name: 3PCC
full_form: Third Party Call Control
context: Figure 5.3.2.1.5.2.1: Message sequence chart for online charging of ECT service establishment â Blind Transfer with 3PCC In this scenario User A is the transferee, User B is the transferor, and User C is the transfer target, and the User B's AS acts as a 3PCC (Third Party Call Control) initiating B2BUA: User A and User B are in an established communication, User B puts User A on Hold. 1. User B sends SIP REFER request in the existing A-B dialog, to initiate transfer User A to User C. Based on the iFC, indicating that User B is subscribed to the ECT supplementary service, the communication is forwarded to AS implementing ECT in a 3PCC mode. 2-3. As "online charging" is activated, the AS sends a Reserve Units Request [Initial, service ECT] to the OCS for requesting units for the ECT supplementary service. The OCS grants units in the Reserve Units Response response for this request. Any potential announcements to be played to the transferor, provided by the OCS within the Reserve Units
description: Third Party Call Control (3PCC) is a supplementary service that enables a third party to control calls between two other parties. In this context, it refers to the ability of User B's Application Server (AS) to initiate Blind Transfer with 3PCC, allowing User B to transfer an ongoing call with User A to User C.
explanation: The text describes 3PCC as a 'supplementary service' and details its function in facilitating call transfers between parties. This clearly positions 3PCC as a telecommunications service.
section_title: 5.3.2.1.5.2Explicit Communication transfer (ECT): Blind Transfer with 3PCC
biotag_Context: O,O,O,O,O,O,O,O,O,B-Procedure,O,O,O,O,O,O,B-Service,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,B-Service,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Protocol,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Procedure,O,O,O,O,O,O,O,B-Network Function,O,B-Procedure,O,O,B-Service,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,B-Procedure,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,O
biotag_Description: B-Service,I-Service,I-Service,I-Service,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,I-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O