Our office has 25-30 Cisco SPA504G IP Phones. Two of the phones, in the same office, will not work at the same time. One of the phones will not work when end user is logged onto their computer. Once they log off of their computer, the phone becomes available. Once that phone becomes available the other phone in the same office becomes unavailable. When they become unavailable the screens say Checking DNS. What could be the issue here?
Hello Terrin and thanks for choosing the JustAnswer.com Phone Systems subcategory of the Electronics category.
This was done already. We thought we were possibly out of IP addresses and the devices were sharing the same address. We expanded our range of addresses and gave those devices static IP addresses. This did not work.
So you have both DHCP automatic addresses and static addresses on your network?
I am not sure of our network configurations. This is what I was told was told was tried after the diagnosis was limited IP addresses causing devices to share same address. After that didn't work I took it upon myself to seek help elsewhere. We tested everything individually. Everything works fine on its own. It's when we try to run them together we have the problem. We checked the ethernet cables, the ports and each phone and computer. It is only happening in this office so we assume its not the network.
Let me check with the engineers (they work remotely and not very fast) and find out what was done and how it was done so that I can give you correct information.
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I will be going over the setup with one of the engineers today. In the meantime, I switched one of the computers to wi-fi connection and that seems to be working. As far as the phone and computer working together. It's a slow connection for the user so it will not work as a long term solution.
So, it looks like we figured it out. Kind of. I rearranged the cables on the switch, plugging them into different ports, and that worked. For one of the computers. The phone and computer are working at the same time. For the other computer and phone I am checking the configurations now. They still can not be on at the same time. I did a factory reset on the phone last week so now I am making sure that I configured it correctly.
Did this setup work properly before?
I'm new here. As far as I know this setup has never worked. The only thing that has worked thus far was changing ports on the switch. I guess I am now making sure that I can get this phone to work with the computer without changing ports on the switch again.
OK.But, know that switching ports may take some stations away from another office.
really? what does that mean? You mean another office's wall jack?
Yes.The number of ports on the switch/router is the total available for the building.If you have more switches/routers you can get more ports.
You were extremely helpful but didn't get me info I needed. At least not before my lagging engineers did. I don't want to discredit you, I know you know your stuff. I guess I wasn't giving you the right information to begin with.
Did you need any more information?How can I help you to give me a better rating so I can be paid (3 or better)?
The other phone in the office still does not work with it's computer. Connected to same wall jack. How come?
No labels. Same configuration in other offices works fine. Just in this office there is a problem.