justification

See bit stuffing.

74570c11.qxd 9/11/07 12:24 PM Page 271

• NTSC (National Television Standards Committee)
• null
• null modem
• numbering plan administration (NPA)
• Numbering Plan Area (NPA)
• number portability
• Number Portability Administration Center (NPAC)
• Numbers
• numerical aperture (NA)
• NXX
• NXX
• NXX
• Nyquist, Harry (1889–1976)
• Nyquist theorem
• NZDF (Non Zero Dispersion-Shifted Fiber)
• O
• OADM (Optical Add/Drop Multiplexer)
• OAM&P (Operations, Administration, Management, and Provisioning)
• O&M (Operations and Maintenance)
• O-Band (Original Band)
• oblique
• OBRA 93
• obsessive compulsive disorder (OCD)
• obtuse
• OC-192