Rev B
Doc. 6001072
Page 7 of 28
2. MULTIPLE ENTRANCES
An Ovation system controlling multiple entrances consists of three system components:
1. The Ovation Controller
Controllers are located by the entrances they control. They are connected by a 4 twisted pair
cable to the Multiple Interface Unit in the first LIB housing.
NOTE: MUI and Connector Board are integrated into a single board.
2. Line Interface Boards (LIBs)
Each LIB controls up to 12 resident telephone lines (therefore a 55 unit building requires 5
LIBs). Every 10 LIBs (or part thereof) are contained within an LIB housing located by the
telephone junction box inside the building. The LIBs are connected in a chain using 8
conductor flat telephone cables with an RJ45 connector on each end. The first LIB in this stack
is connected to the MUI.
WARNING
The LIB housing is not weather-proof, and MUST be installed inside a building.
3. Multiple Unit Interface
Each controller is connected to the Multiple Unit Interface, which can accommodate up to four
controllers. The MUI is connected to the first LIB in the LIB stack.
NOTE:
Only one controller can be used at a time with this method. This can be avoided by
using a separate LIB stack for each controller. When connected in series with telephone
company lines (for a four-entrance installation, four RJ71C jacks are installed in series for every
12 resident lines), a visitor at each entrance can simultaneously contact residents in the
complex. The disadvantage is the additional cost of separate LIB stacks for each entrance.
Figure 2. Multiple Entrance Sample Installation.