Patent ID: 7639403
Filing Date: 2009-12-29
Classification: H04N

Abstract:
1. A method of connecting a first V.34 enabled fax machine to a second V.34 enabled fax machine over a network utilizing at least one gateway that operates in accordance with the T.38 un-enhanced protocol, a method including the following steps during an initial handshaking process between said machines: placing a call by said first fax machine to said second fax machine over a voice grade connection, generating an AnsAm signal by said second fax machine in response to said call, transmitting said AnsAm signal to said first fax machine, said first fax machine generating a CM tone, suppressing said CM tone so that it does not reach said second fax machine, and said first and second fax machine falling back to the G3 speed and communicating using the G3 protocol.