Miscellaneous Interface Unit (Misu) Installation; Talk Battery - Vodavi Starplus Triad 1/2/3 Installation Manual

Miscellaneous Interface Unit (MISU) Installation

Miscellaneous Interface Unit (MISU) Installation
The Miscellaneous Unit (MISU) contains two External Music Sources
(MOH/BGM), an External paging port, and four dry contacts. Optionally,
the MISU is equipped with two serial interface ports by installing the
Serial Interface Unit (SIU) daughter board. The SIU should be installed if
more than two serial communication devices are to be connected to the
system. If required, install the SIU as shown in
When using CO Lines as additional music inputs, keep in mind that the
music source may require a talk battery in series with either TIP or Ring.
This talk battery boosts the signal level sufficiently so that the CO Line
interface can read the signal.
The MISU consists of:
KSU
Figure 2-13: Talk Battery
The MISU should be inserted into slot #7.
Use extra care when removing RS232 cables from the MPB or SIU boards.
Hold the MPB/MISU card in the card slotbefore removing the RS232 cable.
Failure to perform this action may result in the MPB/MISU card being
pulled from its' slot.
The External page ports are provided from the amphenol connector
on the front edge of the MISU. These ports are connected to
transformers, providing a 600 ohm impedance.
Music inputs are provided from the amphenol connector on the front
edge of the card.
Four independent relay contacts are provided through the amphenol
connector on the front edge of the MISU. These contacts are
controlled by software from entries in the system database. Control
signals are sent by the MPB. The output drives the relay coils,
controlling the state of the 1 amp, 24V relay contacts.
Talk
Battery
Figure 2-14.
Music Source
2-29