I am trying to get the Cisco 7912 IP phone to draw power from an IEEE
802.3af compliant netgear FS752TPS switch. However, the phone will not draw power.I have tried making up a crossover cable as per
Has anyone got a cisco phone to draw power from a netgear switch?
Hi Scott,
Cisco IP Phones NOT compliant with IEEE 802.3af:
7960 7940 7910 7912 7905 7902---------------------------------------------
Cisco and Linksys One IP Phones THAT ARE compliant with IEEE 802.3af:
Cisco IP Phones:
7970G 7971G 7961G 7941G 7911GLinksys One IP Phones:
PHM1200
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Hope this helps.
Brad Reese BradReese.Com - Cisco Power Supply Headquarters
Brad,
Thanks for your reply, I have seen your posting below in other searches.
According to the Regulatory Compliance document that comes with the 7912G phone, it quite clearly states:
Warning: "This product must be connected to a power-over-ethernet (PoE) IEEE
802.3af compliant power source or an IEC60950 compliant limited power source."So, unless they are lying then it should work....
Regards,
Scott
Scott,
It appears to be a Cisco Power Detection issue.
voip-info.org - How to use Standard 802.3af POE Injectors w/ Cisco
7940/60 G:-------------------------
The IEEE 802.3af-2003 Power over Ethernet ( PoE ) standard defines terminology to describe a port that acts as a power source ( PSE ) to a powered device ( PD ).
This standard defines how a powered device is detected as well as two methods of delivering PoE to the discovered powered device.
IEEE 802.3af power can be delivered through a PoE capable Ethernet port ( referred to as an end-point PSE ).
In the event that an existing non-PoE capable Ethernet switch is used, a mid-span PSE can be used.
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Cisco IP phones
7970G 7960G 7940G 7910G 7910G + SW 7912G 7905G 7902GCan accept Cisco pre-standard PoE from a card integrated with a Cisco Catalyst switch or a Catalyst in-line power patch panel.
These phones can draw local power from a power cube ( CP-PWR-CUBE-2= ) in addition to a country or regionally specific power cord ( CP-PWR-CORD-xx= ).
Only Cisco IP phones
7971G-GE 7970GSupport IEEE 802.3af PoE.
The Cisco IP phone
7970GSupports both the Cisco pre-standard PoE and IEEE 802.3af PoE.
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Cisco Unified IP Phone 7912G Data Sheet:
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Scott, you may wish to investigate PowerDsine:
Brad Reese Global Cisco Systems Pre-Sales Support
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