Hi.

I used to run a Swissvoice CP2505G VOIP phone directly connected to a FritzBox 7490. The setup worked fine. To power the phone via POE I placed the SG2008P in between. Since then, the phone only sporadically registers at the FB. Registration works after a reboot of the FB and is kept for a couple of minutes. Then the phone status shows timeout. It tries to re-register every 30s but this only works every once in a while. There are some hours of timeout in between and when it was able to register, it runs into the timeout again after a short time. When I plug the phone back to the FB it immediately continues to work. So, I assume the switch to be the problem. It is controlled by Omada 5.8.4. 

Phone and FB are in the same VLAN and can ping each other. LLDP-MED is activated for this VLAN. I have tried to change the registration expiration period but it didn't help.

Any ideas?

Thanks for your help.

Martin