Method of operating a multi-camp mobile communication device while engaged in a call and receiving a dispatch call

1. A method of operating a multi-camp mobile communication device, comprising:

establishing an interconnect call with a first communication system at a first modem of the mobile communication device;

during the interconnect call:

receiving an incoming dispatch call over a dispatch circuit of a second communication system at a second modem of the mobile communication device, the dispatch call initiated by a dispatch calling party;

responding automatically to the dispatch call, without action from a user of the multi-camp mobile communication device, with a pre-recorded message stored in the mobile communication device indicating that the user of the mobile communication device is currently busy.

2. A method of operating a multi-camp mobile communication device as defined in claim 1 , further comprising retaining a dispatch identifier of the dispatch calling party.

3. A method of operating a multi-camp mobile communication device as defined in claim 1 , further comprising:

subsequent to responding to the dispatch call, receiving a message from the dispatch calling party over the dispatch circuit; and

storing the message in the multi-camp mobile communication device.

4. A method of operating a multi-camp mobile communication device as defined in claim 3 , further comprising alerting a user of the multi-camp mobile communication device that the message has been stored.

5. A method of operating a multi-camp mobile communication device as defined in claim 4 , wherein the alerting is performed by at least one of an audio alert and a visual alert.

6. A method of operating a multi-camp mobile communication device as defined in claim 1 , wherein the interconnect call is performed using a code division multiple access air interface.

7. A multi-camp mobile communication device, comprising:

a first modem for connecting to a first communication network;

a second modem for connecting to a second communication system; and

a controller for controlling operation of the first and second modems;

wherein, when the first modem is engaged in a call with the first communication system and the second modem receives a dispatch call from a dispatch calling party over the second communication system, the controller responds to the dispatch call by transmitting a message to the dispatch calling party.

8. A multi-camp mobile communication device as defined in claim 7 , wherein upon receiving the dispatch call, the multi-camp mobile communication device retains a dispatch identifier of the dispatch calling party in a memory

9. A multi-camp mobile communication device as defined in claim 7 , wherein, subsequent to responding to the dispatch call, the multi-camp mobile communication device receives a message from the dispatch calling party over the dispatch circuit, and stores the message in a memory of the multi-camp mobile communication device.

10. A multi-camp mobile communication device as defined in claim 9 , further comprising a user interface for alerting a user of the multi-camp mobile communication device that the message has been stored.

11. A multi-camp mobile communication device as defined in claim 10 , wherein the user interface includes at least on of an audio alert element and a visual alert element.

12. A multi-camp mobile communication device as defined in claim 7 , wherein the first modem is a code division multiple access modem.

13. The multi-camp mobile communication device of claim 7 , wherein the first modem and the second modem camp on the first and second communication systems at the same time.

14. The multi-camp mobile communication device of claim 13 , wherein the first modem and the second modem commence and receive calls for either of the first communication system or the second communication system while idle.

15. The multi-camp mobile communication device of claim 7 , wherein the multi-camp mobile communication device processes a received dispatch call on the first communication system using the first modem while the multi-camp mobile communication device is currently engaged in an interconnect call with the second communication system using the second modem.