Specifications

Diagnostics Chapter 4: ShoreGear Switches
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For example, when 24 IP560 phones are plugged into a switch, the maximum power
requirement could reach 153.6 W (24 phones x 6.4W/phone).
The value in the Maximum column in Table 4-7 is normally a spike – typically
during bootup. During normal operation, phones require less power.
Verify power allocated to the PoE ports matches the switch wattage.
ShoreTel recommends selecting a PoE data switch that has "4 hardware queues" for
Quality of Service (QoS) to ensure that rules can be set up to ensure adequate
bandwidth for VoIP and other critical traffic.
IP560g 4.1 W 7.1 W 3
IP565g 4.2 W 6.9 W 3
BB24 2.9 W 11.5 W (with IP560 connected) 3
Model Idle Maximum PoE Class
Table 4-7 Power usage and class of ShoreTel IP Phones: