Avaya IP Office Phone Manager, Installation Manual, Page: 39 / 411

IP Office Installation Page 38
15-601042 Issue 20b (16 July 2009) IP Office
2.14 Grounding
Use of ground connections reduces the likelihood of problems in most telephony and data systems. This is especially
important in buildings where multiple items of equipment are interconnected using long cable runs, for example phone
and data networks.
All IP Office control units and external expansion modules must be connected to a functional ground. In some cases, such
as ground start trunks, in addition to being a protective measure this is a functional requirement for the equipment to
operate. In other cases it may be a locale regulatory requirement and or a necessary protective step, for example areas
of high lightning risk.
•
WARNING
During installation do not assume that ground points are correctly connected to ground. Test ground points before
relying on them to ground connected equipment.
The ground point on IP Office control units and external expansion modules are marked with a or symbol. Ground
connections to these points should use a 14 AWG solid wire with either a green sleeve for a functional ground or green
and yellow sleeve for a protective ground.
•
Additional protective equipment
In addition to grounding, additional protective equipment will be required in the following situations. Refer to " Out of
Building Telephone Installations ".
•
On any Digital Station or Phones external expansion module connected to an extension located in another building.
•
In the Republic of South Africa, on all Analog Trunk external expansion modules (ATM16) and on any control units
containing an analog trunk cards (ATM4/ATM4U).