…-directional Line Switched Rings (BLSR) traffic. Additionally, an on-board SONET switch matrix provides STS-1 granularity for grooming at POP hand-off points. Two 10G SONET/SDH ADM cards can be mated in a shelf to function as a linear or ring SONET node capable of providing 1+1 or BLSR/MS-SPRING overlaid sub-networks…

…connection-level, end-to-end reroute restoration; 4F Virtual Line Switched Ring (VLSR®), intelligent version of 4F BLSR/MS-SPRing; Asymmetric VLSR; 4F TLSR; 2F BLSR/MS-SPRing; 4F BLSR/MS-SPRing; APS/MSP (1+1, 1:N) and unprotected (0+1); UPSR/SNCP Timing Support 1.544 Mb/s/2.048 Mb/s BITS/Station Clock…

…is the only long-distance carrier with a four-fiber, bi-directional, line-switching ring topology (four-fiber, BLSR) installed from coast-to-coast, and from border-to-border. Four-fiber BLSR allows customers on Sprint?s SONET network to survive network outages and fiber cuts in milliseconds – literally…

…synchronization CP provides DS1/E1/2 MHz-clock timing reference with sync status messaging Protection Options Optical Protection: O-UPSR, O-BLSR SONET 1+1 APS, SONET BLSR Performance Monitoring SONET/SDH Tributary side CV-S, ES-S, SES-S, SEFS-S, CV-L, ES-L, SES-L, VAS-L, FE-L SONET/SDH Line side CV-S, ES…

…a mix of FC, GbE, and OC-n Configurations Point-to-point or across long-haul Timing/Synchronization Tributary, line, external Protection Options O-BLSR (shared protection) O-UPSR (dedicated protection) External SONET/SDH client protection Performance Monitoring SONET/SDH Tributary side CV-S, ES-S, SES…

…restoration; 4F Virtual Line Switched Ring     (VLSRTM), an intelligent version of 4F BLSR/MS-SPRing; Asymmetric VLSR;     4F TLSR; 2F BLSR/MS-SPRing; 4F BLSR/MS-SPRing; APS/MSP (1+1, 1:N)     and unprotected (0+1); UPSR, SNCP Network Management…

…(conversion), DWDM Optical Ring Protection Options Facility protected (fiber cuts), Equipment and facility protected (Optical UPSR, Optical BLSR), SONET 1+1 SONET BLSR/SDH MS-SPRING Timing / Synchronization External synchronization CP provides DS1/E1/2-MHz clock timing reference with sync status messaging…

…-directional Line Switched Rings (BLSR) traffic. Additionally, an on-board SONET switch matrix provides STS-1 granularity for grooming at POP hand-off points. Two 2.5G SONET/SDH ADM cards can be mated in a shelf to function as a linear or ring SONET node capable of providing 1+1 or BLSR/MS-SPRING overlaid sub-networks…

…International BIOS Basic Input/Output System BIP Bit Interleaved Parity BIT Built-In Test BITS Building Integrated Timing System bits/sym Bits per Symbol BLSR Bidirectional Line Switched Ring BML Business Management Layer BNC Bayonet Neill-Concelman BOC Bell Operating Company BOL Beginning of Life BOM Bill…

…,000 times faster than today?s Internet. IXC?s network also supports ATM and frame relay technologies for advanced data services. IXC?s four fiber BLSR (SONET ring technology) systems exceed 99.999% availability, and the network is monitored by one of the most modern computerized systems in the industry…