Difference between revisions of "optiPoint 410/420 FAQ (general)"
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==== Q: My oP410/420 phone only supports power class 0 (default). How to setup the corresponding PoE-switch to reserve lower power? ==== | ==== 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. | + | : 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. [http://www.cisco.com/en/US/products/hw/switches/ps5528/prod_release_note09186a00804cc85f.html|Settings for Cisco 3750, 3560, 2970 LAN switches] | + | e.g. [http://www.cisco.com/en/US/products/hw/switches/ps5528/prod_release_note09186a00804cc85f.html| Settings for Cisco 3750, 3560, 2970 LAN switches] |
==== 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 required 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 required 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.
