off to the side of the KSU). 
Neverplace thepow- 
er supply below the KSU, and 
never place anything on 
top of the KSU or 
the power supply. _ 
The cable(s) between the SMDRBAR output de- 
vice(s) and the KSU must not be longer than 50 
feet (15 meters). 
The equipment should be located in a climate- 
controlled room with the following environmen- 
tal conditions: 
RKXJIREMENTS JN STORAGE  Ibl OPFRATION 
Temperature - 32” to 104” F -40’ to 185” F 
KSU 00 to 40” c 
-40’ to 85” C 
Temperature - 32’ to 113’ F -40” to 185O F 
Station Instruments 0” lo 45” c -40° to 85” C 
Relative Humidity 5% to 95% 
5% to 95% 
(Non-Condensing) 
Altitude 
up to 10,000 ft. *up tQ 4p,ooo ft. 
(3,048 m.) (12,192 m.) 
NOTE: It is recommended that the maximum op- 
erating temperatures (as stated above) 
never be 
exceeded. Therefore, when installing the KSU 
and station instruments, allow a sufficient margin 
for error in case of air conditioning failure, rou- 
tine maintenance, plant shutdown, etc. As a gen- 
eral rule, if conditions are suitable for office 
personnel, they are also suitable for KSU and sta- 
tion instrument operation. A properly controlled 
environment will help to extend the operating life 
of the equipment. 
From UL 1459, a product safety specification governing 
telephone equipment: 
- 
- 
- 
- 
Page 3-3 Never install telephone wiring during a lightning 
storm. 
Never install telephone jacks in wet locations un- 
less the jack is specifically designed for wet loca- 
tions. 
Never touch uninsulated telephone wires or ter- 
minals unless the telephone line has been discon- 
nected at the network interface. 
Use caution when installing or modifying tele- 
phone lines.  
						

							INSTALLATION 
Issue 2, May 1990 ‘. 
INTER-TEL PRACTICES 
GMX-48 INSTALLATION & MAINTENANCE 
ASSEMBLE THE NECESSARY TOOLS AND 
the MDF, the following tools and supplies are also 
SUPPLIES needed. 
Industry-standard, three-pair (six-conductor) 
cable to run from the MDF to keysets, DSS/BLF 
Units, Single-Line Instruments (SLIs), single-line 
DTMF sets, playback devices, etc. (For excep- 
tions, see the NOTE under “Running Cable” on 
page 3-6.) 
For C.O. lines terminated on RJ-type jacks near 
the 
MDF: 
- Two-pair mod-to-mod line cords (one for every 
two C.O. lines installed). 
Six-conductor modular jack assemblies for key- 
sets, DSS/BLF Units, SLIs, single-line DTMF 
sets, playback devices, etc. (For exceptions, see 
the NOTE under “Running Cable” on page 3-6.) 
For C.O. lines terminated on W-type jacks away 
from the MDF (see Figure 3-10 on page 3-22): 
Four-conductor modular jack assemblies (two for 
every two C.O. lines installed). 
A high-impedance digital multimeter to check the 
power supply and ensure correct wiring of the 
modular jack assemblies. Multimeter accuracy 
must be f-OS% or better. 
Standard terminal blocks (66Ml-50 type) and 
bridging clips for terminating the station cables at 
the MDE - 
- 
- 
- 
Two-pair mod-to-mod line cords (two for every 
two C.O. lines installed). 
Industry-standard, two-pair cable (enough to ex- 
tend from each RJ-type jack location to the 
MDF). 
Gas discharge tubes with silicon avalanche sup- 
pressors for lightning protection on the C.O. 
lines. 
Industry-standard, 25-pair cable for connecting 
the MDF station blocks to the station connections 
on the KSU. 
For C.O. lines terminated on an W-type block (see 
Figure 3-12 on page 3-23): 
SO-pin female amphenol-type connectors and a 
connecting machine. One 66Ml-50 type terminal block and a supply of 
bridging clips. 
