Mitel Sx 2000 Llightware 32 General Information Guide

							Configuration
50003097 Revision A 17
SX-2000 MICRO LIGHT System
The SX-2000 MICRO LIGHT system is a non-redundant configuration that can support up to 
four expanded peripheral nodes or two DSU nodes.
The SX-2000 MICRO LIGHT node consists of the following components:
Control cards: The SX-2000 MICRO LIGHT cabinet contains a 
Main Controller card and 
a 
Control Resource card. The Main Controller card is located in slot 1 (PLID 1 1 1), and 
the Control Resource card is located in slot 2 (PLID 1 1 2).
 Peripheral Switch Controller Card (PSC): The 
Peripheral Switch Controller card per-
forms all the peripheral switch functions for up to twelve Peripheral Interface cards 
(twenty-four with an expanded peripheral node). The PSC card is installed in slot 16 (PLID 
2 1 16).
 Peripheral Interface Cards: The SX-2000 MICRO LIGHT cabinet holds up to eight 
Pe-
ripheral Interface cards
. These cards join telephone trunks and peripheral devices (such 
as SUPERSET telephones) to the system. The Peripheral Interface cards are located in 
slots 4 to 11 (PLIDs 2 1 4 to 2 1 11).
 Digital Service Unit (DSU) Cards: The SX-2000 MICRO LIGHT cabinet holds up to four 
DSU cards. These are intelligent cards that provide specialized digital functions. The DSU 
cards are installed in slots 2 to 5 (PLIDs 3 1 2 to 3 1 5).
 CEPT (Committee for European Posts and Telegraph) Interface Assembly II: This 
interface assembly provides four filtered BNC connectors (typically used with coax cable 
for Ethernet, video, and RF signals) for the external digital trunks that connect to the CEPT 
Formatter I and II cards. Most CEPT Formatter cards require a CEPT Interface Assembly 
II  (depending on system set up, sometimes an Interface Assembly may be used).
 Interface Assembly: This interface assembly provides RJ45 connection for the external 
digital trunks that connect to the DS1 Formatter I and II cards.  
						

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18 Revision A 50003097
 Fiber Interface Modules (FIMs): The SX-2000 MICRO LIGHT cabinet holds up to four 
Fiber Interface Modules (FIMs).
 FIM Carrier Card: This card connects a FIM to the SX-2000 MICRO LIGHT main control. 
Each FIM Carrier card has a FIM mounted on it. You can install up to four FIM Carrier 
cards in PLIDs 1 2 1 to 1 2 4.
 Hard Disk Drive: The 3.5 inch wide x 1 inch high SCSI hard disk is mounted on the front 
panel at the top of the cabinet. The hard disk drive is visible through an opening in the 
front cover.
 Remote Storage Device (RSD) drive: An ISO-standard, 3.5 inch, magneto-optical disk 
drive is mounted just below the hard disk drive on the front of the cabinet.
Cabinet Frame: The SX-2000 MICRO LIGHT cabinet supports the system cards and 
components.
Power Distribution Unit (AC): The AC PDU filters and switches the 120/240 Vac input 
power to the  power converter and fan assembly.
Power Distribution Unit (DC): The DC PDU filters and switches the -48 Vdc input power 
to the power converter and fan assembly.
Power Converter (AC): The AC Power Converter converts the AC input power to the 
voltages required by the circuit cards, hard disk drive, and RSD drive. The converter is 
installed in PLIDs 2 1 13 to 2 1 15.
Power Converter (DC): The DC Power Converter converts the DC input power to the 
voltages required by the circuit cards, hard disk drive, and RSD drive. The converter is 
installed in PLIDs 2 1 13 to 2 1 15.
 Control Panel: The control panel, located on the right side of the front panel below the 
hard disk, provides system 
controls and indicators. The control panel is not visible unless 
the front panel of the cabinet is removed.
 Backplane: The backplane provides slots to accommodate connection to the Main Con-
troller card, Control Resource card, four DSU cards or FIM Carrier cards, one PSC card, 
eight Peripheral Interface cards, and the AC power converter. In addition, it provides the 
physical and electrical interface to the SCSI ribbon cable for the hard disk drive and RSD 
drive, the power cable connectors, the printer port connector, the maintenance port con-
nector, the remote alarms port connector, and the control panel connector.
 Rear Panel: The following switches and connectors are located on the rear panel of the 
cabinet:
- A power on/off switch
- One fuse to protect the input power
- A 3-conductor male receptacle for connecting the AC power cord or DC terminal block
- An RS-232 maintenance port (J1) (DB-9 filtered connector)
- An RS-232 printer port (J2) (DB-9 filtered connector) for Station Message Detail Re-
cording (SMDR)
- A Remote alarms port (J9) (DB-9 filtered connector)
- Six 25-pair male, filtered, D-phone connectors (J3 to J8). All lines and trunks from the 
main distribution frame connect to these connectors using 25-pair cable. Pins on con-
nector J7 also provide power and contact closure to an optional external system fail 
transfer unit. 
						

