Category:Telephony signals

• Signaling (telecommunications)

0–9

• 2600 hertz

A

• Analog display services interface
• Automatic number announcement circuit
• Automatic number identification

B

• Bearer channel
• Busy signal

C

• Call-progress tone
• Camp-on busy signal
• CCIR (selcall)
• Common-channel signaling
• Common-network interface ring
• Compelled signalling

D

• Dial tone
• Differential pulse-code modulation
• Digital milliwatt
• Digital Private Network Signalling System
• Disconnect tone
• DTMF

E

• E and M signaling
• Edge STP

F

• Falsing
• FXO and FXS

G

• Ground start
• Guard tone

H

• Hook flash

I

• In-band signaling

L

• Line signaling
• Loop start

M

• Metering pulse
• Multi-frequency receiver
• Multi-frequency signaling
• Multiple frequency-shift keying

O

• Off-hook tone
• On- and off-hook
• On-hook
• One-way trunk

P

• Panel call indicator
• Permanent signal
• Precise tone plan
• Proceed-to-select
• Pulse dialing
• Pulse-code modulation

Q

• Quindar tones

R

• Recorder warning tone
• Register signaling
• Reorder tone
• Ringing (telephony)
• Ringing tone
• Ringtone
• Robbed-bit signaling
• Rotary dial

S

• Sender (telephony)
• Separate-channel signaling
• Signal tone
• Signaling protocol
• Signaling System No. 5
• Signaling System No. 6
• Signalling System No. 7
• Signalling System R2
• Simplex signaling
• Single-frequency signaling
• Special information tone
• SS7 probe
• Superframe
• Supervision (telephony)

T

• Telephone hook
• Telephone signaling interface
• TeleZapper
• Template:Telsigs
• ToneScript
• Two-out-of-five code

V

• Voice interface card

W

• Wink pulsing

Z

• Zip tone