Voltage surge/spike protector. - 
- 
- 
- 
- 
- 
- 
Industry-standard, 25-pair cable for connecting 
the RJ-type block to the CO. block. 
Grounding terminal and 10AWG wire for ground- 
ing the KSU (and, if off-premises stations are in- 
stalled, the 48VDC power supply). A 50-pin male amphenol-type connector and a 
connecting machine. 
Standard telephone hand tools and the mounting 
hardware for the KSU (two %-inch #12 pan head 
screws and one %-inch t10 pan head screw), power 
supply, MDF backboard, modular jack assemblies, 
etc. Four-conductor modular jack assemblies (one for 
every two CO. lines installed). 
Two-pair mod-to-mod line cords (one for every 
two C.O. lines installed). 
Programming terminal for initializing and cus- 
tomizing the database (refer to page 2-16 for 
specifications). Industry-standard, two-pair cable (enough to ex- 
tend from the CO. block to each modular jack as- 
sembly on the MDF). 
Gas discharge tubes with silicon avalanche sup- 
pressors for lightning protection on the C.O. 
lines.  3.2 Depending on the type of C.O. termination 
used by the telephone company and how close it is to 
Page 
3-4  
						

							INTER-TEL PRACTICES 
GMX-48 INSTALLATION & MAINTENANCE INSTALLATION 
Issue 2, May 1990 
C. PLAN STATION LOCATIONS AND TYPES 
OF STATION INSTRUMENTS 
- 
Prepare a cable identification plan using station 
circuit numbers; do not use intercom numbers 
(see page 3-6 for details). If any 24-line keysets 
are to have secondary voice paths installed, refer 
to the information on pages 3-14 to 3-16. 
_; 
- 
- 
- 
D. ASSEMBLE THE OPTIONAL EQUIPMENT 
- 
Keysets: The GMX-48 System has the capacity for 
up to 48 keysets. Keysets are available in 24-line 
(standard or display) and 1Zline (non-display) 
models. 24-line standard keysets can be converted 
to display keysets by installing optional Liquid 
Crystal Display (LCD) Units (part number 
828.1052). 
DSWBLF 
Units: Up to five DSS/BLF Units can 
be installed on the system. Each unit requires one 
station circuit and its own cabling. If desired, all 
five units can be connected to the KSU Control 
Board (KCB) or to the same Expansion Module 
(EXP). 
Single-Line Sets: Up to 12 single-line sets can be 
installed on the system. Single-line sets can be 
Single-Line Instruments (SLIs) or industry-stan- 
dard, single-line DTMF sets. 
Playback Devices: Playback devices can be used in 
place of single-line sets. They are especially useful 
as hunt group overflow/announcement stations 
and automated attendants. (Refer to page 
2-15 for specifications.) 
Headsets for keyset stations and handset ampli- 
fiers for keyset stations or single-line set stations. 
(Refer to page .2-12 for more information.) 
- 
- 
- 
- 
- 
- 
- 
- 
- 
- 
- Data Port Modules (part number 828.1094) for 
24-line keysets. These are installed on keysets and 
are used for hooking up either modem-equipped 
data terminals or loud ringing adapters and exter- 
nal signalling devices. (Refer to page 2-12 for 
more information.) 
The cable(s) between the SMDR/SAR output de- 
vice(s) and the KSU must not be longer than 50 
feet (15 meters). (See page 2-16 for specifica- 
tions.) 
48VDC power supply, ring generator, and High 
Voltage Ringing Adapter (HVRA) for off-pre- 
mises stations. (See page 3-18 for procedures.) 
OPX repeater(s) for amplifying voice volume 
levels, if necessary. (Refer to page 2-14 for specifi- 
cations.) 
External music source (the cable that connects to 
the KSU must be equipped with an x-inch mini- 
phone plug). 
External paging speakers and an amplifier (the 
cable that connects to the KSU must be equipped 
with an RCA-type phono plug). 
Auto-answer modem for remote system program- 
ming. (Refer to page 2-17 for requirements.) 
Power supply for system battery back-up. (Refer 
to page 2-17 for specifications.) 
Doorbox equipment. (Refer to page 2-18 for re- 
quirements.) 
Voice mail equipment. (Refer to page 2-18 for 
more information.) 
Facsimile (FAX) machine. (Refer to page 
2-18 for more information.) 
Page 3-5  
						

							INSTALLATION 
Issue 2, May 1990 
‘. 
INTER-TEL PRACTICES 
GMX-48 INSTALLATION & MAINTENANCE 
4. STATION CABLING AND 
TERMINATIONS 
4.1 Floor plans should be developed to aid in proper 
station cabling in a star (home run) configuration 
from the KSU. The cables are run from the station 
locations to the station blocks at the MDF. Refer to 
page 2-3 for cabling requirements. 
4.2 Both ends of each cable should be labeled with 
the station’s circuit number. The circuit number 
(X.Y) designates the circuit’s position in relation to 
the KSU (X = l-6) and the circuit’s position on the 
KSU Control Board (Y = l-S), Expansion Module 
(Y = l-S), or Accessory Port Module (Y = l-6). For 
example, station circuit number 4.6 identifies the 
sixth circuit on the third EXP attached to the KSU. 
4.3 When the system is initialized, the intercom 
numbers for the KCB and EXPs are assigned in order 
from circuit 1.1 (intercom number 100) to circuit 6.8 
(intercom number 147). The intercom numbers for 
the APMs are assigned in order from circuit 7.1 (in- 
tercom number 148) to circuit 8.6 (intercom number 
159). The intercom numbers can be changed in data- 
base programming. 
NOTE: No matter what position the APMs are lo- 
cated in relation to the EXPs, the first APM installed 
is always assigned circuits 7.1 to 7.6 and the second 
APM installed is always assigned circuits 8.1 to 8.6. 
4.4 A DSS/BLF Unit requires a station circuit and 
cabling that is separate from the keyset’s circuit and 
cabling. If five station circuits are used for DSS/BLF 
Units, five fewer keysets can be installed. If desired, 
all five DSS/BLF Units can be installed on the KCB 
or on the same EXI? 
4.5 In order to use the off-hook voice announce fea- 
ture and/or the simultaneous voice data feature, 
24-line keysets can be installed with secondary voice 
paths. To accomplish this, the keyset is installed on an 
odd-numbered station circuit (e.g., 1.1, 1.3, 1.5, etc.). 
Then, the primary voice pair from the following even- 
numbered circuit (1.2,1.4,1.6, etc.) is used to create a 
secondary voice path. Therefore, for every secondary 
voice path keyset installed, the following even-num- 
bered circuit cannot have a station instrument in- 
stalled. Refer to pages 3-14 to 3-16 for complete 
secondary voice path installation instructions. 
A. RUNNING CABLE 
NOTE: 
It is recommended that three-pair cable and 
six-conductor modular jacks be used for all station 
connections. This allows the various types of station 
instruments to be easily interchanged, if necessary. 
However, if desired, SLIs, single-line DTMF sets, 
‘and playback devices can be installed using one-pair 
cable and four-conductor modular jacks. 
4.6 From the MDF location, run industry standard, 
three-pair (six-conductor) cable to keysets, DSS/BLF 
Units, single-lines sets, and playback devices follow- 
ing these guidelines: 
Install proper type cable for the application ac- 
cording to the National Electrical Code and local 
building codes. 
Avoid cable runs parallel to fluorescent light fix- 
tures or AC lines not in conduit. If these obstacles 
are unavoidable, run the cables across them at 
right angles. 
Do not run station cables inside electrical conduit 
already occupied by AC power cable. (To do so is a 
violation of the National Electrical Code.) 
Do not run station cables near equipment with 
electric motors or through strong magnetic fields, 
such as those generated by large copy machines, 
arc welding equipment, heavy motors, etc. 
Do not place station cables where they can be 
stepped on or where they can be rolled over by of- 
fice furniture. 
