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Mitel Sx 50 Dpabx Instructions Guide

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    							General Description 
ONS Line Card 
2.9 The ONS Line Card interfaces standard rotary and DTMF telephone sets in the same 
building to the 
DPABX. There are two configurations of the ONS Line Card: eight 
stations or 16 stations. 
Each ONS Line Card is equipped with a front edge 25-pair Connector which connects 
the cable 
to the MDF. Other major components include: 
l Line Interface circuitry, 
l Line protection circuits, 
l Line status LEDs (one per line), 
l Card status LED. 
Each line circuit provides the following facilities: 
l 2-wire&-wire conversion, 
l Analog-to-Digital/Digital-to-Analog conversion (^E Law), 
l Line circuit status monitoring, 
l Switchhook flash detection, 
l DC Loop supervision and pulse-dial digit collection and 
l Signaling (ringing, message waiting). 
OPS Line Card 
2.10 The OPS Line Card interfaces standard rotary diaTor DTMF telephone sets to the 
DPABX. The line ciicuits incorporate protective circuitry to permit connection to sets 
via wiring that goes outside the building housing the DPABX. Only loop resistance 
(maximum 1800 ohms) limits the distance possible between the SX-50 system and 
the telephone set. 
There are two configurations of the OPS Line Card: 4 stations or 8 stations. 
Each OPS Line Card is equipped with a front edge 25-pair Connector which connects 
the cable to the MDF. Other major components include: 
l Line Interface circuitry, 
l Line protection circuits, 
l Line status LEDs (one per line), 
l Card status LED. 
Each line circuit provides the following facilities: 
l Line protection circuitry, 
l 2-wire/4-wire conversion, 
100 2-16 Revision 0 9104-091-l 00-NA issue 5
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    							Physical Description 
9 Analog-to-Digital/Digital-t-Analog conversion (^E Law), 
l - Line circuit status monitoring, 
l Switchhook flash detection, 
l DC Loop supervision and pulse-dial digit collection, 
l Software-selectable balance networks-for long or short loops, and 
l Signaling (ringing, message waiting). 
DNIC Line Card _ 
2.11 The Digital Network Interface Circuit (DNIC) Line Card supports a maximum of eight 
SUPERSET 4 10 telephones or SUPERSET 420 telephones. 
Each DNIC Line Card is equipped with a front edge, 25--pair connector for the cable 
to the MDF. Other major components include: 
l DNIC Line Inter-face circuitry, 
l Line protection circuits, 
l Line status LEDs (one per line), 
l Card status LED. 
Each line circuit provides the following facility: 
9 Battery feed to power the telephones. 
COV Line Card 
2.12 The COV Line Card supports a maximum of 
8 SUPERSET 3 or SUPERSET 4 
telephones. 
Each COV Line Card is equipped with a front edge 25-pair Connector for the cable to 
the MDF. Other major components include: 
l SUPERSET Line Interface circuitry, 
l UART, 
l Modem, 
l Line protection circuits, 
l Line status LEDs (one per line), 
l Card status LED. 
Each line circuit provides the following facilities: 
l Amplitude Shift Keyed communication with SUPERSET 3 or SUPERSET 4 tele- 
phones, 
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    							General Description 
l Analog-to-Digital and Digital-to-Analog conversion (^E Law), 
l Battery Feed to power the sets. 
LS/GS Trunk Card 
2.13 
The LS/GS Trunk Card is available with four trunk circuits or eight trunk circuits per 
card. Each trunk circuit provides access to a central office loop start or ground start 
trunk. 
Each LS/GS Trunk Card is equipped with a front edge 25-pair Connector which 
connects the cable to the MDF. Other major components include: 
l Trunk interface circuitry, 
l Line protection circuits, 
l Line status LEDs (one per line), 
l Card status LED. 
Each trunk circuit provides the following facilities: 
l Loop Start or Ground Start (software-selectable), 
l Balance Network of 600 ohms or complex impedance (software-selectable), 
l Tip ground detection, 
l Ring Ground 
l Ringing voltage detection, 
l 2-wire/4-wire conversion, 
. Analog-tc+Digital and Digital-t*Analog conversion (^E Law), 
l Forward and reverse loop current detection, 
l Softwarr+controlled outpulsing, 
l Two Power Fail Transfer’(PFT) circuits per card. 
Direct Inward Dial (DID) Trunk Card 
2.14 The DID Trunk Card is available with four trunk circuits or eight trunk circuits per card. 
Each trunk circuit provides access to a central office DID trunk. 
Each DID Trunk Card is equipped with a front edge 25--pair Connector which connects 
the cable to the MDF. Other major components include: 
l Trunk interface circuitry, 
l Line protection circuits, 
l Line status LEDs (one per line), 
l Card status LED. 
