ATM UNI 155 MB/s Interface
Lars-Erik Mickos · 1995
ATM is the backbone network selected by the CCITT to carry the future B-ISDN services. The ATM model consists of three main layers; the ATM adaption layer, the ATM layer and the physical layer. The physical layer is divided into two sublayers; the transmit convergence sublayer and the physical media dependent sublayer. The ATM physical layer can use SDH as a bearer. SDH is the new synchronous telecommunication network chosen to replace and supplement the plexiochronous networks used for telephone multiplexing today. SDH makes it more easy to switch, operate and maintain large communication networks with a very improved control. SDH is intended for transport over optical fiber medias. The most common optical high speed optical fiber types today is optical glass fiber at 1300 nm wavelength in multi- or singlemode . This masters thesis report explains the background to these subjects and presents the construction of a printed circuit card that implements the physical media dependent sublayer at an SDH 155 Mbit/s interface according to the ATM Forum UNI specification. The card is intended to be working in a commercial data communication product.