Apparatus and method for routing multimedia messages between a user agent and multiple multimedia message service centers

1. A router, comprising:

(a) a first server interface for receiving a multimedia message, sent from a user agent, based on a pre-determined destination address;

(b) a message routing mechanism for:

(i) selecting a target multimedia message service center, having an address, from a plurality of multimedia message service centers; and

(ii) applying the address to the multimedia message received by the first server interface by replacing the pre-determined destination address;

(iii) selecting the target multimedia message service center based on session identification information associated with the multimedia message, wherein the session identification information is a unique discriminator, for identifying one of the plurality of multimedia message service centers, incorporated in a component of the multimedia message and selected from a set comprising a transaction identifier, a message identifier and combinations thereof; and

(c) a first client interface for forwarding the multimedia message to the applied address.

2. A router, comprising:

(a) a first server interface for receiving a multimedia message, sent from a user agent, based on a pre-determined destination address;

(b) a message routing mechanism for:

(i) selecting a target multimedia message service center, having an address, from a plurality of multimedia message service centers; and

(ii) applying the address to the multimedia message received by the first server interface by replacing the pre-determined destination address;

(iii) wherein the message routing mechanism selects the target multimedia message service center using a basis selected from the set comprising session identification information associated with the multimedia message, and service identifying information contained in the multimedia message and combinations thereof, wherein the session identification information is a unique discriminator for identifying one of the plurality of multimedia message service centers, incorporated in a component of the multimedia message and selected from a set including a transaction identifier, a message identifier and combinations thereof; and,

(c) a first client interface for forwarding the multimedia message to the applied address.

3. A method for routing a multimedia message sent by a user agent to one of a plurality of multimedia message service centers, the user agent applying a pre-determined destination address to the multimedia message, comprising the steps of:

a) receiving the multimedia message, at the pre-determined destination address;

b) selecting a target multimedia message service center from the plurality of multimedia message service centers;

c) applying an address of the target multimedia message service center to the received multimedia message by replacing the pre-determined destination address; and

d) forwarding the received multimedia message responsive to the applied address of the target multimedia message service center:

wherein the selection of the target multimedia message service center is based on session identification information associated with the multimedia message, the session identification information is a unique discriminator for identifying one of the plurality of multimedia message service centers, incorporated in a component of the multimedia message and selected from a set comprising a transaction identifier, a message identifier and combinations thereof.

4. A method for routing a multimedia message sent by a user agent to one of a plurality of multimedia message service centers, the user agent applying a pre-determined destination address to the multimedia message, comprising the steps of:

a) receiving the multimedia message, at the pre-determined destination address;

b) selecting a target multimedia message service center from the plurality of multimedia message service centers;

c) applying an address of the target multimedia message service center to the received multimedia message by replacing the pre-determined destination address; and

d) forwarding the received multimedia message responsive to the applied address of the target multimedia message service center

wherein selecting the target multimedia message service center uses a basis selected from a set comprising session identification information associated with the multimedia message, and service identifying information contained in the multimedia message and combinations thereof; and

wherein the session identification information is a unique discriminator, for identifying one of the plurality of multimedia message service centers, incorporated in a component of the multimedia message and selected from a set comprising a transaction identifier, a message identifier and combinations thereof.