电话是一个十位数的电话号码，是中国联通，电信，移动为企业客户推出的全国统一的客户服务，销售热线。400电话是一个转接号码，不需要任何安装和设备，只要有号码，然后通过多个企业管理后台绑定手机\机器或PHS（注意：在运营商平台上不允许绑定手机，只能绑定机器，只有三台机器，如果可以绑定手机，则是基于运营商平台的外部平台），企业客户拨打他注册的400部电话，自动转移到他的绑定电话上。在该国家/地区的任何范围内，主叫用户只需拨打“ 400xxxxxx”号码而无需拨打区号，并且可以根据预设方案将呼叫直接转接到客户指定的电话号码或呼叫中心企业业务用户。
Telephone is a ten-digit telephone number. It is a national unified customer service and sales hotline launched by China Unicom, Telecom and Mobile for enterprise customers. 400 phone is a transfer number, without any installation and equipment, as long as there is a number, and then through a number of business management backstage binding mobile phone\ machine or PHS (note: in the operator platform is not allowed to bind mobile phones, can only bind machines, only three machines, if you can bind mobile phones, it is based on the external platform of the operator platform). Enterprise customers call him to register. 400 phones, automatically transferred to his bound phone. Within any range of the country/region, the caller only needs to dial the "400xxxxxx" number without dialing the area number, and can directly transfer the call to the customer's designated telephone number or the enterprise business user of the call center according to the preset scheme.