							Configuration
50003097 Revision A 19
- A 3 inch wide x 4 inch high (7.6 cm x 10.2 cm) metal box projecting from the middle of 
the panel. The box holds up to four CEPT or DS1 interface assemblies.
- A small rectangular opening with a sliding cover to route fiber optic cables into the 
cabinet
- A ground connector.
 Exhaust Fans: Two fans cool the cabinet.
Peripheral Cabinets
Each peripheral cabinet holds up to 12 Peripheral Interface Cards and provides up to 192 ONS 
or DNI ports. By purchasing the Peripheral Node Expansion feature package, a slave cabinet 
can be added that expands the node up to a total of 384 ports and 24 Peripheral Interface cards 
(the number of voice channels remains the same). One Peripheral Switch Controller (PSC) 
card and one Fiber Interface Module (FIM) is installed in the master cabinet of each peripheral 
node. The PSC card provides control for all Peripheral Interface cards, and fiber optic cable 
connects the FIM to the main control.
Note:A slightly smaller 3300 peripheral cabinet variant is available which will fit into a 19 rack. All 
components described below are the same. 
Peripheral Cabinet II
The peripheral cabinet consists of the following components:
 Peripheral Interface Cards: The 
Peripheral Interface cards connect telephone trunks and 
peripheral devices (such as SUPERSET telephones) to the system. They are located in 
slots 1 through 12. 
						

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20 Revision A 50003097
 Power Converter (AC): The AC power converter converts AC input power to the voltages 
required by the circuit cards and FIMs (+5 Vdc, +12 Vdc, -27 Vdc, -48 Vdc and 80 Vac 
ringing). It is installed in slots 13 to 15.
 Power Converter (DC): The DC power converter converts DC input power to the voltages 
required by the circuit cards and FIMs (+5 Vdc, +12 Vdc, -27Vdc, and 80 Vac ringing). It 
is installed in slots 13 to 15.
 Peripheral Switch Controller card (PSC): The 
PSC card performs all peripheral switch 
functions for up to 12 Peripheral Interface cards (or 24 cards with the addition of a peripheral 
slave cabinet, see 
Peripheral Node Expansion feature package for details). It is installed 
in slot 16 of the master peripheral cabinet.
 Fiber Interface Module (FIM): The 
FIM connects the peripheral node to the control node. 
It is installed in slot 17 of the master peripheral cabinet.
 Cabinet Frame: Each peripheral cabinet has 17 slots numbered from left to right. Slots 1 
to 12 support Peripheral Interface cards and slots 13 to 15 hold the Power Converter. A 
master peripheral cabinet also holds a PSC card in slot 16, a FIM in slot 17, and a Peripheral 
Interconnect card in slot 16B (if your node is expanded). A peripheral slave cabinet holds 
a Peripheral Interconnect card in slot 16, in addition to the Peripheral Interface cards and 
Power Converter. Slots 16B and 17 of the slave cabinet are not CDE programmable (for 
more information on expanded peripheral nodes, see the Peripheral Node Expansion 
feature package). 
Note: 3300 peripheral cabinets with a slightly smaller frame are available for stacking in 
a 19 rack.
 Power Distribution Unit (PDU) (AC): The AC PDU filters and switches the 120/240 Vac 
input power to the Power Converter and fan assembly.
 Power Distribution Unit (PDU) (DC): The DC PDU filters and switches the -48 Vdc input 
power to the Power Converter and fan assembly. Note that the server is available in AC 
version only.
 Fan Assembly: Two fans in the removable fan assembly cool the cabinet.
 Rear Panel: The following switches and connectors are located on the rear panel of the 
cabinet:
- A power on/off switch
- A fuse to protect the line lead on the input power (AC systems) or circuit breaker (DC 
systems)
- A 3-conductor male receptacle to connect AC input power
- A sliding door for the Tx and Rx fiber optic cables
- An RS-232 Maintenance Terminal port for remote access (remote maintenance con-
nections will only work on the master cabinet of a peripheral pair)
- Nine 25-pair male, filtered, Amphenol connectors are located on the rear panel. All 
lines and trunks from the main distribution frame connect to the eight horizontally 
positioned connectors using 25-pair cable. The single vertically positioned 25-pair 
D-phone connector provides power and contact closure to an optional external system 
fail transfer unit. 
						

