| US 7,469,044 B2 | ||
| Callback when not engaged by means of automated redialling in communication networks | ||
| Gerhard Kramarz-Von Kohout, Bonn (Germany) | ||
| Assigned to T-Mobile Deutschland GmbH, Bonn (Germany) | ||
| Appl. No. 10/492,808 PCT Filed Oct. 15, 2002, PCT No. PCT/DE02/03863 § 371(c)(1), (2), (4) Date Aug. 31, 2004, PCT Pub. No. WO03/036928, PCT Pub. Date May 01, 2003. |
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| Claims priority of application No. 101 50 492 (DE), filed on Oct. 16, 2001. | ||
| Prior Publication US 2005/0014521 A1, Jan. 20, 2005 | ||
| Int. Cl. H04M 3/42 (2006.01) | ||
| U.S. Cl. 379—209.01 [379/210.01; 379/210.02; 379/210.03; 455/414.1; 455/417; 455/555] | 6 Claims |
| 1. A method for redialing in telecommunications networks for a callback when a telephone line is not busy whereby a caller
attempts a call to reach a called subscriber, wherein the called subscriber initially does not answer the call, whereby a
redial is automatically performed at predetermined time intervals within a predetermined time window, comprising the steps
of
initiating the automatic redial by a responsible exchange wherein the predetermined time window as freely configured by the
caller, wherein as soon as the subscriber answers, the caller is signaled by a ring tone that the desired call has set up,
and informing the caller when the predetermined time window has expired and the called subscriber has not answered, whereafter
redial is canceled wherein activating or deactivating the redial service provided by the exchange by the caller in the time
window and the time intervals can be freely configured by the caller.
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