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1.7.3 Suministro de energía de respaldo
The use of an Uninterrupted Power Supply (UPS) with any telephone system is strongly recommended. Even at sites that
rarely lose electrical power, that power may occasionally have to be switched off for maintenance of other equipment. In
addition, most UPSs also provide an element of power conditioning, reducing spikes and surges.
The capacity of UPS systems and the total equipment load the UPS is expected to support are usually quoted in VA. Where
equipment load is quoted in Watts, multiply by 1.4 to get the VA load.
The calculation of how much UPS capacity is required depends on several choices.
· What equipment to place on the UPS?
Remember to include server PCs such as the voicemail. It is recommended that the total load on a new UPS is
never greater than 75% capacity, thus allowing for future equipment.
· How many minutes of UPS support is required?
Actual UPS runtime is variable, it depends on what percentage of the UPSs capacity the total equipment load
represents. For example, a 1000VA capacity UPS may only support a 1000VA (100%) load for 5 minutes. This
relationship is not linear, the same UPS would support a 500VA (50%) load for 16 minutes. Therefore the lower the
percentage of capacity used, the increasingly longer the UPS runtime, typically up to 8 hours maximum. Remember
also that for most UPS's the ratio of discharge to full recharge time is 1:10.
· How many output sockets does the UPS provide?
Multiple UPS units may be required to ensure that every item of supported equipment has its own supply socket.
The web site
http://www.avayaups.com
on a UPS. It will then display various UPS options. The site uses VA values for typical IP Office systems. However, if more
specific values are required for a particular system, the table below can be used to enter values.
Typical IP Office System
IP500v2 System
Individual Equipment
Analog 16 Module
Digital Station 16 Module
Digital Station 30 Module
Phone 8 Module
Phone 16 Module
So8 Module
· The 1151D2 power supply unit for Avaya H.323 IP phones includes a backup battery. This typically provides 15 minutes
backup at maximum load (20 Watts) and up to 8 hours at light load (2 Watts).
IP Office Standard Version Instalación
IP Office 7.0
provides a calculator into which you can enter the equipment you want supported
VA
Typical IP Office System
230
IP500 System
VA
Individual Equipment
88
Phone 30 Module
34
Typical Server PC
42
Typical Desktop PC
17
Mid Span PSU - 6 ports
23
Mid Span PSU - 12/24 ports
34
VA
230
VA
42
600
400
150
300
15-601042 Número 23a (06/10/2011)
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