Patent ID: 7664053

Claim:
A method for implementing multicast using a slave block in Digital Subscriber Line (DSL) access technique, comprising: cascading a master block and at least one slave block in a DSL access apparatus via an internal interface so as to allow for commmunicating between the master block and the at least one slave block using an internal protocol, wherein the master block connects with a first DSL user via a first Remote Terminal Unit (RTU) and the at least one slave block connects with a second DSL user via a second RTU; configuring each of the master block and the at least one slave block to support any one of an Internet Group Management Protocol (IGMP) proxy and an IGMP snooping, to enable both the master block and the at least one slave block implement respective multicast functions independently and in a parallel way; configuring configuration data of both the master block and the at least one slave block in the master block to make both the master block and the at least one slave block be centralized management, the configuration data of the at least one slave block comprising at least one of a multicast protocol parameter of the at least one slave block and multicast member data of the at least one slave block; and wherein the multicast protocol parameter comprises an IGMP multicast function switch, a general group query interval, a general group query response time, and a robustness coefficient, and the multicast member data of the at least one slave block comprises xDSL interfaces corresponding to multicast members.