What's happening is that, i have a cisco 1801 with about 5 Vlans, im having problems on my voip vlan, like, 2, 3 days ago, 3 of my phones(2Cisco, 1 Grandstream) started having issues, i can make and receive calls, but i cant hear anything, neither ca...

Hi, i have a cisco 1801 wich is crashing whenever my ISP drops the connection(he does this every 36 hours to change ip address), and i cant figure out why.Im running "Cisco IOS Software, C180X Software (C180X-ADVIPSERVICESK9-M), Version 12.4(6)T6, RE...