							Configuration
50003097 Revision A 21
- A 3-conductor female plug is recessed in the rear panel behind a small cover plate (AC 
systems only).  The plug connects to the power connector on the AC Power converter.
- A ground connector.
Note:For details on expanding a peripheral node, see the Peripheral Node Expansion section of the 
Technical Documentation CD-ROM.
SUPERSET HUB
The SUPERSET HUB builds on the distributed system concept by delivering advanced digital 
telephony functionality for workgroups. It allows SUPERSET telephones to be cost-effectively 
provided where a distributed system would be too expensive.
The SUPERSET HUB provides DNIC connectivity through an RJ-45 patch panel and Fibre 
Interface Module (FIM) connection to the host peripheral cabinet. At the peripheral cabinet, a 
carrier module provides the connection for the FIM and interfaces back into the system. The 
SUPERSET HUB may be rack-mounted or wall-mounted.
SUPERSET HUB
System Fail Transfer
The SFT maintains telephone service in the event of system failure (such as a power outage). 
When the system goes into SFT mode, the SFT unit connects up to six internal POTS telephone 
extensions directly to the CO, bypassing the system completely.
The SFT is an optional, stand-alone, wall-mounted device that connects to the system’s 
peripheral cabinet or main distribution frame (MDF). Each SFT can control six circuits, and up 
to four SFTs can be daisy-chained together for each zone, providing security for 24 internal 
extensions.
The SFT switches to SFT mode under the following conditions:
  Failure of the system power converter
  Failure of the system main control (in a redundant system, both main control planes must 
fail, causing a critical alarm to all zones) 
						

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22 Revision A 50003097
  Interruption of the system AC power 
  Failure of the peripheral switch controller (zone)
  Loss of the fiber link between the main control and peripheral cabinets.
Power Supply
All power for the SFT unit is provided from the -48 Vbat source on the system. A source of -12 
V powers the electronic circuitry on the card. This supply is derived from the -48 V input and 
powers all the SFT circuitry except the transfer relays. The relays are powered by a 
transistor-regulated -41V source, also derived from the -48 Vbat input; therefore, in the event 
of Vbat varying between the standard -42.5 V to -56.5 V, the current drain remains constant.
Transfer Relays
Each circuit in the SFT uses a four form C relay to transfer between normal and SFT modes 
of operation.
Loop Detector
When a transfer relay enters SFT mode, the loop detector connects in series with the loop 
between the extension and CO trunk facility. This circuit prevents the extension from returning 
to normal operating mode before an SFT mode call is completed. When the SFT mode call is 
completed, the extension is returned to normal operating mode.
SFT Control Leads
The transfer control sensor on the SFT senses a loop closure across the SFT and SFT return 
(SFTR) leads. When a loop closure is sensed, the power to the relays is removed, the relays 
are released, and all circuits enter the transferred state.
Power Consumption
The total current drain for the SFT is typically 80 mA.
Power Dissipation (watts)
Power SupplyTYP. (Watts)TYP+20%
-48Vbat3.183.81
@Vbat=-56 V3.714.45 
						

							Configuration
50003097 Revision A 23
Peripheral Cards
Peripheral Interface cards join telephone trunks and peripheral devices (such as SUPERSET 
telephones) to the system. Peripheral interface cards include
• Line cards: Connect to single line sets, SUPERSETs, attendant consoles, and 
DATASETs
 Trunk cards: Provide an interface from the system to the public switched network and 
leased lines.
Line Cards
Line cards include
  COV line card
  DNI line card
  ONS line card
 OPS line card.
COV Line Card
The Control Over Voice (COV) line card supports COV voice mail systems, and interfaces a 
maximum of SUPERSET 4 telephones to the SX-2000 system. The COV line card has 12 
circuits.
DNI Line Card
The Digital Network Interface (DNI) line card supports music-on-hold and paging, and interfaces 
with MITEL digital network devices, including SUPERSET telephones, attendant consoles, and 
DATASETs. The DNI line card provides 16 voice and data lines, and has 16 circuits.
ONS Line Card
The On-premises (ONS) line card connects a maximum of 16 standard telephones with line 
loop resistance of 400 ohms or less. As such, the ONS line card is used to connect internal 
telephone extensions close to the system. The ONS line card also supports modems and fax 
machines. The ONS line card has 16 circuits.
OPS Line Card
The Off-premises (OPS) line card is a digital card that interfaces a maximum of eight outside 
telephone extensions with the system. The card is meant to interface telephone extensions 
whose line loop resistance exceeds 400 ohms. As such, the OPS line card is used to connect 
external telephone systems whose loop resistance is anywhere from 400 to 1600 ohms 
(external resistance from 600 to 1800 ohms). The OPS line card has eight circuits. 
						

