Method for realizing ring back tone in communication system

Details Method for realizing ring back tone in communication system Method for realizing ring back tone in communication system

2011-07-26

2011-07-26

Deane, William J (Department: 2614)

Telephonic communications

Centralized switching system

With generating of call associated substation signal

C379S069000

Reexamination Certificate

active

07986775

ABSTRACT:
A method for realizing ring back tone in communication system, enabling that the calling user can only hear the ring back tone triggered by the primary called user no matter whether the call is forwarded or how it is forwarded. In the present invention, service control unit sets a mark indicating not to request ring resource in Invite message initiated to the forward user, and indicating the backward service control unit not to request triggering the ring resource. Optionally, service control unit only sends ringing message forwardly when it receives the backward ringing message and succeeds to request ring resource, and when it receives the backward ringing message, if service control unit has ever initiated call forward, then it deactivates backward ring resource. Optionally, each service control unit requests ring resource respectively, and forwards it when it receives 200 OK, where a mark indicating it coming from ring resource is set; service control unit deactivates backward ring resource, if it finds the mark in the backward 200 OK.

REFERENCES:
patent: 2002/0111156 (2002-08-01), Roeder
patent: 1543231 (2004-11-01), None
patent: 1 179 941 (2002-02-01), None
patent: 1 523 199 (2005-04-01), None
patent: 2004/054282 (2004-06-01), None
European Search Report dated Sep. 3, 2008; Application No./Patent No. 06741698.2-2414 / 1874016 PCT/CN2006000754.

Affiliated with

Also associated with

Rating

Method for realizing ring back tone in communication system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for realizing ring back tone in communication system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for realizing ring back tone in communication system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2692169