Call-progress Tone

Equipment such as Fax Machine s and Modem s are designed to recognise dial tones and busy tones.

The ITU-T E.180 and E.182 recommendations define the technical characteristics and intended usage of some of these tones.

TYPES

Major ones encountered by the public on a regular basis are listed in bold:

Busy Tone or Busy Signal

Call Waiting tone

Comfort Tone

Conference Call tone

confirmation tone

Congestion Tone

Dial Tone

end of three-party service tone ( Three-way Call ing)

executive override tone

Hold ing tone

Howler Tone

intercept tone

intrusion tone

line lock-out tone

negative indication tone

notify tone

number unobtainable tone

pay tone

Payphone recognition tone

permanent signal tone

preemption tone

Queue tone

recall dial tone

record tone

Ringback Tone or ''' Ringing Tone '''

Ringtone or ''' Ringing Signal '''

second dial tone

special dial tone

Special Information Tone (SIT)

waiting tone

warning tone

EXTERNAL LINKS

Telephone line signalling

World PSTN Tone Database

	APPAREL
	BABY
	BEAUTY
	BOOKS
	CAR TOYS
	CELL PHONES
	DVD'S
	ELECTRONICS
	GOURMET FOOD
	GROCERIES
	HEALTH & PERSONAL
	HOME & GARDEN
	JEWELRY
	MUSIC
	MUSIC INSTRUMENTS
	OFFICE PRODUCTS
	SOFTWARE
	SPORTING GOODS
	TOOLS & HARDWARE
	TOYS
	VIDEO GAMES
	SHOPPING HOME

	MORE SHOPPING...

Information About

Call-progress Tone