The 3C17708 3Com 200W AC modular power supply in the 3Com Switch 4050 and
Switch 4060 is hot-swappable and provides load sharing and power
redundancy for the unit. For an even greater degree of reliability in
business-critical Gigabit backbone configurations, you can install this
second power supply in the switch to achieve added redundancy. Modular
design simplifies servicing. Please let us know if you have any questions regarding the 3Com 3C17718 4060 switch power supply.