Cisco IP Phones on 3Com 4500

• Mar 14, 2009

• #2

cknipe

MIS

Jul 28, 2005

597

US

I believe cisco uses its own flavor of POE. Is this the only cisco phone on the 4500 that does not work. One of the devices is probably using 802.11af and the other is using 802.3af

 

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• Mar 16, 2009

• #3

Bas1234

Technical User

Dec 10, 2007

6,760

NL

You could try to turn off IGMP snooping on the switch, Cisco uses a "skinny protocol" or something like that.

Also check this.

http://www.3com.com/products/en_US/detail.jsp?tab=features&pathtype=purchase&sku=3CNJVOIP-CPOD

___________________________________________
It works! Now if only I could remember what I did...
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• Mar 17, 2009

• Thread starter
• #4

DeadLiner

IS-IT--Management

Mar 12, 2009

2

MK

We have 20 3Com 4500 on our network. The trick is that one of the 3Com we manage to make him work, but others not. we even try: the switch that work we make a backup of config file to TFTP than change the IP address of vlan in the config file, then we restore via TFTP on the target switch but no efect.
Any clue

Regards.

 

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• Mar 27, 2009

• #5

jdoebling

IS-IT--Management

Jan 11, 2002

41

US

try the 3Com K-base. They usually have this type of problem documented on there support.3com.com

I have not found anything that the 3com switch cant do in terms of basic and STANDARDS based networking function.

When you say the Cisco phone doesnt work, can you be more specific? POE? using injectors or switch power? Phone powers up, but doesnt connect? phone doesnt get a DHCP Address? it will help determine where the phone is at in the little "roadmap" it uses during power up/booting.

 

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