Patent ID: 8179927
Filing Date: 2012-05-15
Classification: H04L

Abstract:
1. A method for negotiating the capability of a data signal detector (dsd) at a sender gateway, applicable to a fax service in a packet-based network, comprising: sending, by the sender gateway, a first signaling containing a message indicating the capability of the data signal detector during voice band data transmission; and determining, by a receiver gateway, according to a dsd field in the received first signaling, whether the sender gateway sends data in a manner of being processed by the data signal detector; if it is determined that the data is sent in a manner of being processed by the data signal detector, determining to enable a non-voice decoder to decode mute packets; otherwise, it is determined that the data is not sent in a manner of being processed by the data signal detector, determining not to enable the non-voice decoder to decode mute packets, wherein the mute packets includes information outputted by a non-voice encoder and the data excludes the voice data.