Ken, Couldn't come across a 2511 in my search. There is an IPC-6011. That's the closest I could come. Maybe someone else knows more. If you can, look at the IPC web page at www.ipc.org, they should have a total listing of all documents. >>> Ken Barrett <[log in to unmask]> 09/03/97 01:19am >>> Does anyone out there know anything about IPC-2511 ? Thanks, Ken Barrett Cisco Systems ELB San Jose CA