Inter-Tel Imx/Gmx 256 Installation And Field Maintenance Manual

							INTEB-TELPBACTICESIMX/GMX 256 INS~TION & MAINTENANCEINSTALLATION
Issue 1, November 1994
4.7Since the IMX 256 System utilizes digital voice
and data transmission between the digital keysets and
the equipment cabinet, there are some additional digital
keyset-only cabling requirements:l Do not use shielded cable, and do not use cable
smaller than 24AWG.l
Do not parallel cables (i.e., do not “double up on the
COppX”).
0Do not “bridge” or “Y” off the cable to another loca-
tion.l Unlike analog 
keysets, the digital keysets do not
need to be routed in separate multi-pair cable runs.
For example, if using 
25pair cable runs to multiple
station locations, it is acceptable to include 
single-
line sets, auxiliary equipment, and trunks in a cable
being used for digital 
keysets.
B.TEBMINATING THE CABLES AT
S’l%I’ION LOCATIONS
Digital 
Keys&
4.8Terminate the digital keyset station cables on four-
or six-conductor modular jack assemblies at the station
lOC&iOIlS.
4.9Do 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.
CAUTIONIf the tip and ring is reversed when installing a
digital keyset, the keyset will not function.
FIGURE 3-l.
DIGITAL KEYSET MODULAR JACK ASSEMBLY WIRING
RING
I
FOR DIGITAL KEYSETS
USING FOUR-CONDUCTOR JACKSRING
I
TIP
FOR DIGITAL KEYSETS
USING SIX-CONDUCTOR JACKS
Page 3-7 
						

							IlWTALUTIONIssue 1, November 1994INTER-TELlPRACTICESlMX/GMX 256 INSTALLATION & MAINTENANCE
Analog Station Instruments
4.10Terminate the analog 
keyset, analog DSS/BLF
Unit, Attendant Computer Console, single-line set, and
playback device station cables on six-conductor modu-
lar jack assemblies at the station locations. (For excep-
tions to this, refer to the NOTE following section A on
the previous page.)
4.I.lDo 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 3-2 below for
a wiring diagram.CAUTION
If the power pair (W/BL, BL/W) is reversed, in-stalling a 
keyset, Attendant Computer Console,
or DSS/BLF Unit will open the fuse or associated
thermistor on the 
Keyset Card. If the card has a
fuse, this affects operation of all station instru-
ments connected to that card. If tip and ring 
(W/
BL, 
BL/W) is reversed for DC-ringing single-line
sets, the instrument may ring continuously.
FIGURE 3-2.ANALOG SlATION MODULAR JACK ASSEMBLY WIRING
I
WlBLI
w/oWIG
BLMfWI0
WIGFOR ANALOG 
KEYSETS,
FOR SINGLE-LINE SETS
ATTENDANT COMPUTER CONSOLES,AND
AND ANALOG 
DSS/BLF UNITSPLAYBACK 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-g 
						

							INTER-TELPRACTIcEsIMX/GMX 256 INSTALLATION & MAINTENANCEINSTALLATIONIssue 1. November 1994
5.ASSEMBLING THE MAIN
DISTRIBUTION 
FRAME (MDF’)
BACKBOARD
5.1The main distribution frame (IUDF) is the point at
which the station instruments, trunks, and auxiliary sys-
tem equipment are connected to terminal blocks (or, in
the case of 
Tl spans and optional Tl equipment, modu-lar jack assemblies are used instead). These terminal
blocks (or modular jacks) are then connected to the 256
System. It is extremely important that the connections
be made 
careffilly and accurately.
NOTE: To simplify the MDF installation instructions,
this manual outlines basic one block to one card installa-
tion using bridging clips. However, it is quite accept-able, and in some situations more 
functional, to use
additional blocks and then moss connect between them.
5.2Assemble the MDF as follows:
(1)Mount at least a 4 
x 8-foot (1.2 x 2.4meter),g-inch plywood backboard at the MDF loca-
tion. (Depending on the number of stations and
trunks to 
lx installed, a larger backboard may be
necessary.)
(2)Attach the 66Ml-Xl-type terminal blocks to the
plywood backboard. Refer to Figure 3-3 on the
next page for a sample MDF block layout and
cable assignments. Blocks include:l
Up to 15 blocks for connecting CO trunks and
the 
25pair cables for the Loop/Ground StartCards 
(LGCs) and/or the Loop Start Cards
(Lscs)-
Up to 15 blocks for connecting DID trunks
and the 
25pair cables for the Inward Dialing
~~0.
Up to 16 blocks for connecting station cables
and the 
25pair cables for the station cards -Digital 
Keyset Cards (DKSCs) for digital
keysets; Keyset Cards (KSCs or KSC-Ds) for
analog 
keysets, analog DSWBLF Units, and
Attendant Computer Consoles; Single-LineCards 
(SLCs) for single-line sets and play-
back devices; and Inward Dialing Cards
(ID&) for off-premises extensions and/or
on-premises single-line sets and playback
devices.
NOTE: If, as recommended, three-pair cable
is used for wiring single-line sets and play-
back devices, extra terminal blocks and the
use of cross-connect wiring techniques are
required.One block for connecting the RCPU Card
cable and cables for music sources, paging
equipment relay control, power failure trans-fer equipment, night transfer equipment,
general signaling devices, etc.
(3)If any Tl spans or any optional Tl alarm signal-
ing devices are to be installed, attach eight-con-
ductor modular jack assemblies to the MDF as
required. (For complete information on install-
ing 
Tl spans, refer to page 3-17.)
Page 3-9 
						

