Vodavi STARPLUS Triad XTS, Руководство по установке

Страница: 14 / 138

1-6 Product Description
Chapter 1 - Introduction
MPB2
The MPB2, incorporates the system's RAM, master clock, 1 external MOH port, 1 external paging
port, 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 Real-Time Clock and the 4 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 8 MB of flash ROM on the Program Module Unit (PMU) for the MPB2 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.
»
Add-on Boards: MODU and PMU
Miscellaneous Board
The Miscellaneous Board (MISB) incorporates the circuitry and interfaces for common optional
features including:
External Paging 2 ports
External Control Contacts 4 contacts
External BGM & MOH 2 ports
Alarm 1 input
RS-232C (optional SIU) 2 ports
An RJ21-type female connector is mounted on the front edge of the MISB for the connection
to the above circuits, except RS-232C serial interfaces. One MISB board can be installed in Slot 8
of Cabinet 0.
»
Add-on Board: SIU
Link Module Unit
The Link Module Unit (LMU) provides a link between the Cabinets of the KSU. LMU1 must be
installed to connect the Cabinet 0 to the Cabinet 1. The LMU2 is used to connect Cabinets 1
and 2. Signals are transmitted or received via linked cable.