Out-of-band

• Beep (sound)
• Ident protocol
• In-band signaling
• Mobile phone
• Motherboard
• Out-of-band agreement
• Out-of-band data
• Out-of-band management
• Out-of-band signaling
• PC speaker
• SMS
• Server (computing)
• Telephone call
• Unix
• Unix-like
• Website
• band (radio)
• falsing
• internet
• man page
• multi-factor authentication
• online
• operating system
• software documentation
• web page