发明名称 |
METHOD FOR CONTROLLING MODEM |
摘要 |
When a MODEM controller detects that the receiving level of probing signals or tone signals having a specific frequency in the phase 2 of a precommunicatio n procedure is lower than a prescribed value, the controller lowers the transmission speed of a control channel to a lower speed of 1,200 bps. When the controller lowers the transmission speed, the controller sets the transmission speed to 1,200 bps by using a prescribed bit in an MPh signal i n a communication control procedure and, at the same time, executes communication at the lowered transmission speed by setting such a condition that the communication with the communication equipment on the remote side a t a different transmission speed is not permitted by using another bit of the MPh signal and informing the communication equipment on the remote side of t he set condition.
|
申请公布号 |
CA2246497(C) |
申请公布日期 |
2001.06.12 |
申请号 |
CA19972246497 |
申请日期 |
1997.12.16 |
申请人 |
MATSUSHITA GRAPHIC COMMUNICATION SYSTEMS, INC. |
发明人 |
NOMA, NOBUHIKO;ARAKI, MITSUHIRO |
分类号 |
H04N1/32;H04L1/00;H04L5/14;H04M11/06;H04N1/333;(IPC1-7):H04M11/06 |
主分类号 |
H04N1/32 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|