Mitel Sx 50 Dpabx Instructions Guide

							Shipping, Receiving and Installation 
200 5-32 Revision 0 9104-091-200-NA issue 5  
						

							6 . 
CABLING AND 
CROSS-CONNECTIONS 
General 
6.1 This Part details the cabling and cross-connections required for installing the SX-50 
communications system. 
Telephone Set and Trunk Cabling 
6.2 Telephone set and trunk cabling terminates on the building cross-connect terminal in 
the normal manner. Central Office trunk loop resistance limit is 1600 ohms. 
Cross-Connections 
6.3 Connection between the equipment cabinet and the MDF should be made using 28 
AWG connector-ended 2%pair cables. Cross-connections should be made in 
accordance with Table 6-1, Tip and Ring Assignments. For message registration 
connections refer to Figure 6-1, Message Registration Connections. For E&M trunk 
connection, refer to Figure 6-3, E&M Trunk Wiring. 
Run jumpers using A-type 24 AWG cross-connecting cables. 
FCC Cross-Connection Frame Recommendations 
6.4 Trunk circuits must be connected sequentially to the telephone company interface 
jack. The cabling requirements and limits for trunks are as detailed above. All cables 
connecting trunk circuit pairs must be connectorized. 
Power Failure Transfer 
6.5 The “cut-through” relays provided can connect Central Office trunks (two trunks per 
LS/GS Trunk Card) to selected station lines (refer to Figure 6-2, Power Fail Transfer 
Connections). The sets must be compatible with the ONS Line Card and the trunk. 
(Note: DTMF sets can be used only if the trunks accept DTMF dialing). The relays 
operate under the following conditions: 
Incoming Calls. After a power failure transfer has occurred, the Central Office applies 
ringing to the station for incoming calls directly to the selected station line. 
Outgoing Calls. To place an outgoing call through a ground start CO trunk, with the 
system in Power Fail Transfer Mode, the station originating the call must be equipped 
with a ground key (i.e., CM1470). Pressing the ground key momentarily, applies a 
ground to the Ring side of the line, which energizes theC0 equipment. One side of the 
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							Shipping, Receiving and Installation 
ground key must be connected to a ground and the other to the Ring conductor of the 
station line. Call origination over loop-start trunks does not require a ground start key. 
Table &I Tip and Ring Assignments, 
Universal Card Lead Designation 
Pair ONS 
COV and LSIGS Trunks Module E&M+ 
Pin Colour 
Line DNIC DID Trunks Position MOH PagerC 
Trunk 
Line OPS Line 
26 
W-BL Tip 1 Tip 1 Tip 1 Music In A . 
1 
BL-W Ring 1 lip,1 
Ring 1 Ring1 
Music In B 
27 
w-o 
Tip2 Ring 1 
Tip2 MMl++ 1 TRI 
2 
O--W Pager Out A 
Ring 2 Ring2 Ml 
28 
W-G Pager Out B RR1 
Tip3 Tip3 
3 G-W Tip2 
Contact A+ El 
Ring 3 Ring 3 Ring 2 
29 
W-BR Contact B Ml 
Tip4 Tip4 
MM2 
4 BR-W 
Ring 4 Ring 4 M2 ,. 
30 
w-s TIP5 Tip5 
5 
s-w Tip3 
Music A 
Ring 5 Tip2 
Ring 5 
31 
R-BL Ring 3 
Music B 
Tip6 Tip6 Ring 2 
MM3 2 
Pager Out A TR2 
6 
BL-R Ring 6 
Ring 6 M3 RR2 
32 R-O 
Tip7 Tip7 
Tip4 Pager Out B 
Contact A E2 
7 
(3-R Ring 7 
Ring 7 
33 R-G Ring 4 
Contact B M2 
Tip8 Tip8 
MM4 
8 
G-R Ruing 8 
Ring 8 M4 
34 R-BR 
Tip9 
Tip5 
9 BR-R 
Ring 9 Music A lip3 
35 
R-S Ring 5 
Tip 10 Music B Ring 3 
MM5 3 TR3 
10 S-R 
Ring 10 
M5 Pager Out A 
RR3 
36 
BK-BL Tip 11 
Tip6 Pager Out B 
11 BL-BK Contact A E3 
Ring 11 Ring 6 
M3 
37 
BK-0 Contact B 
l-lp 12 
MM6 
12 OBK 
Ring 12 M6 
38 
BK-G Tip 13 Tip7 
13 G-BK Music In A 
Ring 13 Ring 7 Tip4 
39 
BK-BR Music In B 
