we use seb's (1000's of them) to track customers for critical alarms.. they work, the newest are netpath seb by techtronics.. but those are on site.. if your working on a budget, a central server dialing each switch and doing a prt history would work UNLESS you need to know the minute a switch drops... 99 percent of our customers call way before our seb dispatch team can get a tech into the field..
they work great for non out of service as well... i can down a pri and usually hear rmats hit the inbound modem about the time i'm doing the enll command...
john poole
bellsouth business
columbia,sc