							lN!3TALLATIONIssue 1, November 1994INTER-TELPRACTICESIMX/GMX 256 INS-TION & MAINTENANCE
FIGURE 3-3.SAMPLE MDF BLOCK LAYOUT AND CABLE ASSIGNMENTS->*.z-1ITO CENTRAL
OFFICE
+ TO STATIONS LGC OR LSC
CO TRUNKSl-8 -
1
SLCSLC-
i
fEL
:
-tKSC
21
nl28
-
-13.1
I3.lC-LGC OR LSC
CO TRUNKS
9-16SLC
14.1
IIt14.16EMC
E&M TRUNKS
1-4
KSC
3.1I
3.8
SLC
m
7.1
K7.8i
6.1
ol8.8
-
-
-11.1
ll.lE-
DCDID TRUNKS
l-8KSCRCPU CARDTO EXTERNAL
EQUIPMENT
CABLESbTO 256
Page 3-10 
						

							INTER-TELPRACTICESIMX/GMX 256 INSTALLATlON & MAINTENANCE
INS-TIONIssue 1, November 1994
A.CONNECTING THE TRUNK CABLES TO
TEEMDFco 
lhmks
5.3Connect the CO trunks and Loop/Ground Start
Card (LGC) and/or Loop Start Card (LX) cables as out-
lined below. Note that step 2 mentions two installation
methods. Although the first method is more flexible, the
second method can be used to minimize the number of
terminal blocks that are used. Refer also to Figures 3-5
and 3-6 on the following pages.
(1)
(2)
(3)
Cross connect the CO trunks from the telephone
company RJ-type blocks to the 
righz side of the
LGC/LSC blocks.
NOTE: For additional lightning protection, see
paragraph 5.6 on the next page.
Mefhod A: Using enough 25-pair cable to run
from the LGC/LSC blocks to the cards, make the
termination cables. Attach a 
%)-pin female am-
phenol-type connector to one end of each 
LGC/
LSC cable. Label each connector and cable end
with the appropriate slot number (for example,
SLOT-15). These 
oo~ectors will be attached to
the cards after they are installed in the equipment
cabinet.
Method B: Using enough 25pair cable to run
from the LGC/LSC blocks to the cards, make thespecial termination cables. Attach up to three
%-pin female amphenol-type connectors to one
end of each 
LGC/LSC cable as shown in Figure
3-6. Connect CO trunks l-8 to one connector,
trunks 9-16 to another connector, trunks 17-24
to a third connector, and so on for each cable.
Label each connector with the appropriate slot
number (for example, SLOT-E). These connec-
tors will be attached to the cards after they are in-
stalled in the equipment cabinet.
Using standard electrical tape, tape two ferrite
split beads around each 
25-pair cable just below
the amphenol-type connector (as shown in Fig-
ure 
3-4 on the next page).NOTE: Ferrite beads must be installed to meet
Part 15 of FCC regulations. Refer to REPLACE-
MENT PARTS for the part number.
(4)Terminate the other end of each 
25-pair cable onthe left side of the corresponding 
LGCZSC
block.
(5)
Install bridging clips to complete the connec-
ti0I.B.
DID ‘D-u&
5.4Connect the Direct Inward Dialing (DID) trunks
and Inward Dialing Card 
(RX!) cables as follows. Referto 
Figure 3-7 on page 3-15 and Figure 3-19 on page
3-28.
NOTE: Resides DID trunks, IDCs can also be used toinstall single-line sets, playback devices, and 
off-
premises stations. Any combination using the eight cir-
cuits on the card is possible. Refer to pages 3-21 to 3-28
for station installation instructions.
(1)
(2)
(3)
(4)
Q
Cross connect the DID trunks from the telephone
company RJ-type blocks to the right side of the
IlX blocks.
NOTE: For additional lightning protection, see
paragraph 5.6 on the next page.
Using enough 
25-pair cable to run from the IDC
blocks to the Inward Dialing Cards, make the ter-
mination cables. Attach a 
50-pin female amphe-
nol-type connector to one end of each IDC cable.
Label each connector and cable end with the 
ap
propriate slot number (for example, SLOT-16).
These connectors will be attached to the Inward
Dialing Cards after the circuit cards are installed
in the equipment cabinet.
Using standard electrical tape, tape two ferrite
split beads around each 
25-pair cable just below
the amphenol-type connector (as shown in Fig-
ure 3-4 on the following page).
Terminate the other end of each 
25-pair cable on
the 
Zej? side of the corresponding IDC block.Install bridging clips to complete the connec-
tiOIlS.
Page 3-11 
						