100 2-18 Revision 0 9104-091-l 00-NA Issue 5
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    							Physical Description 
Each trunk circuit provides the following facilities: 
l Balance Network of 600 ohms or complex impedance (software-selectable), 
l Ring Ground, 
l 2-wire/4-wire conversion, 
l Analog-to-Digital and Digital-to-Analog conversion (^E Law), 
l Forward and reverse loop current detection. 
Universal Card _ 
2.15 The Universal Card supports a variety of peripheral functions; it is configured by 
attaching modules. These modules contain the circuits for E&M Trunks and RMATS. 
If the Control Card 2 (MCC2) is not installed, a Music on Hold/Pager module is also 
supported by the Universal Card. The Universal Card is equipped with a front edge 
2!5-pair Connector for the cable to the MDF. 
Each module has two vertical 32-pin female DIN connectors which mate to male 
connectors on the Universal Card. 
Each Universal Card provides the following facilities: 
l Four module positions, 
l Module activity LEDs (one per module), 
l Card status LED. 
E&M Trunk Module 
2.16 The E&M Trunk Module plugs into the Universal Card. It provides interface to Types 
1 or 5 E&M Trunks. Refer to Figure 2-13, E&M Trunk Module and Figure 2-14, E&M 
Trunk Module Dimensions. 
The E&M Trunk Module provides the following facilities: 
l Type 1 or Type 5 signaling, 
l Gain/loss plan for normal (Central Office) or satellite (PBX-to-PBX) trunks, 
l 600 Ohm or Complex termination, 
l 2-wire or 4-wire transmission, 
l Analog-to-Digital and Digital-to-Analog conversion (^E Law), 
l 4 Kbyte EPROM. 
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    							General Description 
CONNECTORS 
TO UNIVERSAL 
CARD 
000013 , 
Figure 2-13 E&M Trunk Module 
100 2-20 
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    							Physical Description 
3 
Figure 2-14 E&M Trunk Module Dimensions 
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    							General Description 
Music on Hold/Pager Module 
2.17 The Music on Hold (MOH)/Pager Module plugs into the Universal Card. It provides 
the input for music on hold, a paging output and a relay switch to an external paging 
amplifier. Refer to Figure 
2-l 5, Music on Hold/Pager Module and Figure 2-l 6, Music 
on Hold/Pager 
Module Dimensions. 
The major components of the MOH/Pager Module include: 
l Audio filter/amplitude limiter, 
9 Analog to Digital converter, 
l Paging pre-amplifier, 
l Paging control relay, 
l 4 Kbyte EPROM. 
The music input is isolated by a transformer and has an impedance of 150 ohms. The 
input signal should be between 50 and 200 mVrms. High frequencies are attenuated 
and amplitude limiting is applied when the signal exceeds 200 mVrms, as required by 
FCC Part 68 regulations. 
The paging output is isolated by a transformer and has an impedance of less than 200 
ohms. The output level feeds into a 600 ohm load and is typically -6 dBm. 
The control relay contacts are rated as follows: 
l maximum switching voltage -90 Vrms 
; maximum carrying current -0.4 Amps. 
DC10014 
I 
Figure 2-15 Music On Hold/Pager Module 
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    							Physical Description 
0 0 
0 0 
10 
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3[ 
0 
I 0 
DD0017 
Figure 2-16 Music On Hold/Pager Module Dimensions 
9104-091-l 00-NA Issue 5 
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    							General Description 
RMATS Module 
2.18 The Remote Maintenance and Test System (RMATS) Module is a modem which 
allows maintenance terminal access from the following: 
l a station, 
l a Direct-in Line, 
l a DISA Trunk, 
l an incoming CO trunk via the Attendant Console, or 
l Flexible Night Service. _ 
The RMATS Module is compatible with Bell 103 or CCITT V.21 standards and has the 
following data transfer characteristics: 
9 Data Rate - 300 Baud, 
l Mode - Full Duplex, 
l Parity - Even, 
l Stop Bits - 2 bits, 
l Number of Data Bits - 7 bits. 
The major components of the RMATS Module include: 
l Frequency Shift Key (FSK) Modem, 
l UART, 
l Analog-to-Digital/Digital-to-Analog converter, 
l 4 kbytes EPROM. 
Refer to Figure 2-17, RMATS Module and Figure 2-l 8, RMATS Module Dimensions. 
CONNECTORS 
TO 
UNIVERSAL 
CARD 
100 2-24 
Figure 2-17 RMATS Module 
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    							Physical Description 
- 
moo71  I ! 
/ 
1 
I 
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1 
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Figure 2-l 8 MATS Module Dimensions 
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