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BST Doorphone installation
The BST Doorphone can be mounted in a standard recessed double-
gang electrical box for flush mounting or surface mounted using the
optional surface mount bracket.
Mount the BST Doorphone at shoulder height (approximately 5 ft.) in
the absence of other specifications, such as compliance with local
handicapped access regulations, if required.
Select a location for the BST Doorphone within 300 m (1000 ft.) of the
Norstar system. This distance can be increased to 780 m (2600 ft.) with
the connection of a Station Auxiliary Power Supply (SAPS) to a BST
Doorphone.
The BST Doorphone is suitable for exposure to weather; however, care
must be taken to ensure holes or recesses provided for the BST Door-
phone are properly sealed to prevent water from entering the wall in
exposed locations. Gaskets are supplied for both flush and wall mount
installations. No gasket is required between the BST Doorphone and
surface mount bracket.
.
Caution: You must install protection devices when wiring between the
BST Doorphone and the Norstar system is routed outside a building,
such as aerial or buried cable.
Protection devices must be installed at each end of the exposed cable.
Nortel Networks recommends the ITW LINX MP1A-90-27 secondary
protector for this purpose.
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