Call Transfer Supplementary Services Procedures

TS 04.91Rel-7Services2GIntermediate

Defines radio interface procedures for Explicit Call Transfer (ECT) supplementary service in GSM networks, enabling subscribers to connect two existing calls.

Protocol Definition

Document Type

Technical Specification

Network Layer

Services

Subcategory

Supplementary Services

Business Impact

Medium

Key Technologies

GSMECTSS

Read Full Specification

View the complete text of 3GPP TS 04.91 with table of contents and cross-references.