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IP phone displays No Ethernet

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IP phone displays No Ethernet

Postby chicagotech » Thu Sep 07, 2017 9:32 am

We are in a process to move to IP phone. All Cisco switches work fine except 4503. If we connect the phone to Cisco switch 4503, the phone displays No Ethernet. We don’t use VLAN. Do we need to configure 4503 switch to work? If so, how?
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Re: IP phone displays No Ethernet

Postby chicagotech » Thu Sep 07, 2017 9:33 am

In most cases, No Ethernet is hardware issue. Check the cables, PoE. Perhaps switch port configuration and make sure the speed/duplex are matched.
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Re: IP phone displays No Ethernet

Postby chicagotech » Thu Sep 07, 2017 10:04 am

Thank you for the tip. We find the problem is PoE adapter. If we change different PoE adapter, it works.
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How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com
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