Vodavi XTS-IP Installation Manual page 18

1-6
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 MPB2 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-IP 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 MPB2 can only be installed in the MPB slot in Cabinet 0.
»
Add-on Boards: MODU and PMU
MPBE
The MPBE must be used to expand the system beyond the first set of Cabinets 0, 1, and 2. It must
be connected with Link Cable to the LMUE in Cabinet 3.
The MPBE 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 MPBE 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-IP 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 MPBE can only be installed in the MPB slot in Cabinet 0.
»
Add-on Boards: MODU and PMU
XTS-IP - Installation Manual
Product Description
December 2005