Thanks to all who replied. I got a copy of IPC-2222, and it looks like just what I needed. Sure enough, the CM wants about half the copper the IPC spec allows. We'll have to do some "negotiating." =============================================================== Gary Thompson email: gary@xxxxxxxxx Agere Systems phone: (512) 821-6521 Processing, Aggregation, and Switching mobile: (512) 751-8115 FAX: (512) 821-6810 =============================================================== ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu