Method for exchanging signaling messages in two phases

A computer-readable medium having stored thereon instructions for exchanging signaling messages for a call between a calling party to a called party, the instructions when executed by a processor cause the processor to:

• forward a setup message having a destination address from the calling party to the called party;
• receive a setup acknowledgment message from the called party if the destination address corresponds to the called party;
• and
• send the received setup acknowledgment message to the calling party,
• the calling party and the called party exchanging end-to-end messages if the calling party received a forwarded setup acknowledgment message and if at least one from the group of the called party and the calling party sent a reserve message to an associated network edge device.

A method for exchanging messages for a call between a calling party and a called party, comprising:

• sending a setup message having a destination address from the called party to a gate controller;
• receiving a setup acknowledgment message from the called party if the destination address corresponds to the called party;
• and
• exchanging end-to-end messages with the called party if at least one from the group of the calling party and the called party sent a reserve message to an associated network edge device.

A computer-readable medium having stored thereon instructions for exchanging signaling messages for a call between a calling party to a called party, the instructions when executed by a processor cause the processor to:

• send a setup message having a destination address from the called party to a gate controller;
• receive a setup acknowledgment message from the called party if the destination address corresponds to the called party;
• and
• exchange end-to-end messages with the called party if at least one from the group of the calling party and the called party sent a reserve message to an associated network edge device.

A method for exchanging messages for a call between a calling party and a called party, comprising:

• receiving a setup message having a destination address from the called party through a gate controller;
• sending a setup acknowledgment message from the called party if the destination address corresponds to the called party;
• and
• exchanging end-to-end messages with the calling party if at least one from the group of the calling party and the called party sent a reserve message to an associated network edge device.

A computer-readable medium having stored thereon instructions for exchanging signaling messages for a call between a calling party to a called party, the instructions when executed by a processor cause the processor to:

• receive a setup message having a destination address from the called party through a gate controller;
• send a setup acknowledgment message from the called party if the destination address corresponds to the called party;
• and
• exchange end-to-end messages with the calling party if at least one from the group of the calling party and the called party sent a reserve message to an associated network edge device.

A program storage device readable by a machine, tangibly embodying a program of instructions executable by the machine to perform the method steps for exchanging signaling messages for a call between a calling party to a called party, the method steps comprising:

• forwarding a setup message having a destination address from the calling party to the called party;
• receiving a setup acknowledgment message from the called party if the destination address corresponds to the called party;
• and
• sending the received setup acknowledgment message to the calling party,
• the calling party and the called party exchanging end-to-end messages if the calling party received the forwarded setup acknowledgment message and if at least one from the group of the called party and the calling party sent a reserve message to an associated network edge device.

A program storage device readable by a machine, tangibly embodying a program of instructions executable by the machine to perform the method steps for exchanging messages for a call between a calling party and a called party, the method steps comprising:

• sending a setup message having a destination address from the called party to a gate controller;
• receiving a setup acknowledgment message from the called party if the destination address corresponds to the called party;
• and
• exchanging end-to-end messages with the called party if at least one from the group of the calling party and the called party sent a reserve message to an associated network edge device.

A program storage device readable by a machine, tangibly embodying a program of instructions executable by the machine to perform the method steps for exchanging messages for a call between a calling party and a called party, the method steps comprising:

• receiving a setup message having a destination address from the called party through a gate controller;
• sending a setup acknowledgment message from the called party if the destination address corresponds to the called party;
• and
• exchanging end-to-end messages with the calling party if at least one from the group of the calling party and the called party sent a reserve message to an associated network edge device.