pos is the abbreviation of Packet overSONET/SDH, which is a technology to directly transmit IP packets by using the high-speed transmission channel provided by SONET/SDH. POS technology supports optical fiber media, which is a high-speed and advanced WAN connection technology. Plug a POS module into the router, and the router can provide a POS interface.

the link layer protocols used by p>POS mainly include PPP and HDLC.

POS can provide interfaces with transmission rates of 155Mbps, 622Mbps, 2.5Gbps and 1Gbps, and the highest transmission rate reaches 1Gbps.

the configuration parameters of p>POS interface include interface bandwidth, interface address, interface link layer protocol, interface frame format, interface CRC checksum and flag (flag bit of static load type in frame), etc. When configuring the POS interface, it should be noted that some parameters must be consistent with those of the opposite interface, such as the link layer protocol, frame format, CRC checksum and flag of the interface.

Introduction to POS:

POS (Point of Sale), a sales terminal, is a multifunctional terminal. It can be installed in the special merchants and acceptance outlets of credit cards and connected with computers to form a network, so that electronic funds can be automatically transferred. It has the functions of supporting consumption, pre-authorization, balance inquiry and transfer, and it is safe, fast and reliable to use.