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1. 发明授权

US5519703A Method and apparatus for conforming the speed of a called terminal adapter to the speed of a calling terminal adapter 失效
标题翻译：将被叫终端适配器的速度与主叫终端适配器的速度一致的方法和装置
公开(公告)号：US5519703A
公开(公告)日：1996-05-21
申请号：US368070
申请日：1995-01-03
申请人： Pascal Chauffour , Michel Froissart , Dominique Vinot
发明人： Pascal Chauffour , Michel Froissart , Dominique Vinot
IPC分类号： H04L29/08 , H04Q11/04 , H04L7/10
CPC分类号： H04Q11/0457
摘要： Method for automatically adapting and configuring the speed of a terminal adapter (30) to the rate 56 Kbps or 64 Kbps which is used by a calling adapter (20). After sending the CONNECT message via the ISDN NETWORK to the calling terminal adapter (20) in accordance with CCITT Q.931 Recommendations, the called TA (30) is initialized to a rate of 64 Kbps and then continuously transmits (204) an alignment pattern ALL.sub.-- ONES while starting a first timing process (T1). This first timing process will cause the called TA to switch to a 56 Kbps speed if the 64 Kbps validation process does not succeed. The method then involves the step of checking (206) the reception of a ALL.sub.-- ZEROS pattern coming from said calling adapter (20) before the end of said first predetermined period (T1). If this case, a 64 Kbps validation process will be performed which comprises the checking whether a ALL.sub.-- ONES pattern is received within a second period (T2), in which case the 64 Kbps rate configuration will be validated. On the contrary, if the ALL.sub.-- ZEROS pattern is not received at the end of the first period (T1), a 56 Kbps rate validation process is initiated which is based on the detection of a so-called 56 Kbps pattern within the data flow. The 56 Kbps pattern is defined as being a number of n bytes with the first bit of every byte being set to a one. Additionally, the 64 Kbps validation process involves the checking (210) of the continuous receiving of said ALL.sub.-- ZEROS pattern during said first period (T1) as long as the ALL.sub.-- ONES pattern is not yet received, and at the end of said first period (T1) validating (209, 213) the 64 Kbps rate.
摘要翻译：用于自动调整并将终端适配器（30）的速度配置为由呼叫适配器（20）使用的速率56Kbps或64Kbps的方法。根据CCITT Q.931建议书，通过ISDN网络向主叫终端适配器（20）发送CONNECT消息后，将被叫TA（30）初始化为64Kbps的速率，然后连续发送（204）对准模式 ALL-ONES在开始第一个定时过程（T1）时。如果64 Kbps验证过程不成功，则此第一个定时过程将导致被叫TA切换到56 Kbps速度。该方法包括在所述第一预定时段（T1）结束之前检查（206）接收来自所述呼叫适配器（20）的ALL-ZEROS模式的步骤。如果这种情况，将执行64Kbps的验证过程，其中包括检查在第二时段（T2）内是否接收到ALL-ONES模式，在这种情况下，64Kbps速率配置将被验证。相反，如果在第一周期（T1）结束时未接收到ALL-ZEROS模式，则启动56 Kbps速率验证过程，其基于在数据流内检测所谓的56Kbps模式。 56Kbps模式被定义为n字节数，每个字节的第一位被设置为1。此外，64Kbps验证过程涉及在所述第一时段（T1）期间连续接收所述ALL-ZEROS模式的检查（210），只要ALL-ONES模式尚未被接收，并且在所述第一时间段（T1）验证（209,213）64Kbps速率。

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