Mitel Sx 50 Dpabx Instructions Guide

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...

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...

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...

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...

General Description 
CONNECTORS 
TO UNIVERSAL 
CARD 
000013 , 
Figure 2-13 E&M Trunk Module 
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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...

Physical Description 
0 0 
0 0 
10 
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0 
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Figure 2-16 Music On Hold/Pager Module Dimensions 
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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...

Physical Description 
- 
moo71  I ! 
/ 
1 
I 
I 
1 
I I 
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Figure 2-l 8 MATS Module Dimensions 
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