The research and implementation of callestablishment procedures between gateways.
网关间呼叫建立规程的研究与实现；
2
A mobile communication network (5) transmits a packet callestablishment response signal to the mobile telephone unit (1) and thereafter transmits a packet data.
移动体通信网(5)向便携电话机(1)发送分组呼叫确立应答信号，之后发送分组数据。
3
Thereafter, when the packet callestablishment response signal is received, the packet data storing part (12) reads the packet data from the memory and deletes it therefrom.