Hi
So command "power pre-std-detect" doesn't resolve the issue for you? Do you have this problem with all the switch ports? Are you running current SW for your switch? Are you running current FW on the phones?
I'm not too familiar with these phones, but I'm not familiar with any issues like this between them and the 2610 switch. Have you tried manually setting the port mode to MDI or MDIX?
If you have a current FW / SW versions and you have tried manual setting, contact support.