ISE Magazine, August 2019
ISE ICT SOLUTIONS EDUCATION 58 NGDLCs including ATM and SONET Unfortunately much of the network equipment that has traditionally supported these interfaces does not exist anymore However you can still use existing NGDLC to support your copper connectivity and provide high capacity transport options including Ethernet 10 100Mbps 1Gbps and 10Gbps optical interfaces plus ATM and SONET fiber based connectivity choices Project 2 Migrating from TDM to Ethernet connectivity Deploying contemporary Ethernet centric services from a service providers embedded base of access equipment is challenging enough but modernizing a traditional digital loop carrier system to support fiber based and Ethernet connectivity without cannibalizing existing revenue from copper based legacy services is nearly impossible What network operators need is a fiber fed digital loop carrier system that supports a wide variety of service transport and network connectivity including copper optical Ethernet SONET and even ATM Here is where existing NGDLCs truly shine in supporting modern Ethernet transport and services end to end This includes 10Gbps and 1Gbps Ethernet interfaces toward the core network across interterminal transport and optional for 10 100 Ethernet drops to end users These NGDLCs can support Ethernet interfaces simultaneously with legacy connectivity like DS1 DS3 OC3 and OC12 See Figure 1 Project 3 Support of narrowband while delivering broadband services Service provider networks are evolving to take advantage of new technologies that support users ever increasing demands for bandwidth But change does not happen overnight and legacy telecom services continue to remain an important part of network operations e g P Phone DID DOD DDS 2 wire E M 4 wire E M ISDN etc In many cases both large and small businesses have made big investments in legacy equipment and related processes When the companies expand to new locations or add capacity it often makes sense to continue deploying embedded technologies In fact in some cases government tariffs may regulate that service providers offer services that fall into the legacy category NGDLCs are well suited to meet the demands of all services in todays networks with a clear path to evolving services It is the service providers best choice for Figure 3 1 0 digital cross connect system DCS support Figure 4 TDM Switch replacement to modern softswitches
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