Patent ID: 6229846
Filing Date: 2001-05-08
Classification: H04M

Abstract:
In a digital communication network providing telecommunication service between data communication devices, at least one of which is an analog modem communicating with the digital communication network via an analog signaling pathway that also supports voice communication, a method for implementing support for increased data communication speed between the data communication devices, comprising the steps of:receiving notification that communication has been initiated between an originating communication device and a terminating communication device connected to the digital communication network;determining whether said communication devices include an analog modem and another data communication device capable of communicating at the increased data communication speed, and if so, then:a. adjusting, as necessary, the filtering present on any analog signaling pathway between the digital communication network and said data communication devices to allow an analog signaling bandwidth on said analog signaling pathway(s) that supports said increased data communication speed;b. performing Analog-to-Digital Conversion (ADC) and Digital-to-Analog Conversion (DAC) to convert between the analog signals carried on said analog signaling pathway(s) and the digital signals carried over said digital communication network;c. selecting an appropriate Z-law companding mode which is compatible with said increased data communication speed; andd. companding said digital signals in accordance with said selected Z-law companding mode.