Multi-rate symmetric digital subscriber line
（重定向自MSDSL）
Multi-rate symmetric DSL (MSDSL or MDSL) is a proprietary, non-standardized symmetric digital subscriber line technology with a maximum distance of 29,000 feet (8,800 m). It is capable of multiple transfer rates, as set by the Internet service provider, typically based on the service and/or price. Eight data rates are available, ranging from 160 kbit/s to 2.32 Mbit/s.