Chapter BST Doorphone Installation | Nortel Networks NN40010-302

Chapter 3 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 BCM 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 Doorphone 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 BCM 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 recommends the ITW LINX MP1A-90-27 secondary protector for this purpose.

Wire and mount a BST Doorphone

1Remove the BST Doorphone’s faceplate.

2Determine if you want a flush or surface mount installation.

For a surface mount:

•Discard the flush mount gasket.

•Verify the correct orientation of the surface mount gasket.

•Thread the wires through the center hole, then through the surface mount bracket.

•Fasten the surface mount bracket at the desired location on the wall.

Figure 1 Surface mount

Surface mount gasket	Main housing
	assembly

Surface mount

bracket Faceplate

BST Doorphone Installation and Configuration Guide