考察400电话稳定性和安全性
Investigation of stability and security of 400 telephones
400电话是针对企业客户的通讯业务，如果企业开通的400电话号码来源不明，那么随时有可能被停掉，而且企业毕竟不同于个人，如果无故更换电话号码会给企业带来很严重的损失，所以企业申请办理400电话，一定要选择正规官方授权400代理商渠道，才能保证400电话的安全性和稳定性。
400 telephone is aimed at the communication business of enterprise customers. If the source of 400 telephone numbers opened by enterprises is unknown, they may be stopped at any time. Moreover, enterprises are different from individuals after all. If they change their telephone numbers without reason, they will bring serious losses to enterprises. Therefore, when enterprises apply for 400 telephone calls, they must choose the official authorized 400 agent channel to guarantee 400 telephone calls. Safety and stability.