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Last reply by 02-05-2019 Unsolved
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1268

N1548P Poe not working with old Cisco IP Phones

 
Please help, because I'm running out of ideas.
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1236

Hi,

From what I can tell the pinout for PoE is different on the 79xx from the 3905, so it may not be compatible with the pins that are providing power. https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/7960g_7940g/7_0/sip/english/administratio...

https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/3905/10_0/english/admin_guide/IP05_BK_A6E...


Thanks,

DELL-Josh Cr
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Dell Technologies | Enterprise Support Services
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1150

Thanks for the answer.

I forget to mention that all the problems happened after a reboot. Before that, both types of phones was working OK.

I think it's a PoE controller problem. It's weird that all ports are in "Test-Fail" status, even when all 3905 phone are working OK.

What do you think about it?.... Do you have any other ideas?

 

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