Vodavi STARPLUS Triad XTS, Installation Manual

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Product Description 1-5
Chapter 1 - Introduction
There are nine universal slots in the MB (slots 0-8). Any kind of peripheral card can be installed
in the universal slot, but a peripheral card that contains a CPU cannot be installed in Slot 8 of
Cabinet 0 (T1, PRIB, BRIB, VOIP, LCOBC, SLIBC). There are fixed slots for the PSU, PFTU, MPB, LMU,
RGU3, and RAU.
Power Supply Unit
A Power Supply Unit (PSU) is required in each Cabinet of the Key Service Unit. The PSU converts
commercial AC power (110 - 127 / 220 - 240V AC @ 50-60 Hz) to DC voltages, regulates the
voltages, and provides the appropriate DC voltages to the backplane for distribution to other
system components. Three DC outputs are provided: ±5V DC, +30V DC. LEDs in the PSU front
panel indicate valid outputs as well as the presence of AC input power.
The PSU includes circuitry to charge externally connected 24-volt batteries and controls
operation of the battery back-up circuits. The PSU will provide system operating voltages from
the batteries if commercial AC power fails. The battery back-up control circuitry is incorporated
in the PSU to disconnect the batteries prior to a deep discharge or over-charge.
Ring Generator Unit
The Ring Generator Unit (RGU3) provides the ring voltage to the SLIB circuits to ring the SLT. The
RGU3 also provides the input to the Message Wait source on the SLIB cards. The output of the
RGU3 is 65V AC, 25 Hz. The RGU3 can support simultaneous ringing for 15 SLTs.
The RGU3 is fitted on the lower right side panel inside the Cabinet.
Main Processing Board
The Main Processing Board (MPB) controls and manages communication between peripheral
interface, supervises all resources in the system, controls gain adjustment of PCM signal,
generates system tone, and manages call processing of the system. The two MPBs available for
use with the
XTS are the MPB1 and MPB2. MPB1 is used for a single-cabinet installation only .
MPB1
The MPB1, incorporates the system's RAM, master clock, 2 RS-232C ports, and the system's PCM
voice processing and main micro-processor. The microprocessor is a 32-bit high speed “RISC”
CPU which receives and transmits signaling information from/to other PCBs, controls feature
activation, and PCM time-slot interchange. The MPB has 4 built-in DTMF receivers.
LD1 is the PLLU Synchronization Indicator. This LED will be lit when the PLLU on the MPB has
synchronized with an external clock signal provided to the KSU via a BRI, PRI, or T1 circuit.
LD2-LD9 indicate the operation of the XTS system. LD10-LD13 are reserved for future use.
The MPB1 has the same features as the MPB2 described below, but does not include the
following: Paging Port, MOH Port, Port 5, or Ethernet Jack.
The Real-Time Clock and the 2 MB of SRAM that is associated with the system database are
protected in cases of power loss by a long life-high energy lithium battery. Onboard ROM
contains PCM tone, gain table, etc. needed for digital voice processing.
The 4 MB of flash ROM on the Program Module Unit (PMU) for the MPB1 contains basic system
operating software. A Modem Unit (MODU) can be installed on the MPB, for remote
programming. The MPB can only be installed in the MPB slot in Cabinet 0.
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Add-on Boards: MODU and PMU