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Methods, modems and computer program products for identification of a modem type and adjustment of a communication configuration based on modem type
| Details |
Inventors: Abdelilah, Youssef; Davis, Gordon Taylor; Dholakia, Ajay; Hwang, Dongming; Neeser, Fredy D.; Schule, Robert John; Ware, Malcolm Scott; Ye, Hua;
Assignee: International Business Machines Corporation (Armonk, NY)
Primary Examiner: Chin; Stephen
Assistant Examiner: Odom; Curtis
Attorney, Agent or Firm: Myers, Bigel, Sibley & Sajovec, P.A., Reid; Scott W.
Methods, modems and computer program products for detecting whether a remote modem is of a particular design type and for adjusting the communication configuration for a communication session based on a type of the remote modem. The modem type is recognized based on a knowledge that the modem design of certain manufacturers has a unique associated data pattern contained within the startup communication sequence which is not specified by the protocol but which can be demodulated and detected to thereby recognize that the remote modem is a particular manufacturer's design type. Based on knowledge of the characteristics of the remote modem design, various steps are taken which may improve performance of the communication connection in light of the particular modem design's characteristics. For example, a different Total Harmonic Distortion (THD) threshold may be used for falling back to V.34 communications when the remote modem design only supports up to 2 look ahead for spectrum shaping. |
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DETAILED DESCRIPTION It is an object of the present invention to provide modems which may be able to identify the type of a connected modem during startup procedures.
It is a further object of the present invention to provide modems which may utilize knowledge of the type of a connected modem to improve or optimize the configuration of a communication connection.
These and other objects, advantages, and features of the present invention are provided by methods, systems and computer program products for detecting whether a remote modem is of a particular design type and methods, systems and computer program products for adjusting the communication configuration for a communication session based on a type of the remote modem.
The modem type is recognized based on a knowledge that the modem design of certain manufacturers has a unique associated data pattern contained within the startup communication sequence which is not specified by the protocol but which can be demodulated and detected to thereby recognize that the remote modem is a particular manufacturer's design type.
Based on knowledge of the characteristics of the remote modem design, various steps are taken which may improve performance of the communication connection in light of the particular modem design's characteristics.
For example, a different Total Harmonic Distortion (THD) threshold may be used for falling back to V.
34 communications when the remote modem design only supports up to 2 bit look ahead for spectrum shaping.
In one embodiment of the present invention, a method is provided for detecting at a local modem whether a remote modem is a first type of modem, the first type of modem having a unique associated modem type data.
A received signal from the remote modem is demodulated to provide data associated with the received signal.
The data associated with the received signal is then compared with the unique associated modem type data to determine whether the remote modem is a first type of modem.
In a particular embodiment, the local modem and the remote modem are at least one of a V
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Telecommunications 
