phones rebooting every 7 days around the same time

[mattyboy]

Have 3 5330e phones plugged into a Meraki 350-48FP.  the phones reboot very close to or exactly at the end of their dhcp lease

3300 release 5.0sp2 

logs indicate heartbeat server lost connection

network people swear this switch is setup just like other meraki in the network which don't have issue

will try and set a  phone to static to see if dhcp problem

any other thoughts?  sip alg settings or ICMP settings in the switch that might screw with the phones?

Thanks

[sunspark]

I had a problem like time few years..
For me, It was my switch plugged to electric inventer( programmed to reboot every sunday...)

[martyn]

What does the Meraki dashboard show as happening when they reboot? It should give a pretty good indication if it is the switch/switchport that is going down, or the handset.