Design Reference

Chapter 8: Platform redundancy
This chapter includes recommendations to provide a fault-tolerant platform.
Power redundancy
The Avaya VSP 4000 series PWR+ models support dual 54V 1000W Power over Ethernet Plus
(PoE+) AC power supplies. This model supports two external field-replaceable power supplies. You
can install a secondary power supply to provide redundancy and load sharing, and add Power over
Ethernet Plus (PoE+) power budget on PWR+ models.
The 1000 W AC power supplies use an IEC 60320 C16 AC power cord connector. The AC power
cord is in close proximity to the hot-air exhaust, and supports high operating temperatures.
Important:
Avaya recommends that power supplies use the same input voltage. Do not operate the chassis
with power supplies under different input-voltage conditions. The product can function but Avaya
does not support this configuration.
Table 14: Power over Ethernet Plus specifications
Model Maximum PoE+ W Average PoE+ W on 50 port models
Avaya VSP 4850GTS—
PWR+ models
• 855 W with one power supply
• 1855 W with two power
supplies
• 15.4 W (802.3af)
• 17.8 W (802.3at) — One power supply
• 32.4 W (802.3at) — Two power supplies
The VSP 4850GTS-PWR+ can support 802.3af 15.4 W on each port with one power supply
installed. PoE+ power reduces to an average of 17.8 W on each port with one power supply. It can
support 802.3at 32.4 W on each port with two power supplies installed.
Table 15: Power over Ethernet Plus specifications for Avaya VSP 4450GSX-PWR+ model
Maximum PoE+ W Average PoE+ W on 12 ports
Avaya VSP 4450GSX-
PWR+ models
835 W with one power supply 17.8 W or 32.4 W (802.3at) — One power
supply
36 Network Design Reference for Avaya VSP 4000 Series December 2014
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