Reservationless conferences are a type of telecommunications along with managed ones. A reservationless mode means that you don't have to book a conference with your operator in advance. Operator's presence is not relevant with this type of telecommunication. What you need to do is to get dial-in numbers and entry codes from the operator.

Apart from being a simple-to-use and fully-automated, the reservationless service is instant, secure and anonymous. Anonymous does not mean that you will not know whom you are talking to, but it rather means that your operator will not know the names and number of participants, or the date and time of the conference, or the participant access code. You don't have to submit this kind of information. Those up for a conference just have to call the dial-in number and participant access code and they are in.

With reservationless conference calls, you have to reach the potential conferencees beforehand and supply them with a dial-in number and a code. Then you are to inform them about the exact date and time of the conference meeting. You can do it on-the-fly, if you are sure that they have access to the corresponding equipment. You can easily choose to use reservationless services in your day-to-day business routine, as the dial-in number and entry code you are allocated to are permanent and there is no need to get new ones for each new call.

Reservationless conference calls can be made locally or globally, which involves both short- and long-distance calls. It is phone companies that each of the participants subscribes to that charge fees.

As a rule, there are certain limitations as to the number of participants and duration of a reservationless conference call (usually several hours). The conference begins when the first participant enters it and ends when the last participant leaves the conference space. You choose a dial-in number from the list of numbers offered by the operator that you choose. Though, all conferencees use the same dial-in number, it doesn't mean that one dial-in number is restricted to taking part in one conference at a time. A dial-in number participant can enter other conferences simultaneously with a participant access code serving as a demarcation line.

If you decide to invite one more participant, who was not on the original list, to join the conference, you just dial out to him/her and ask him/her to take part. Also, you can lock/unlock you conference. When it is locked, it means that no one can join it. It can be bad when one of the participants gets disconnected and s/he won't be able to come in touch. If the conference is unlocked, then new participants are welcome.

Moreover, you can make use of an organiser control that gets activated when you press the corresponding button on your phone. It can give you such conference performance enhancements as bolstered security, reducing background noises and helping to control the cost of the conference.

Reservationless conference calls are good for their anonymous and immediate access from any phone, high-quality connections and an uninterrupted around-the-clock access.