| 1. | It can save the telephone rate , it also saves a large amount installation cost of the telephone network , circuit fee , maintenance cost and project fee , etc . it can shorten the project cycle of installing , raise the utilization ratio of networks resource of the computer , suitable for the national conditions of our country
它能够节省电话费，节省大量建设电话网络设备费、线路费、维修费和工程费等费用，缩短安装工程周期，提高计算机网络资源的利用率，适合我国国情。 |
