Signalling

Dual Tone Multi Frequency

Dual Tone Multi Frequency 0

Dual Tone Multi Frequency 1

Dual Tone Multi Frequency 2

Dual Tone Multi Frequency 3

Dual Tone Multi Frequency 4

Dual Tone Multi Frequency 5

Dual Tone Multi Frequency 6

Dual Tone Multi Frequency 7

Dual Tone Multi Frequency 8

Dual Tone Multi Frequency 9

Dual Tone Multi Frequency A

Dual Tone Multi Frequency B

Dual Tone Multi Frequency C

Dual Tone Multi Frequency D

Dual Tone Multi Frequency Pound

Dual Tone Multi Frequency Star

Multi-frequency

Multi-frequency 0

Multi-frequency 1

Multi-frequency 2

2600 hertz

Multi-frequency 3

Multi-frequency 4

Multi-frequency 5

Multi-frequency 6

Multi-frequency 7

Multi-frequency 8

Multi-frequency 9

Multi-frequency KP

Multi-frequency KP2

Multi-frequency ST

Multi-frequency ST2

Multi-frequency ST3

Special Information Tone

Special Information Tone - Future Use

Special Information Tone - Intercept

Special Information Tone - Ineffective/Other

Special Information Tone - No Circuit - intraLATA *****

Special Information Tone - No Circuit - interLATA *****

Special Information Tone - Reorder - intraLATA *****

Special Information Tone - Reorder - interLATA *****

Special Information Tone - Vacant Code

Repeating Special Information Tone

Progress Signaling

Busy Signal

Reorder Tone

Off hook tone