Tip 14 MM7 Ring 4 
4 
14 Pager Out A TR4 
BR-BK Ring 14 M7 
RR4 
40 
BK-S iipl5 Tip8 Pager Out B 
E4 
15 
S-BK Ring 15 Ring 8 Contact A 
41 Y-BL Contact B M4 
Tip 16 MM8 
16 BL-Y Ring 16 M8 
42 
Y-O Not Used 
17 O-Y Not Used 
43 
Y-G STATION Tl* 
18 G-Y STATION Rl” 
44 Y-BR ONS LINE CARD Tl 
19 
BR-Y ONS LINE CARD Rl 
45 
Y-S TRUNK Tl 
20 
S-Y TRUNK Rl 
46 V-BL TRUNK CARD Tl 
21 
BL-V TRUNK CARD Rl 
47 v-o STATION T2 
22 
o-v STATION R2 
48 V-G ONS LINE CARD T2 
23 
G-V ONS LINE CARD R2 
49 
V-BR TRUNK T2 
24 
BR-V TRUNK R2 
50 
v-s TRUNK CARD T2 
25 s-v TRUNK CARD R2 
. - 
200 6-2 
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							Cabling and Cross-Connections 
Notes for Table 6-1, TIP AND RING ASSIGNMENTS 
*- The SX-50 system only supports one MOH/Pager Module and one RMATS 
Module. If a Control Card 2 (MCC2) is installed, an MOH/Pager Module is not 
required. When both a Control Card 2 and an MOH/Pager Module are installed, the 
system ignores the MOH/Pager Module. 
rM LS/GS only: Pins 43, 18 are the first lead designations forthe Power Fail Transfer 
circuits (2 per LS/GS Trunk Card). Refer to Figure 6-2, Power Fail Transfer 
Connections for details. 
+ For 2-Wire E&M Trunk Operation, DO NOT connect RR and JR leads. Refer to 
Figure 6-3 and Figure 6-4, E&M Trunk Wiring. 
++ LS/GS only: MM Lead is the Ring Message Lead and M Lead is the Tip Message 
Lead. Refer to Figure 6-1, Message Registration Connections. 
+ When the Pager is engaged, Contact A connects with Contact B. 
-F  
-++-I- 
n MM 
\ 
-48V 
co 
MDF LWGS 
TRUNK 
CARD 
DD0058 
Figure 6-l Message Registration Connections 
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							Shipping, Receiving and Installation 
T 45 
SET1 
TO - 
co R 20 
I - 
SET2 T 49 
_^ - iV,UY 
TRUNK T 
CARD 
Hkl R 
- 
11 T 
- 
I 
‘- -TJ-. I I 
23 R 
NOTE: DOTED LINES SHOW POWER FAIL TRANSFER MODE ONS 
LINE 
CARD 
200 64 
Figure 6-2 Power Fail Transfer Connections 
Revision 0 
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							Cabling and Cross-Connections 
Z-WIRE CONFIGURATION 
I 
T 
R 
TR 
E&M 
IN SYSTEM RR 
A 
M 
E N/C N/C 
N/C 
N/C T 
R 
TR 
RR E&M 
IN SYSTEM 
M B 
E 
&WIRE CONFIGURATION 
I I 
T 
R 
TR 
E&M 
IN SYSTEM RR E&M 
IN SYSTEM 
A 
M B 
E 
DD0060 
Figure 6-3 E&M Trunk Wiring (Back to Back) 
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							Shipping, Receiving and Installation 
r 
P-WIRE CONFIGURATION 
I 
4-WIRE CONFIGURATION 
T 
R 
E&M 
IN SYSTEM 
A 
M - TR 
RR TELE- 
PHONE 
M COMPANY 
E . E 
DD0061 
Figure &4 E&M Trunk Wiring (PABX to Telephone Company) 
200 6-6 
Revision 0 9104-091-200-NA Issue 5  
						

							Appendix A. 
FCC INTERCONNECTION 
REQUIREMENTS TELEPHONE 
COMPANY INTERCONNECTION 
This equipment has been approved by the Federal Communications Commission 
(FCC) as not being harmful to telephone network when connected directly to the 
telephone lines through the standard 50-pin blue ribbon plug prescribed by the FCC 
Rule. This Appendix is applicable to the telephone interconnection in the United States. 
Notification 
A.1 Prior to the interconnection of this equipment, the local telephone company must be 
notified; inform the company of the FCC-registered equipment connected to their 
trunks and give them the following information: 
l The Communications System being connected is a MITEL Model SX-50 system. 
l The 14-digit FCC Registration Number which is BN285B-16887-MF-E for systems 
manufactured in the United States, BN24CK-16185-MF-E for systems manufac- 
tured in the United Kingdom 
l The Ringer Equivalence Number which is 1 .OB. 
