(19) United States
(12) Patent Application Publication (io) Pub. No.: US 2004/0202303 Al
Costa-Requena et al. (43) Pub. Date: Oct. 14,2004
(54) METHOD AND APPARATUS FOR PROVIDING CONFERENCE CALL ANNOUNCEMENT USING SIP SIGNALLING IN A COMMUNICATION SYSTEM
(76) Inventors: Jose Costa-Requena, Helsinki (FI);
Jarmo Kuusinen, Tampere (FI);
Inmaculada Espigares, Helsinki (FI)
Correspondence Address:
WARE FRESSOLA VAN DER SLUYS &
ADOLPHSON, LLP
BRADFORD GREEN BUILDING 5
755 MAIN STREET, P O BOX 224
MONROE, CT 06468 (US)
(21) Appl. No.: 10/377,149
(22) Filed: Feb. 28, 2003
Publication Classification
(51) Int. CI.7 H04M 3/42; H04L 12/16;
H04Q 11/00
(52) U.S. CI 379/205.01; 370/261
(57) ABSTRACT
A method and corresponding equipment for setting up a conference call via a communication network that uses session initiation protocol (SIP) signalling for call setup, the method including steps (Ela E2a E3a E4a) of providing during the call setup signalling to a subscriber invited to participate in the conference call an indication that the call is a conference call and including in the call setup signalling a reference to a group document indicating information about the conference call, such as the other invited participants, or including the group document itself.
