Information system with detachable information module

1. An apparatus comprising:

a base telephone configured for wired communication through a telephone line; and

a portable telephone configured for wireless communication through a wireless network;

the telephones being configured such that when a call is in progress through the portable telephone, mounting the portable telephone on the base telephone redirects the call to the base telephone for a user to continue the in-progress call using the base telephone.

2. The apparatus of claim 1 wherein, as the redirected call is continued through the base telephone, the redirected call is communicated over the wireless network through the portable telephone to the base telephone.

3. The apparatus of claim 1 wherein the portable and base telephones are configured to have a mounted configuration in which the portable telephone is removably mounted on the base telephone and covers the base telephone's display, and the telephones communicate with each other for the portable telephone's display to display information relating to operation of the base telephone.

4. The apparatus of claim 3 wherein, in the mounted configuration, the portable telephone covers the base telephone's keypad.

5. The apparatus of claim 3 wherein, in the mounted configuration, the portable telephone controls operation of the portable telephone's display.

6. The apparatus of claim 3 wherein, in the mounted configuration, the portable telephone has access to functions and features of the base telephone.

7. The apparatus of claim 3 wherein, in the mounted configuration, the base telephone has access to functions and features of the portable telephone.

8. The apparatus of claim 3 wherein, in the mounted configuration, the base telephone controls operation of the portable telephone's display.

9. The apparatus of claim 3 wherein, in the mounted configuration, the base telephone is configured to place phone calls based on contact data stored in the portable telephone.

10. The apparatus of claim 3 wherein the base telephone is configured to automatically return a call received by the portable telephone when the portable telephone is mounted on the base telephone.

11. The apparatus of claim 3 wherein the portable telephone is a cell phone.

12. The apparatus of claim 3 wherein, in the mounted configuration, the telephones communicate with each other wirelessly and can communicate with each other wirelessly even when the portable telephone is not mounted on the base telephone.

13. The apparatus of claim 3 wherein, in the mounted configuration, the telephones communicate with each other through a coupled serial connection.

14. The apparatus of claim 3 wherein the base telephone includes a cavity in which the base telephone's display is located and which receives the portable telephone in the mounted configuration.

15. An apparatus comprising:

a base telephone configured for wired communication through a telephone line; and

a portable telephone configured for wireless communication through a wireless network, the telephones being configured such that when a call is in progress through the portable telephone, mounting the portable telephone on the base telephone redirects the call to the base telephone for a user to continue the in-progress call using the base telephone, the telephones configured to operate in conjunction with a telephone network for handling base-telephone-directed calls, which are calls directed by callers to the base telephone, and a wireless network for handling portable telephone directed calls, which are calls directed by callers to the portable telephone; and

a gateway through which the networks communicate with each other;

the telephones and the gateway being together configured:

to direct the base telephone directed calls to the base telephone;

to route the portable telephone directed calls to the portable telephone when the portable telephone is not mounted on the base telephone;

in response to receiving a wireless control signal indicating the portable telephone is mounted on the base telephone, to re-route the portable telephone directed calls to the base telephone; and

to switch from routing a portable-telephone-directed call to the portable telephone to re-routing it to the base telephone even while the call is in progress in response to the network receiving the control signal indicating the portable telephone has been mounted on the base telephone while the call is in progress.

16. The apparatus of claim 15 wherein the control signal is transmitted by the portable telephone to the network.

17. The apparatus of claim 15 wherein the control signal is transmitted by the base telephone to the network.