What is a Busy Signal?
A busy signal is a signal which indicates that the telephone number someone is trying to call cannot be reached because the phone is otherwise engaged, or because the circuits are busy, making the call impossible to complete. On many phones, the busy signal takes the form of a distinctive tone, but a busy signal can also be visual, as in the case of a phone designed for deaf or hearing-impaired users. Many people are familiar with the sound of a busy signal, as it differs markedly from the dial tone, the tone which indicates that the phone line is open and ready to be dialed.
In most cases, a busy signal simply indicates that the person you are calling is on the phone. A busy signal will also be heard if the phone is off the hook. In these instances, the signal indicates that there is no technical obstacle to placing the call, but that the call cannot be completed because the phone is in use. In some cases, you can ask an operator to break in, if you are calling in an emergency, in which case the operator will interrupt the call and ask if the subject wishes to take your call.
In other cases, a busy signal means that the circuits are all tied up, so your call cannot go through. This busy signal is usually different from a regular busy signal; it is sometimes called a “fast busy,” because the tones tend to be more rapid, and it is also known as a reorder signal. This type of busy signal is common after a natural disaster, due to combined damage to the phone lines and a high call volume.
In both cases, callers must wait and try their call again if they want to get through. If you get a reorder tone or a message that “all circuits are busy,” you may want to wait several hours, until the peak demand passes and the phone company has a chance to get more circuits operating. Some companies also offer a ringback service, which will try the number until it gets through and then cause your phone to ring, connecting you with the person you wanted to call.
You may also hear a busy signal referred to as a busy tone or an engaged tone. Busy signals are not universal across the world, so if you experience problems using a phone internationally, you may want to ask a local what the different tones mean. Sometimes businesses with their own phone exchanges also have in-house busy signals and reorder tones which differ from those used by the phone company, which is something you should be aware of if you make frequent calls to big companies.
Written by S.E. Smith
