[Asterisk-Users] POE

[Michael Welter]

Greg Boehnlein wrote:
> On Sat, 28 Aug 2004, Michael Welter wrote:
> 
> 
>>Since the Cisco 79XX phones preceded the PoE standard, they are 
>>different--polarity is reversed.
>>
>>IANAE, but as I understand the PoE devices, there are two types--one 
>>always applies -48VDC to the brown pair while the other senses (as per 
>>the PoE spec.) whether the device at the other end requires power.
>>
>>I'm not willing to risk a $300 Cisco set, so I'm still using the wall 
>>wart.  Is anyone providing LAN power to 79XX phones at a reasonable cost?
> 
> 
> Please see:
> 
> http://www.voip-info.org/wiki-Cisco+POE
> 
> I am using 3Com POE injectors (the Dumb kind) with Cisco 7960s without a 
> problem. You need a special cable that you can build or, you can buy a 
> PowerDSine POE injector and get the following (part PD-PS-401-5/CSCS) 
> which will do the same thing as the cable.
> 

To add to my confusion, the wiki page you referenced says the 7960g 
phones are different from the original 7960.