Design Faqs Multiserice Router Colck Circuit Design Challenges

摘要

Multiservice routers and switches are network devices that support multiple switching and routing protocols, typically adding Multiprotocol Label Switching (MPLS) and Asynchronous Transfer Mode (ATM) switching to basic Internet protocol (IP) routing services (see the figure). From an IT-services (information technology) standpoint, that means transparently supplying analog voice, fax, and Voice-over-IP (VoIP) capabilities simultaneously with basic data services. From a hardware standpoint, it implies autosensing services such as various high-speed versions of Ethernet SONET, Fibre Channel, T1/E1, and older modes. It also suggests a considerable challenge extracting clock and data signals from all those inputs.