We've got 2 switches in one of our offices, we recently installed IP Telephonny in this office. For the first few weeks, they were using our main office server as pstn, last week we installed them a local pstn, since then the phones randomly disconnect and reset without any warning or message...
We already have few other offices with the same configuration withour ever any problem. I am attaching my 2 switches config... I'm sure something is wrong but I can't see it.
on the 3750:
ports 1 - 2 redundant wan connection
ports 3 - 4 redundant pstn (4 actualy NC and Shutdown)
ports 6 - 10 Servers and other HW
11-24 Workstations and IP Phones
All IP Phones and workstations
they are both linked with a 1Gb SFP