Modem relay over a packet network

A modem relay method for use by a first gateway device, said modem relay method comprising:

• receiving a call from a local modem for establishing a communication with a remote modem;
• requesting a second gateway device to place a call to said remote modem for establishing said communication;
• transmitting ANSam to said local modem for a predetermined period of time;
• monitoring for detection of a CM signal from said local modem;
• monitoring for detection of an AA signal from said local modem;
• monitoring for receipt of a modulation type message from said second gateway device;
• and
• monitoring for receipt of a pass through mode message from said second gateway device.

A modem relay method for use by a second gateway device, said modem relay method comprising:

• receiving a request from a first gateway device for establishing a communication between a local modem and a remote modem;
• placing a call to said remote modem for establishing said communication;
• receiving an answer tone from said remote modem;
• determining a type of said answer tone;
• and
• transmitting an answer tone message to said first gateway device indicative of said answer tone being detected by said second gateway device and said type of said answer tone.

A modem relay method for use by a second gateway device, said modem relay method comprising:

• receiving a request from a first gateway device for establishing a communication between a local modem and a remote modem;
• placing a call to said remote modem for establishing said communication;
• detecting an ANSam signal from said remote modem for a predetermined period of time;
• transmitting an ANSam message to said first gateway device in response to said detecting;
• monitoring for receipt of a CM message from said first gateway device;
• monitoring for receipt of an AA message from said first gateway device;
• monitoring for detection of a modulation type signal from said remote modem;
• and
• monitoring for receipt of a pass through mode message from said first gateway device.

A modem relay method for use by a second gateway device, said modem relay method comprising:

• receiving a request from a first gateway device for establishing a communication between a local modem and a remote modem;
• placing a call to said remote modem for establishing said communication;
• detecting an ANSam signal from said remote modem for a predetermined period of time;
• transmitting an ANSam message to said first gateway device in response to said detecting;
• monitoring for receipt of a CM message from said first gateway device during a predetermined period of time;
• modifying a CM signal to generate an erroneous CM signal;
• and
• transmitting said erroneous CM signal to said remote modem during said predetermined period of time.

A modem relay method for use by a second gateway device, said modem relay method comprising:

• receiving a request from a first gateway device for establishing a communication between a local device and a remote device;
• placing a call to said remote device for establishing said communication;
• receiving a message from said remote device indicative of being a server device;
• and
• establishing a fully-digital connection with said remote device.