. The jacks or connectors required are RJ21 X. (One jack is required for each group of 
eight trunks). 
l ’ Private line terminations are: 
Circuit Facility 
Interconnect Connector/Jack 
2-wire E&M Type I TLllM RJ2EX 
4-wire E&M Type I TL31 M RJ2GX 
Loop Start CO Trunks 02LS2 RJ21 X 
Ground Stan CO Trunks 
02GS2 RJ21X 
DID Trunks 02 RV2- RJ21X 
OPX 
Lines OL13B RJ21 X 
l The OPS interfaces available with this product are registered with the FCC as being 
Class B. 
l When programming the programmed dialer feature (i.e., Speed Dial) for emergency ser- 
vices (e.g., 911 or 7-digit telephone numbers), or when verifying these numbers by 
making test calls, please note the following: 1. Remain on the line until answered and 
briefly explain to the dispatcher the reason for the call before hanging up. 2. Perform 
such activities in the off-peak hours, such as early mornings or late evenings. 
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							Shipping, Receiving and Installation 
Connection Limitations 
A.2 Due to the FCC Part 68 Rule, no connection can be made to party lines or coin 
telephone services. 
Network Changes 
A.3 The telephone company may make changes to its communication service. Such 
changes may include the change of trunk circuits, but, for such changes, the 
_. 
company shall provide official notification so that the operation of the DPABX service 
is not interrupted. 
Maintenance Limitations 
A.4 This equipment has been registered with the FCC for direct connection to the 
telephone network. Under the FCC Program, the usher is restricted from making any 
changes or repairs and from performing any maintenance operations other than 
those specifically included in this set of MITEL Standard Practices. 
Circuit cards may be removed by the user; however, replace- ment cards are supplied 
only by MITEL or its authorized agent. No field repair of circuit cards by the user is 
allowed. 
The user is not permitted to make cabling or wiring changes within the Attendant 
Console. Plug-ended cables as detailed in the MITEL Standard Practices, are required 
for all external connections between the SX-50 system and the Main Distribution 
Frame (MDF). 
Power Supply components and cabling can only be changed and maintained by MITEL 
or by an authorized agent of MITEL. 
Trouble Corrections / 
A.5 
System Diagnostics report .most troubles and the Attendant Console LCD indicates 
the circuit and card that are malfunctioning. 
The user can replace cards. The user 
should always ensure that the system power is turned OFF when replacing the 
the Generic Module or Universal card. 
For more complex malfunctions, MITEL or its authorized agents provide appropriate 
field service. 
200 A-2 Revision 0 9104-091-200-NA Issue 5  
						

							Appendix B. 
SYSTEM GROUNDING AND 
SURGE PROTECTION 
REQUIREMENTS 
This Appendix describes the basic theory of protection techniques with associated 
installation procedures. These techniques have proved - effective ‘in electronic 
equipment protection. 
Reliable service from electronic switching systems can only be ensured if care is taken 
to protect the solid-state circuitry of the switching system from the effects of electrical 
surges of various kinds. Typically this electrical energy enters the switching system 
electronics through external connections. The three energy types are: 
l AC power surges due to lightning storms, brown-outs and inductive “kicks” pro- 
duced by heavy-duty electrical machinery (motors, generators, air conditioners, 
etc.), which may perturb the ac power supply. 
l Lightning or fallen power lines can cause surges, which enter the DPABX via off-pre- 
mises cables, which may be telephone company trunks or private off-premises 
stations (OPXs). An OPX for the purposes of this document is any pair of wires con- 
nected to the DPABX and terminated outside the building in which the DPABX is 
located. 
l Electrostatic discharges from telephone set users, which enter the DPABX when 
subscribers touch telephone instruments. 
AC Power-Line Surges 
B.l A power-line surge protector plugs into any standard 115 Vat 3-prong duplex 
receptacle and provides effective overvoltage protection for ac-powered DPABXs. 
This protector is.recommended in geographic areas subject to severe lightning 
storms, where ac power is disrupted by inductive “kicks” (produced by heavy 
machinery) or where local ac transient protection is suspect. ac power surge 
protectors are manufactured with many clipping voltages which must be specified 
when ordering. 
Operation of Surge Protectors. The surge protector can be effective for both transient 
overvoltage and persistent over-voltage. 
. Transient Overvoltage. Overvoltage on either line and/or neutral (refer to 
Figure B-l) of the ac power breaks the gas tube arrestor at a safe voltage level. The 
excess energy on the line or neutral shunts harmlessly to the safety ground for the 
duration of the transient. 
l Persistent Overvoltage. If the overvoltage on the ac power persists, a “thermal cir- 
cuit breaker” in the arrester mechanically disconnects the DPABX. When the 
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