EIEIO

The chorus of “Old MacDonald Had a Farm,” which has nothing to do with telecommunica-

tions, unless perhaps Old MacDonald had a telephone on the farm. The song mentions only a chick (cluck-cluck), cow (moo-moo), duck (quack-quack), pig (oink-oink), horse (neigh-neigh), and various other barnyard animals. It would be easy enough, however, to equip Old MacDonald with a telephone with a ring-ring here and a ring-ring there.Those who use cell phones and downloadable ring tones are advised to sing another song.

• n (nano-)
• NNI (Network-to-Network Interface)
• NN (Network Neutrality)
• NOC (Network Operations Center)
• node
• noise
• nominal
• non-blocking
• non-deterministic
• non-dialable toll points
• non dispersion-shifted fiber (NDSF)
• non-facility associated signaling (NFAS)
• non-line-of-sight (NLOS)
• nonpersistent carrier sense multiple access (Nonpersistent CSMA)
• Nonpersistent CSMA (Nonpersistent Carrier Sense Multiple Access)
• non-real-time (nrt)
• non real-time variable bit rate (nrt-VBR)
• non-repudiation
• non-return-to-zero (NRZ)
• non-wireline carrier
• non-wireline carrier
• Nordic Mobile Telephone (NMT)
• Nordic Mobile Telephone (NMT)
• normal
• North American Numbering Council (NANC)