发明名称 |
System and method for in-band modem to modem communication |
摘要 |
Systems, methods and programmed instructions are disclosed useful for transmitting signals representing data messages to and from a wireless handheld telephony device along a first call leg of a communication session previously established between the wireless handheld telephony device and at least one second telephony device, the communication session being controlled by a call control server.
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申请公布号 |
US8538397(B2) |
申请公布日期 |
2013.09.17 |
申请号 |
US201213684221 |
申请日期 |
2012.11.22 |
申请人 |
RESEARCH IN MOTION LIMITED;BLACKBERRY LIMITED |
发明人 |
GEORGE RICHARD JOHN;SIMMONS SEAN BARTHOLOMEW |
分类号 |
H04M3/42 |
主分类号 |
H04M3/42 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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