02-02-2017 дата публикации
Номер: US20170034343A1
Принадлежит:
Upon detection of a trigger, such as the exceeding of an error threshold or the direction of a user, a diagnostic link system enters a diagnostic information transmission mode. This diagnostic information transmission mode allows for two modems to exchange diagnostic and/or test information that may not otherwise be exchangeable during normal communication. The diagnostic information transmission mode is initiated by transmitting an initiate diagnostic link mode message to a receiving modem accompanied by a cyclic redundancy check (CRC). The receiving modem determines, based on the CRC, if a robust communications channel is present. If a robust communications channel is present, the two modems can initiate exchange of the diagnostic and/or test information. Otherwise, the transmission power of the transmitting modem is increased and the initiate diagnostic link mode message re-transmitted to the receiving modem until the CRC is determined to be correct. 1. A diagnostic link system for communicating data between modems using multicarrier modulation comprising:an initiate diagnostic mode trigger that instructs a transmitting modem to forward an initiate diagnostic mode message to a receiving modem;a message determination device that determines a diagnostic link message; anda receiving modem diagnostic device that receives the diagnostic link message and determines the accuracy of the diagnostic link message.243-. (canceled) This application is a continuation of U.S. application Ser. No. 14/153,282, filed Jan. 13, 2014, now U.S. Pat. No. 8,929,423, which is a continuation of U.S. application Ser. No. 13/004,254, filed Jan. 11, 2011, now U.S. Pat. No. 8,634,449, which is a continuation of 12/779,708, filed May 13, 2010, now U.S. Pat. No. 7,889,784, which is a continuation of U.S. application Ser. No. 12/477,742, filed Jun. 3,2009, now U.S. Pat. No. 7,835,430, which is a continuation of U.S. application Ser. No. 10/619,691, filed Jul. 16, 2003, now U.S. Pat. No. 7,570, ...
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