I am trying to figure out why at our company the 3com 3101 or 3102 phones we use, when NEW out of box will not jump on the network and update, unless they are at a specific physical location.
For example, if I take a brand new phone, plug it in at Building "A", which happens to be physically where the main 3com VCX unit is also located, it will not program or get a DHCP. This building is also where all the servers and the main network stack of core switches is located (including the dhcp windows server).
If I bring the phone next door, to building "B", which has no servers, no dhcp server, etc. It jumps on fine. It has a network stack of it's own and has it's own ip subnet, but it all ties back to the main building "A".
So it really makes no sense - I would think if it had an issue, it would be the opposite, that it should not work on building B.
I know there are mac address entries in the configuration of the 3com super stack, one looks like a 3com entry, so not sure if that's part of it.
Any thoughts as to why a 3com voip phone would be able to get dhcp at the secondary location, but not at the main location, but then once it does and gets it's updates, etc. from the vcx, it's FINE, now you can bring it anywhere in the company and it will jump on fine?