铁路电话专网的主叫号码传送规范

Technical Specification of Caller's Number Transmission in the Dedicated Telephone Network of CRC

长期以来铁路专网没有主叫号码传送的技术规范 ,必须制定适合专网特色和用户要求的规范 。

In the past, there is no technical specification of calling number transmission in dedicated telephone network of CRC. This article gives some suggestion on caller's number transmission that take into consideration the characteristics of the dedicated telephone network of CRC.