A stand-alone switch is sometimes called a Host. It has the central processer, handles the billing, and has most of the trunking. A remote is a switch without a central processer and it has limited trunking and billing capacity. It is connected to a Host switch by either T1s or by some type of higher speed fiber or radio facility. It could be a particular T1 or facility that is causing the problem.
I’m assuming the Siemens will allow detailed call traces to be done. Why not make your test calls while the C.O. tech does call traces. When you hit a failure, maybe the call traces will point to a specific path. Maybe repeated test calls will point to a failure.
Someone asked if the failures seemed to happen at certain times. If they do, maybe the switch has some hourly or quarter hour reports that have some information that would match the time of the failures.
