👉 Subdial is a term used in telecommunications to refer to any dialing device that uses a subcarrier (the frequency of which is typically between 30 and 150 MHz) instead of a main carrier. This can be useful for certain applications, such as those involving cellular networks or voice services with high data rates. In telecommunication systems, the "subdial" refers to any device that uses a subcarrier (frequency range from 30 to 150