User's Manual

• Cables of different types, for example trunk lines, phone extensions, ground and power
connections, should be kept separate.
• All cabling between buildings should be enclosed in grounded ducting. Ideally this ducting
should be buried.
• A Primary Protection Box must be provided at the point where the cables enter 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.
Connection type Protection device type Requirement
DS phone extensions
External expansion module
DS ports only.
ITWLinx towerMAX DS/2
Supports up to 4 connections.
(This device was previously
referred to as the Avaya
146E.)
• Connection from the
expansion module to the
phone must be via a surge
protector at each end and
via the primary protection
point in each building.
• The expansion module,
control unit, and IROB
devices must be connected
to the protective ground
point in their building.
• The between building
connection must be via
earthed ducting, preferable
underground. The cable
must not be exposed
externally at any point.
Analog phone extensions
Phones external expansion
module (POT or Phone)
ports only.
Barrier box
Supports a single connection.
Maximum of 16 on any
expansion module.
Analog trunks ITWLinx towerMAX CO/4x4
Supports up to 4 two-wire
lines. (This device was
previously referred to as the
Avaya 146C.)
For installations in the
Republic of South Africa, the
fitting of surge protection on
analog trunks is a
requirement.
For other locations where the
risk of lightning strikes is felt to
be high, additional protection
of incoming analog trunks is
recommended.
Out-of-building connections/lightning protection
Implementing the Avaya B5800 Branch Gateway November 2011 67