The remote teaching system based on hardware has good quality, but it is not used widely because of large investment, rigid architecture and unapt to extending content.

• 现在市场上的基于硬件实现的远程教育系统虽然质量较好,但因投入大,结构不灵活,不便于扩展内容等缺点而没有得到广泛应用。