FC1483(AAL5多协议封装技术规范),

RFC1483描述了网络上承载无连接网络互连业务（即路由和桥接的协议数据单元PDU）的两种不同方法。

第一种方法允许在一条ATM虚电路上复用多个协议，这时需要在传统的PDU前加上IEEE 802.2逻辑链路控制（LLC）信头，以此来标识所传送的PDU的协议，这种方法称为LLC封装。

第二种方法是一个高层协议由一条ATM虚电路来承载，这种方法称为基于VC的复用。

RFC1483描述了ALL5的业务特定汇聚（SSCS）为空时，在AAL5的公共部分汇聚（CPCS）上承载路由和桥接PDU的方法

-FC1483 (AAL5 Multiprotocol encapsulation specification),

RFC1483 describes the network carrying connectionless network interconnect services (ie, routing and bridging protocol data unit PDU) are two different ways.

The first method allows an ATM virtual circuit multiplexing of multiple protocols, then the PDU needs to be added before the traditional IEEE 802.2 Logical Link Control (LLC) header, in order to identify the PDU sent by the agreement, this is known as LLC encapsulation.

The second method is a high-level agreement was signed by an ATM virtual circuit to the load, this method is called the VC-based multiplexing.

RFC1483 describes ALL5 business-specific aggregation (SSCS) is empty, the public part of the convergence in the AAL5 (CPCS) PDU is hosted on a method of routing and bridging