PT-60 3516 equipment is a multi-service integrated optical transmission equipment based on SDH technology, integrated SDH access function, PCM (64K service) function, digital cross-connect equipment, IPPBX program-controlled switching. The PT-60 3516 uplink interface supports standard STM_1\4\16\64 optical access and E1 electrical port access, and the branch side supports SDH access, PDH access, PCM access, Ethernet access, and program-controlled switching. Incoming, IP SIP access; able to meet the power distribution network intelligence, industrial automation, transportation, railway and other private network users and operators large customers access to different bandwidth and a variety of service interface types. The PT-60 3516 is mainly used in the backbone network and access network, providing various service ports and large-capacity transmission functions.