Common ADSL protocols

①. 1483B: refers to the 1483 bridging protocol. This function is implemented based on the Basic bridging protocol and on the first layer of the network physical layer, when this solution is used, the MODEM only acts as a bridge device and does not provide any protocol conversion or address filtering functions. Generally, after the MODEM can be synchronized with DSLAM and the VPI/VCI is set, basically, users can access the Internet. In short, MODEM serves only the same functions as HUB. In this solution, there are also several network solutions, in this mode, you can assign a fixed IP address, subnet mask, and default gateway to the ISP, the address information on the MODEM that does not support the NAT Function must be configured on the user's PC), and The PPPoE dial-up mode MODEM can also use the 1483B method, third-party dialing software is installed on the user's PC). However, the 1483B + NAT, 1483B + DHCPclient feature in the leased line mode must be used in many places, the WAN port of the MODEM can dynamically obtain the IP address, which can reduce ISP management ).

②. 1483R: refers to the 1483 route mode. This function enables Routing Based on bridging. In this mode, you can set public IP addresses at the MODEM wide area network port, set a private IP address on the LAN port of the MODEM to enable address translation.

③. 1577: IPOA transmits IP data packets over the ATM network. In this mode, the user must have a fixed IP address, subnet mask, and other network parameters, because the user name and password authentication cannot be provided in this mode, and it cannot meet network management, security, and other QoS services during network usage, this method is basically no longer widely used.

④. 2364: PPPoA. This method is basically the same as RFC1577, but after the user establishes an ATM-based physical connection with the ISP, through the PPP protocol, you can establish sessions at the link layer and network layer. When using this protocol, you can implement security verification functions such as PAP and CHAP, which provides corresponding support for security management of ISP networks. In this mode, the MODEM address is automatically allocated by the DHCP server of the ISP after a connection is established through the PPP protocol.

⑤. 2516: PPPoE. This method is based on bridging. When this method is used, after the MODEM establishes a basic physical connection with DSLAM, when the user end uses the PPPoE method on the MODEM, the user end refers to the MODEM) to initiate a PPP request. The PAP (PAP: Password Authentication Protocol) is a form of user identity authentication, it verifies the legality of a user through the user name and user password. Because the user ID and password are directly transmitted in text form on the link, the security is poor.) or CHAPCHAP: Question handshake authentication protocol, it is also a form of user authentication. It sends an authentication question through the server, and the user verifies the legality of the user in the form of a response, because the user's ID and password are encrypted and then transmitted over the network, the security is better.) Two authentication methods use the UAS authentication in the ISP to establish a network connection.

1. ADSL Network Protocol PPPOE
2. ADSL error code table