Digital Signal 1 (DS1) is a digital signal standard used by telecommunications companies to transmit data over copper cables. It was first introduced in the 1980s and has since become the most commonly used digital transmission format for voice, video, and data communications. DS1 is capable of transmitting up to 24 channels of information at speeds ranging from 64 Kbps (DS0) to 1.5 Mbps (T1), making it an ideal choice for applications such as telephone networks, cable television systems, and internet connections.

The DS1 standard uses time-division multiplexing (TDM) which divides each channel into 64 bits or “time slots” that are transmitted sequentially over a single wire pair or fiber optic line. This allows multiple conversations or streams of data to be sent simultaneously without interference from other signals on the same line due to its high-frequency rate which can reach up to 2 megabits per second depending on conditions such as distance between points being connected etc. The use of TDM also makes it easier for network administrators who need only configure one set of parameters instead of having individual settings configured separately like with analog lines where more manual intervention may be required when setting up phone lines, etc.

Overall Digital Signal 1 provides reliable performance at relatively low costs compared with newer technologies such as SONET/SDH allowing organizations large and small alike access cost-effective solutions when looking at their communication needs whether they are connecting two remote locations together via leased lines or providing broadband services over existing copper infrastructure in urban areas.