ShoreTel: BB24 and IP Phone Rebooting Continuously

I recently installed a BB24 on to an existing IP265. the BB24 provides PoE pass-through so you can wire it Wall > BB24 > IP265 > PC.

The BB24 and the IP265 worked perfectly separate but when chained together they would endlessly reboot.

The issue was the existing PoE switch didn’t provide enough power per-port to keep them active.

There are two options to fix this:

I only have a single cable run to this location so I installed a power injector and that stabilized it.

So, here’s a table with the phone model, watt requirements and PoE switch class required so you can check your PoE switch capabilities:

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