							INS~TIONIssue 1, November 1994INTER-TELPRACTICESIMWGMX 256 INSTALLATION & MAINTENANCE
E&M’Ih&s5.5 Connect E&M trunks and E&M Card 
@MC)
cables as follows. Refer to Figure 3-g on page 3-16.
(1)Cross 
comtect the E&M trunks from the tele-
phone company RJ-type blocks to the right side
of the 
RMC blocks.
NOTE: For additional lightning protection, see
paragraph 5.6.(2) 
UsingenoughpaircabletorunfromtheEMC
blocks-to the EZ&M Cards, make the terminationcables. Attach a 
50-pin female amphenol-type
connector to one end of each EMC cable. Label
each connector and cable end with the appropri-
ate slot number (for example, 
SLQT-16). These
connectors will be attached to the 
-E&M Cards
after the telecommunication cards ‘are installed
in the equipment cabinet.
(3)Using standard electrical tape, tape two ferrite
split beads around each 
25pair cable just below
the amphenol-type connector (as shown in Fig-
ure 3-4 below).(4)Terminate the other end of each 
25-pair cable on:‘!,the ZejI side of the corresponding EMC block.::,
(5)Install bridging clips to complete the connec-
tiOIiS.
Lightning Protection
5.6For additional lightning protection, install gas dis-charge tubes with silicon avalanche suppressors to
ground (grounding rod or copper, cold water pipe) on
each CO, DID, E&M, and 
OPXtrunk. This must be done
external to the system. Each gas discharge tube is in-
stalled directly between the telephone company RI-type
block and the system’s 
CO/DID/E&M/OPX input. This
protection should give energy absorption and filter 
low-
level surge potentials. (For installation instructions and
specific recommendations, contact Customer Support.)
5.7Also, in areas with 
frequent occurrences of light-
ning, it is recommended that the cable between the tele-
phone company RJ-type blocks and the gas discharge
tubes be at least 75 feet long (the cable may be coiled up
if desired).
FIGURE 3-4.EXAMPLE OF FERRITE BEAD INSTALLATION
AMPHENOL-TYPE
CONNECTORS
25-PAIR CABLES
TO THE 
MDF
FERRITE
BEADS
Page 3-12 
						

							INTER-TELPRAcTICE!3IMX/GMX 256 INSTALLATION & MAINTENANCEINSTALIATIONIssue 1, November 1994
FIGURE 3-5.LGC/LSC BLOCK CABLE TERMJNATIONS (METHOD A)
LOOP/GROUND
START CARD OR
LOOP START
CARD
r
LGC/LSC
1.1 1,-RIUG-----
TIP-
121r-12----
RING -
AMPHENOL-
TYPE
CONNECTOR
66Ml-SO-TYPE
BLOCK
(PART OF 
MDF)
3 TEE0
RJ
Page 3-13 
						

							INS-TIONIssue 1, November 1994
lNTER.TEJaPRAcTIcEs
IMX/GMX 256 DKIXLLATION 2% MAINTENANCE
FIGURE 3-6.LGC/LSC BLOCK CABLE TERMINATIONS (METHOD B)
FEMALE AMPHENOL-TYPE CONNECTORS
LGWLSC
66Ml-50-TYPE BLOCK
(PART OF 
MDF)
------
TRUNK6 17-24
n--------
l-2WraL-oRR
25-PAIRCABLE TO 
-
MDF
6-16
Rm-aw
17-24f&WV
Page 3-14 
						

							INTER-TELPRACTICESIMX/GMX 256 INSTALLATION & MAINTENANCEINS-mONIssue 1, November 1994
FIGURE 3-7.IDC BLOCK CABLE TERMINATIONS
IDC
np-r 1.1 -RING ---
np -1.2 1I- 1.2 -RINB-
INWARD
DIALING
CARD
np1.8--1.8-RING--
RIONoTusED--
.
R/BR--BRlR.
Fm--I
~~-
SIR--BKBLAC ENABLEBL%K.1.111.1--
AMPHENOL-
TYPE
CONNECTOR
66Ml-%-TYPE
BLOCK
(PART OF 
MDF)TO
b TELCO
RJ
NOTE: The AC Enable terminations shown above are used only when installing single-lines sets and play-
back devices, not DID trunks. For information on their use, refer to the following pages.
Page 3-15 
						

							IN-TIONIssue 1, November 1994INTER-TELPRACTICESIMX/GMX 256 INSTALLATION & MAINTENANCE
FIGURE 3-8.EMC BLOCK CABLE TERMINATIONS
E&M
CARD
r
EMCH
,--Id IU
l-
AMPHENOL-TYPE
CONNECTOR66Ml-50-TYPE
BLOCK
(PART OF 
MDF)TO
TELCO
RJ
TO
TELCO
RJ
NOTE: Depending on the area of the country and/or the specific type of E&M trunk ordered, one or more of
the cable pairs shown above may not always be needed. For each E&M trunk to be installed, terminate all
cable pairs provided by the telephone company, as shown in the 
pinout above.
.
Page 3-16