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24 Revision A 50003097
Trunk Cards
Trunk cards include
 LS/GS trunk card
  E&M trunk card
  DID Loop Tie trunk card.
LS/GS Trunk Card
The Loop Start/Ground Start (LS/GS) trunk card interfaces to the analog LS/GS Central Office 
(CO) trunks, and is used to terminate eight CO trunks (non-dial-in trunks). The LS/GS trunk 
card connects to any Peripheral Interface card slot on the peripheral shelf via connectors J1 
and J2. The LS/GS trunk card has eight circuits.
E&M Trunk Card
The Ear and Mouth (E&M) trunk card provides a means of interfacing four external trunk circuits 
to the system. E&M trunk cards connect to any Peripheral Interface card slot on the peripheral 
shelf via connectors J1 and J2. The E&M trunk card ties two switches together (tie line), and 
supports music-on-hold. The E&M trunk card has four circuits.
DID Loop Tie Trunk Card
The Direct Inward Dialing (DID) Loop Tie trunk card terminates a maximum of four trunks. 
These trunks can be Direct Inward Dialing (DID) trunks, Loop Tie (LT) trunks, or any combination 
of DID and LT Trunks. Direct Inward Dialing provides direct access to system subscriber lines 
from the public telephone network. Loop Tie provides a means of connecting two systems 
together over a common trunk.
The DID Loop Tie trunk card involves renting a group of numbers from the CO. With this card, 
outside calls are switched directly to the extension called; therefore, no attendant is required. 
						

							Configuration
50003097 Revision A 25
Digital Service Unit (DSU) Cabinet
A DSU cabinet holds up to four DSU cards and two FIMs. The DSU cards provide digital trunk 
interfaces for public or private network access and specialized digital functions (such as 
messaging, expanded conferencing, and ISDN service). The FIMs support the transmission of 
voice and data signals between nodes.
The DSU cabinet consists of the following components:
 Cabinet Frame: The DSU cabinet is separated into two shelves. Shelf 1 is located at the 
bottom of the cabinet and Shelf 2 is located at the top of the cabinet (both shelves are at 
the front of the cabinet). Shelf 1 consists of slots 1 to 6 and contains 2 FIMs and 4 DSUs. 
Shelf 2 consists of two Peripheral Resource Cards (PRCs).
 Power Supply: The 200 Watt AC or 150 Watt DC power supply provides power for the 
cabinet. The power supply fan cools the cabinet.
 Peripheral Resource Cards: The 
peripheral resource cards provide additional circuitry to 
support the distributed architecture. These cards are installed in Shelf 2, slots 1 and 6.
 Fiber Interface Modules (FIMs): The DSU cabinet holds up to two 
fiber interface modules 
(FIMs). Each FIM supports two DSU cards; the FIM installed in Shelf 1, slot 1 supports 
the DSU cards in Shelf 1, slots 2 and 3. The FIM in Shelf 1, slot 6 supports the DSU cards 
in Shelf 1, slots 4 and 5. 
 DSU Cards: The DSU cabinet holds up to four 
DSU cards. These are intelligent cards 
that provide specialized digital functions. The DSU cards are installed in Shelf 1, slots 2 to 5. 
						

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26 Revision A 50003097
 DSU Backplane: The backplane holds up to four DSU cards, two fiber interface modules, 
two 
peripheral resource cards, the power supply cable, and two Maintenance Terminal 
ports. The four DSU cards are split into pairs (each pair with a FIM, Peripheral Resource 
card, and maintenance port). The following switches and connectors are located on the 
DSU backplane (rear panel):
- A power on/off switch
- A small red sliding switch for selecting the input power source. The switch can be set 
to either 115 Vac, 60 Hz or 230 Vac, 50 Hz (AC systems only).
- A 3-conductor male receptacle to connect AC power (AC systems only)
- A 3-conductor terminal block to connect DC power (DC systems only)
- A sliding panel for the Tx and Rx fiber optic cables
- Two RS-232 Maintenance Terminal ports
- A 3 inch wide x 4 inch high (7.6 cm x 10.2 cm) metal box projecting from the middle of 
the panel. The box holds up to four CEPT or DS1 Interface Assemblies.
CAUTION: Do not connect any devices to the female power receptacle.