If using multi-pair (e.g., 2%pair) cable runs to 
multiple station locations do not include C.O. 
lines, AC-ringing single-line sets, or AC-ringing 
auxiliary equipment in a cable being used for key- 
sets or DSS/BLF Units. Stations using keyset cir- 
cuits should be included in separate multi-pair 
cable runs. 
Do not exceed the loop limit measurements (us- 
ing 24AWG wire) for the.station cable lengths as 
outlined in the table on page 3-17. The ohm val- 
ues are loop measurements; feet (meter) values 
are the maximum one-way measurements from 
the KSU. 
Page 3-6  
						

							)i .j INTER-TEL PRACTICES 
GMX-48 INSTALLATION & MAINTENANCE INSTALLATION 
Issue 2, May 1990 
B. TERMINATING THE CABLES AT STATION 
LOCATIONS 
4.7 Terminate the keyset, DSS/BLF Unit, single- 
line set, and playback device station cables on six- 
conductor modular jack assemblies at the station 
location. (For exceptions to this, refer to the NOTE 
under “Running Cable” on the previous page.) 
4.8 Do not mount the assemblies on the wall at this 
time; they will be wall mounted later when the station 
instruments are installed. Refer to Figure 3-l below 
for a wiring diagram. 
CAUTION 
If the power pair (W/BL, BLIW) is reversed, in- 
stalling a keyset or DSS/BLF Unit will open the 
fuse on the KSU Control Board or Expansion 
Module. This affects operation of all keysets 
and DSS/BLF Units connected to the board or 
module. If tip and ring (W/BL, BLAV) is re- 
versed for single-line sets, the instrument may 
ring continuously. 
FIGURE 3-l. 
MODULAR JACK ASSEMBLY WIRING 
GIW I 
I WIG I I , I w/o BLIW 
0 
W 
FOR KEYSETS FOR SINGLE-LINE SETS 
AND AND 
DSS/BLF UNITS PLAYBACK DEVICES 
NOTE: The W/BL and BL/W conductors for the two types of stations are reversed. If the type of 
station instrument is changed, the modular jack must be rewired. 
Page 3-7  
						

							INSTALLATIQN 
Issue 2, May 1990 
‘. 
INTER-TEL PRACTICES 
GMX-48 INSTALLATION & MAINTENANCE 
C. TERMINATING STATION CABLES AT THE 
(2) Attach up to six 66Ml-50-type terminal blocks 
MAIN DISTRIBUTION FRAME to the plywood backboard. Refer to Figure 3-2 
below for a sample MDF station block layout 
4.9 The main distribution frame (MDF) is the point 
and cable assignments. Station blocks include: 
at which the KSU, station instruments, C.O. lines, 
and miscellaneous equipment are connected to one 
another. It is extremely important that the connec- 
tions be made carefully and accurately. (Refer to Fig- 
ure 3-2 below for a sample MDF station block layout 
and cable assignments. For diagrams of possible MDF 
C.O. layouts, refer to Figures 3-10 and 3-12.) 0 
8 
4.10 Assemble the MDF: 
(1) Mount a 4 x 6-foot (1.2 x l&meter), %-inch 
plywood backboard at the MDF location. Up to 6 blocks for connectingstation cables 
and the 25pair cables for the KSU Control 
Board, Expansion Module(s), and Acces- 
sory Port Module(s). (KCB and EXP blocks 
for keysets and DSS/BLF Units; APM 
blocks for single-line devices.) 
Optional block(s) for off-premises stations. 
One block is used for each HVRA (two sta- 
tions). The block is also used to connect the 
power supply and ring generator to the off- 
premises station(s). 
