What does beep beep sound mean in call?

A beep beep sound during a phone call refers to one or more short, high-pitched beep tones that can be heard by the calling party. These beeping noises are audible signals generated by the telephone network to indicate certain events or issues on the call.

Beeps may occur due to call waiting, conference calls, voicemails, dual-tone multi-frequency (DTMF) tones, network problems, fax machines, modems, or other factors. The specific meaning of the beep tone can vary based on the context, phone carrier, location, and other technical details of the call.

In general, these beeping sounds serve as a form of notification to let the caller know something is happening on the line. By understanding what the different beep patterns signify, callers can better interpret the status of their phone call.

Call Waiting

Call waiting is a feature that allows you to receive another call while already on a call. When someone calls you while you’re already in a call, you will hear a beep sound through the earpiece to indicate an incoming call is waiting.

The beep acts as a notification to let you know there is a new incoming call. This allows you to put the existing call on hold and answer the new call if you choose. The beep sound heard during a call only indicates that there is another incoming call, not who is calling.

Call waiting is enabled by default on most smartphones, including iPhones and Android devices. You can turn off call waiting in the phone app settings if you do not want to be notified of incoming calls while already on a call. However, this will send all calls directly to voicemail when you are already in a call.

Conference Calls

Conference calls allow multiple participants to join a call at the same time. This is useful for meetings, webinars, or other discussions between people in different locations.

On a conference call, participants may hear a beep tone when someone new joins or leaves the call. This beeping noise signals that the roster of people on the call is changing. For example, if you hear a single beep, it likely means that someone new has just dialed into the conference line. If you hear a double beep, it probably indicates that a participant has left the call.

The beeps help notify everyone on the call when the group expands or shrinks. This allows the moderator or host to confirm who is present, and helps participants understand who they are interacting with at any given moment during the discussion. The audible beep tones on entry and exit are standard features of most conference calling services.

According to this Phone.com support page, the beeps are part of their conference call platform’s design to indicate when the roster changes.


Voicemail is a feature offered by phone carriers that allows callers to leave a recorded audio message when the recipient does not answer their phone. When calling someone who has voicemail enabled, you may hear a beep tone in between the rings. This beep indicates that the call has gone to the recipient’s voicemail system.

The beep tone serves two purposes in voicemail. First, it signals the start of the recording period, letting the caller know they can begin leaving their message after the tone. Second, it indicates the end of the recording time, typically after 2-3 minutes. After the end-of-recording beep, the voicemail system will automatically hang up the call.

So in summary, hearing a single beep when calling someone means you’ve reached their voicemail. The beep allows you to record a voice message for them which they can retrieve and listen to later. It marks the start and end of the recording time allotted by their voicemail service (Source).

DTMF Tones

DTMF stands for dual-tone multi-frequency signaling and refers to the system that generates the tones you hear when pressing buttons on a telephone keypad. Each button is assigned a specific frequency that plays when pressed. For example, pressing the “1” button generates a 697 Hz tone mixed with a 1209 Hz tone.

These DTMF tones allow you to send information over a phone line by pressing keys. For example, when you call a company and are prompted to “press 1 for sales, press 2 for support,” you are entering information using DTMF tones. The system detects which keys you press based on the tones generated.

The “beep beep” tones heard during a call indicate that a button has been pressed to enter information. For example, you may hear two beeps when activating call waiting to switch between calls. Or when leaving a voicemail, pressing buttons on the keypad to navigate menus generates beeps. The beeps confirm a button press and entry of the associated DTMF tone. So in summary, the beeps allow you to audibly follow along as DTMF tones are sent over the line.




Network Issues

Beeps during a phone call can indicate there are network problems or the call is being disconnected. This often happens when there is interference on the line or a temporary loss of signal. The beep acts as an audio cue that the network connection has been interrupted.

On landlines, network beeps during a call typically mean there is a problem with the phone line itself. This could be due to factors like damage to the physical line, moisture in cables, or issues at the junction box. The beeps occur when the analog signal is temporarily lost.

For mobile networks, beeps can signal that the call is being transferred between cell towers. As you move locations, your phone switches to utilize the nearest cell tower. But if coverage is spotty, the handoff between towers may not be seamless, causing beeps. Network congestion can also lead to beeps as many users compete for bandwidth.

