Matrix N-Series DFE
SecureStack C3, C2, B3, B2, A2
Attached an IP Phone (for example, Siemens Optipoint 4000) to a "
The host unit's Power over Ethernet (PoE) is not powering up the phone, though both devices support PowerDsine pre-802.3af-standard power detection.
The IP Phone PoE client is one example of a pre-802.3af-standard device which uses the spare pairs (4-5 / 7-8) for power.
The above-stated Enterasys products use the data pairs (1-2 / 3-6) to supply power, as do most modern-day switches.
The 802.3af standard states that the device receiving power should be able to receive power using either method. The IP Phone doesn't support this as it is pre-standard.
The Enterasys products do have a PoE detection mode capability (default = '
set inlinepower detectionmode auto
Functions as Designed (FAD).
Workaround: Use a pre-standard mid-span PoE source, or an external power supply, for the IP Phone.