User's Manual

External expansion modules
On expansion modules, the ground point is a 4mm screw located towards the right on the rear
of the module.
On some older modules, the dedicated ground point screw is not present. In those cases, the
top-center cover fixing screw (3mm) can be used as an alternative ground connection point.
A toothed washer should be added to ensure good contact.
Out-of-building connections/lightning protection
The following are the only supported scenarios in which wired extensions and devices outside
the main building can be connected to the B5800 Branch Gateway system. In these scenarios,
additional protection in the form of protective grounding and surge protectors must be fitted.
Warning:
The fitting of additional protection does not remove the risk of damage. It merely reduces
the chances of damage.
Hardware and software installation
66 Implementing the Avaya B5800 Branch Gateway November 2011
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