’ 
FIGURE 3-2. SAMPLE MDF STATION BLOCK LAYOUT AND CABLE 
ASSIGNMENTS 
POWER 
SUPPLY 
r- 
KEY SERVICE UNIT 
(KSU) 
L 
STN 
- TO 
STN STN 
‘b TO 
STATIONS 
Page 3-8  
						

							INTER-TEL PRACTICES 
INSTALLATION 
GMX-48 INSTALLATION & MAINTENANCE 
Issue 2, May 1990 
4.11 
Each type of station instrument is connected to 
a specific board or module. Keysets and DSS/BLF 
Units are connected to the KSU Control Board 
(KCB) or to Expansion Modules (EXPs). Single-line 
devices (such as single-line sets, playback devices, 
voice mail units, FAX machines, etc.) are connected 
to Accessory Port Modules (APMs). 
4.12 Connect the station cables to the STN blocks 
on the MDF as follows: 
(1) 
(2) 
(3) Ensure that both ends of each station cable are 
labeled with the circuit number of the asso- 
ciated station instrument. 
Terminate each station cable on the 
right side 
of the corresponding STN block. Refer to Fig- 
ures 3-3 through 3-6 on the following pages 
for station cable terminations. 
NOTE: Secondary voice path-equipped key- 
sets can only be installed on odd-numbered 
station circuits. Refer to the installation infor- 
mation on pages 3-14 to 3-16 before terminat- 
ing the station cables on the STN block. 
Using enough 25pair cable to run from each 
STN block to the KSU, make the termination 
cables. Attach a 50-pin female amphenol-type 
connector to one end of each cable. Label each 
connector and cable end with the proper loca- 
(4) 
(5) 
(6) 
(7) tion. (For example, KCB, EXP-1, EXP-2, 
APM-1, etc.) These connectors will .be at- 
tached after the KSU is installed. 
Terminate the other end of each 2%pair cable 
on the left side of the corresponding STN 
block. DO NOT attach bridging clips until the loop 
resistance tests have been performed (as de- 
scribed on page 3-17). 
For APMs that will have off-premises stations in- 
stalled: 
Install an HVRA, power supply, and 
ring generator as described on page 3-18. 
Terminate unused keyset circuits on the MDF 
as shown in Figure 3-6 on page 3-13. Termina- 
tions must be made on the 
lefl side of the block. 
Bridging clips 
must not be used. This procedure 
helps prevent the system from accidentally 
equipping unused keyset circuits. If a keyset 
circuit is terminated, the termination strap 
must be removed prior to future station instal- 
lation on that circuit. 
NOTE: This termination procedure is for un- 
used keyset (KCB or EXP) circuits only. Do no 
terminate unused single-line device @PM) 
circuits. 
Page 3-9  
						

							INSTALLATION INTER-TEL PRACTICES 
Issue 2, May 1990 CMX-48 INSTALLATION & MAINTENANCE 
FIGURE 3-3. STANDARD KCB AND EXP BLOCK TERMINATIONS 
KC6 OR EXP 
+30vcc- 
r, 1.1 1 - - 
GND - 
-- 
o/w PRI MODULAR 
JACK 
KCB 
OR 
EXP 
AMPHENOL- 
TYPE 
CONNECTOR 
- 
ASSEMBLY 
TO KEYSET 
OR DSS/BLF 
UNIT 
MODULAR 
11  jw,opRl 
66Ml do-TYPE 
BLOCK 
(PART OF MDF) 
NOTE: For proper keyset operation, all three pairs (power/ground, primary, and auxiliary) are required. 
Page 3-10  
						

							INTER-TEL PRACTlCES 
GMX-48 INSTALLATION & MAINTENANCE INSTALLATION 
Issue 2, May 1990 
FIGURE 3-4. APM BLOCK TERMINATIONS 
APM APM MODULAR 
11 1.1 n _ _ _n 1.1 7 TIP - W/BL TIP JALK 
LINE DEVICE 
1.2 1.2 
BL/W RING 
w/o 
W/G 
MODULAR 
W/BL TIP JACK 
TO SINGLE- 
LINE DEVICE 
AMPHENOL- 
TYPE 
CONNECTOR 66Ml-50-TYPE 
BLOCK 
(PART OF MDF) 
RESERVED FOR 
FUTURE USE 
Page 3-11