Beeps on VoIP phone systems can indicate packet loss. VoIP calls convert voices to digital packets sent over the internet. But network lag or congestion may cause some packets to be lost. The result is short beeps or choppy audio as the call struggles to maintain the connection.

If you regularly hear beeps during calls, it likely points to an underlying issue with your phone line or mobile/VoIP network that should be addressed. Contacting your service provider can help diagnose and resolve persistent network problems causing call beeps.

[Cite: https://www.blackfoot.com/news/faqs/im-hearing-strange-beeps-on-my-phone-line-what-are-they/]

Fax Machines

Fax machines use distinct beep tones to facilitate communication between two fax machines over a phone line. When a fax connection is initiated, the calling fax machine will dial the receiving fax number. Once answered, the calling machine will emit a calling tone, typically a repetitive beep every 3 seconds. This signals to the receiving fax machine to start the “handshake” process and establish a connection.

The receiving fax will then respond with an answering tone, usually a series of short beeps at half second intervals. This confirms that both machines are live and ready to begin transferring the fax data. At this point, the fax machines will go through several back and forth exchanges, emitting beeps and tones to negotiate the connection speed and begin the fax transmission.

The series of beeps and tones allows the two fax machines to understand each other and set up the call properly before sending the fax. Without this “conversation”, the fax transmission would fail. So in summary, the beeps are a critical part of the fax communication process.

Source: Sound Ideas, FAX, BEEP – Soundeffects Wiki – Fandom


Modems were essential for accessing the internet in the early days before broadband connections became widespread. They used analog telephone lines to convert digital computer signals into audible tones that could be transmitted over phone lines. This resulted in the characteristic beeps, screeches and warbling sounds heard when connecting to dial-up internet.

Some common modem sounds included:

  • The “handshake” tone – a high pitched screeching noise when the modem connected to another modem.
  • Dialing tones – beeps corresponding to the DTMF tones as the modem dialed the phone number.
  • The “connect” tone – a continuous warbling sound once the modems established a connection.
  • “Carrier tones” – shifting frequencies transmitted while data was being sent.

These audible tones allowed early modems to turn digital data into sound that could travel through analog phone networks. While no longer necessary with today’s broadband connections, the blips and beeps of dial-up modems remain an iconic memory of the early internet era.

Source: https://www.popularmechanics.com/science/a29611456/internet-dialup-modem-sounds/


Teletypewriters, also known as teleprinters or teletypes, are electromechanical typewriters that can communicate typed messages from point to point through simple electrical connections. They were an early form of communications technology used from the late 19th through to the late 20th century.

On teletypewriter devices connected via analog telephone lines, beeps were used to transmit information in place of the clicks produced by typing letters on the keyboard. Different combinations of beeps corresponded to different letters and symbols. This allowed messages to be transmitted over long distances using audio frequencies.

Modern text terminals and terminal emulators sometimes include an option to enable beeps in place of typed characters as a nod to the legacy teletypewriter devices. For example, on Linux operating systems, the console TTY can be configured to produce a beep for each character typed at the command prompt. This can serve as a simple alert when no monitor is connected.


In summary, beep tones during a phone call can have different meanings depending on the context. A single beep is often an engaged tone indicating the line is in use. Multiple beeps generally signify call waiting or a conference call. Long beeps can mean you’ve reached voicemail or a fax machine. High pitched or intermittent beeps may point to network issues. While beeps can be frustrating, understanding what they represent helps diagnose problems and determine next steps.

The most common beep tones signify call waiting, voicemail, busy signals, and conference calls. But beeps may also indicate connection issues, fax machines, teletypewriters, or other legacy technologies still on the network. When troubleshooting, take note of the beep’s length, pitch, and pattern. This can provide clues to pinpoint the exact meaning. With experience, phone users can learn to interpret key beeps during calls to avoid confusion and wasted time.

In the end, beep tones serve a purpose even if they can be annoying. Becoming familiar with common beep meanings helps phone users navigate calls more effectively. A little knowledge goes a long way to smooth out needless frustrations on the phone.