[Asterisk-Users] OT: cisco 7960G powered by 3com 3CNJPSE

[John Fraizer]

You need to make sure the polarity is right.  If I'm not mistaken, I think I 
saw someone post that the Cisco cubes had the polarity reversed.

John

stan wrote:
> Is anyone using a 3com 3CNJPSE to power a 7960G?  
> I have a couple of 7960Gs and 3CNJPSEs but no combination appears to
> work.  Both phones work fine with a cisco power cube.  I get a 47.6V
> reading across pins 5 and 8 on the patch cable coming from the 3CNJPSE.
> The network still works through the 3CNJPSE, just no power to the phone
> until I connect the power cube.  Using two straight through wired patch
> cables, 7960G running sip firmware version 6.3.  I've tried different
> patch cables with the same result.  Note this is a G version of the
> phone which I understand is enable to work with 802.3af devices natively
> and hence I believe doesn't require a specially wired patch cable.  I've
> looked for a setting to tell the phone to get power via the network
> without success, is there one?  Any ideas?
> 
> TIA
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