Question about Cisco 7940 IP Phone

Inline power problem: cisco ip phone 7941G

Hi,
I am using seven 7941G IP Phones on Catalyst 3750G switch. The problem is that three of my ip phones are not powering up after replugging the ethernet cable to the ip phone. I checked the switch interfaces on these ports and it shows line & protocol down. The same port starts working when i plug the ethernet cable into the PC. Please help me in this regard.

3 Answers

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58 Answers

You need to ensure that each port that has a phone plugged into it is configured with power over ethernet configured switched on.

Posted on Mar 21, 2008

Richard Thomas

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26 Answers

Could be issues with the PoE power source on your switch. Sometimes the PoE components stop working and do not generate voltage on all ports. You could try using a Cisco 48V AC Adapter and see if the phones still display the same issue.

Posted on Dec 05, 2012

Anonymous

I have a problem with my phone

Posted on Oct 11, 2008

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