Difference between revisions of "optiPoint 410/420 FAQ (general)"
The Wiki of Unify contains information on clients and devices, communications systems and unified communications. - Unify GmbH & Co. KG is a Trademark Licensee of Siemens AG.
m (→Q: My optiPoint 410/420 phone only supports power class 0 (default). How to setup the corresponding PoE compliant switch to reserve lower power ?) |
m (→Q: My optiPoint 410/420 phone only supports power class 0 (default). How to setup the corresponding PoE compliant switch to reserve lower power ?: Some text adapted.) |
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==== Q: My optiPoint 410/420 phone only supports power class 0 (default). How to setup the corresponding PoE compliant switch to reserve lower power ? ==== | ==== Q: My optiPoint 410/420 phone only supports power class 0 (default). How to setup the corresponding PoE compliant switch to reserve lower power ? ==== | ||
| − | : A: Some earlier hardware models of the optiPoint 410/420 phones did not support power negotiation feature according to the IEEE 802.3af standard. For details refer to the tables available on the [[PoE classes of optiPoint phones]] page (Refer to ''Device Version'' columns). To avoid that the LAN switch reserves | + | : A: Some earlier hardware models of the optiPoint 410/420 phones did not support power negotiation feature according to the IEEE 802.3af standard. For details refer to the tables available on the [[PoE classes of optiPoint phones]] page (Refer to ''Device Version'' columns).<br/> |
| + | : To avoid that the LAN switch reserves more power than necessary and thus can't be able to feed [[PoE]] to all powered devices connected on its ports, each LAN port should be configured with a specified [[PoE#IEEE 802.3af Power Classes|Power Class]].<br/> | ||
| + | : This is normally part of each Ethernet LAN Switch configuration / administration and should be specifically evaluated product by product.<br/> | ||
e.g. See also [http://www.cisco.com/en/US/products/hw/switches/ps5528/prod_release_note09186a00804cc85f.html Release Notes for the CISCO Catalyst 3750/3560 and 2970 LAN Switches].<br/> | e.g. See also [http://www.cisco.com/en/US/products/hw/switches/ps5528/prod_release_note09186a00804cc85f.html Release Notes for the CISCO Catalyst 3750/3560 and 2970 LAN Switches].<br/> | ||
: Text search: ''Allocating Power to Devices Connected to a PoE Port''.<br/> | : Text search: ''Allocating Power to Devices Connected to a PoE Port''.<br/> | ||
| − | e.g. See also [http://support.huawei.com Huawei Technical Support and Documentation website] (Registration and Login are | + | e.g. See also [http://support.huawei.com Huawei Technical Support and Documentation website] (Registration and Login are mandatory)<br/> |
| + | : for Quidway S-series Ethernet LAN Switches PoE configurations and operations.<br/> | ||
: Text search: ''Remote Power Feeding Configurations'' or ''802.3af+Quidway''. | : Text search: ''Remote Power Feeding Configurations'' or ''802.3af+Quidway''. | ||
==== Q: Can I run an optiPoint 410/420 with both local and PoE Power Supply at the same time ? ==== | ==== Q: Can I run an optiPoint 410/420 with both local and PoE Power Supply at the same time ? ==== | ||
: A: This practice is not recommended, although the phone will not break. Power class negotiation will not run properly, because the IEEE802.3af 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. | : A: This practice is not recommended, although the phone will not break. Power class negotiation will not run properly, because the IEEE802.3af 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. | ||
Revision as of 16:22, 17 January 2007
Power over LAN
Q: My optiPoint 410/420 phone only supports power class 0 (default). How to setup the corresponding PoE compliant switch to reserve lower power ?
- A: Some earlier hardware models of the optiPoint 410/420 phones did not support power negotiation feature according to the IEEE 802.3af standard. For details refer to the tables available on the PoE classes of optiPoint phones page (Refer to Device Version columns).
- To avoid that the LAN switch reserves more power than necessary and thus can't be able to feed PoE to all powered devices connected on its ports, each LAN port should be configured with a specified Power Class.
- This is normally part of each Ethernet LAN Switch configuration / administration and should be specifically evaluated product by product.
e.g. See also Release Notes for the CISCO Catalyst 3750/3560 and 2970 LAN Switches.
- Text search: Allocating Power to Devices Connected to a PoE Port.
e.g. See also Huawei Technical Support and Documentation website (Registration and Login are mandatory)
- for Quidway S-series Ethernet LAN Switches PoE configurations and operations.
- Text search: Remote Power Feeding Configurations or 802.3af+Quidway.
Q: Can I run an optiPoint 410/420 with both local and PoE Power Supply at the same time ?
- A: This practice is not recommended, although the phone will not break. Power class negotiation will not run properly, because the IEEE802.3af 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.
