- Wired Metropolitan Area Transmission Services
The Wired Metropolitan Area Transmission Services support physical transfer of data, point-to-point or point-to multipoint, using medium to high capacity wired transmission medium over distances spanning tens of kilometres (e.g. 5 to 50 km). Examples of transmission media are copper leased lines and optical fibre. The capabilities of these services are defined by the characteristics of the transmission media, which enables wavelength-based multiplexing and switching, seamless transport of ATM, Ethernet, etc. Examples of Wired Metropolitan Area Transmission Services, associated with the supporting technology employed, are Dense Wavelength Division Multiplexing (DWDM), Synchronous Optical Networking (SONET), Synchronous Digital Hierarchy (SDH), Distributed-Queue Dual-Bus (DQDB), and Plesiochronous Digital Hierarchy (PDH).
- Wired Transmission Services