Out Of Building Telephone Installations; Irob Installation - Avaya IP Office 3.0 Installation Manual

Small Office Install

Out of Building Telephone Installations

Installation of telephones that are external to the building housing the Avaya IP Small Office Edition or in
another building require In-Range-Out-Of-Building (IROB) protectors to protect the control unit and
device from electrical surges. Only Digital Stations should be used for out of building/external
telephones. Two IROB protectors are required.
The following diagram provides an overview of the protection requirements for installation of telephones
that are external to the building housing the Avaya IP Office. Details of these requirements are given in
the following paragraphs:
A Primary Protection Box must be provided at the point where the cable enters the building. This should
be three-point protection (tip, ring and ground). Typically this would be gas tube protection provided by
the local telephone company. The ground wire must be thick enough to handle all the lines being
affected by indirect strike at the same time.
CAUTION: All cabling between buildings must not be exposed. E.g. cabling between buildings must be
carried in suitably earthed ducting; ideally underground.
The following IROBs must be used:
146E - TDL - SAP code 407568161
Installation of a Contact Closure Adjunct controlled device outside the building requires a 146G Surge
Protector – SCL/8 to protect the control unit from electrical surges.

IROB Installation

Install the 146E IROBs as per the instructions supplied with the IROB. Typically this would be as follows:
Small Office Edition Installation Manual Page 20
IP Office 3.0 40DHB0002UKED Issue 3 (4th February 2005)