Optilink was formed to develop a Next Generation Digital Loop Carrier ( NGDLC ) targeted at the Bell System .
Optilink was was partly based on the combination of Telcordia GR - 303 and SONET integrated into a more advanced DLC .
Optilink was formed to develop a Next Generation Digital Loop Carrier ( NGDLC ) targeted at the Bell System and was partly based on the combination of Telcordia GR - 303 and SONET integrated into a more advanced DLC .