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Difference between revisions of "optiPoint 410/420 FAQ (general)"

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(Power over LAN)
m (Q: Can I run an optiPoint 410/420 with local '''and''' PoE power supply =)
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==== Q: Can I run an optiPoint 410/420 with local '''and''' PoE power supply =====
 
==== Q: Can I run an optiPoint 410/420 with local '''and''' PoE power supply =====
: A: This is not recommended, although the phone will not break. Power class negotiation will not run properly, because the standard required a power-less state for the negotiation (no local power supply). Thus in this case the class will be set to 0 (default).
+
: A: This is not recommended, although the phone will not break. Power class negotiation will not run properly, because the standard requires a ''power-less'' state for the negotiation (no local power supply). Thus in this case the class will be set to 0 (default). If the power negotiation is done first and then the local power supply is connected, the initial negotiated power class will not be changed.
If the power negotiation is done first and then the local power supply is connected, the initial negotiated power class will not be changed.
 

Revision as of 12:04, 16 January 2007

Power over LAN

Q: My oP410/420 phone only supports power class 0 (default). How to setup the corresponding PoE-switch to reserve lower power?

A: Some models of the first oP410/420 phones do not support power negotiation according IEEE 802.3af. For details refer to PoE classes of optiPoint phones. To avoid that the Lan-switch reserves to much Power and cannot support PoE on all LAN ports, the LAN ports should be forced to supply a specified power class. This is normally part of the switch administration.

e.g. Settings for Cisco 3750, 3560, 2970 LAN switches

Q: Can I run an optiPoint 410/420 with local and PoE power supply =

A: This is not recommended, although the phone will not break. Power class negotiation will not run properly, because the standard requires a power-less state for the negotiation (no local power supply). Thus in this case the class will be set to 0 (default). If the power negotiation is done first and then the local power supply is connected, the initial negotiated power class will not be changed.