Summary:Testing ISDN links with pings is fine, but there's another way to do it that ensures your basic ISDN link is functioning. Learn all about this method from Chris Bryant, CCIE #12933. Keywords:ccna, ccnp, isdn, bri, test, call, disconnect, ping, d, b, channel, pass, free, exam, certification Article Body:To earn your Cisco CCNA and CCNP certifications, you've got to master ISDN - and...