TR 50075, September 1999

AT&T Toll Free Transfer Connect^sm Service

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Scope

This document provides information for integrating Voice Response Units (VRUs) with the AT&T Toll Free Transfer Connect^sm Service. VRUs are call-handling devices used by AT&T's Toll Free Services subscribers to answer calls. These units can typically detect touch-tones and play announcements to callers so calls may be properly handled without human intervention. In addition, the document discusses the human interface to the service. Specifically, the human interface is provided through telephone keypad entries which are required to be sent to the AT&T Network as Dual Tone Multi-Frequency (DTMF) signals.

Service Description

Transfer Connect is an AT&T service which enables AT&T Toll Free subscribers to transfer or redirect a Calling Party (CP) to another location. The party (the Toll Free subscriber) that receives the incoming call and wishes to transfer it is designated the Redirecting Party (RP), and the party who is the recipient of the transferred call is referred to as the Target Party (TP). In addition to call redirection, the service supports data forwarding from the RP to the TP. A prerequisite for Data Forwarding is that the RP and the TP have an Integrated Services Digital Network (ISDN) Primary Rate Interface (PRI) connection to the AT&T network. This interface is described in AT&T Technical Reference TR41459. Data Forwarding allows the RP to send data to the TP using the Message-Associated User-to-User Information (MAUUI) signaling procedure described in TR41459. More specifically, for the Data Forwarding feature, the RP must incorporate the data to be transferred to the TP in the User-user Information Element (IE) of the ISDN DISCONNECT or FACILITY message sent from the RP.

The RP can request the redirection of an answered call by entering an in-band DTMF touch-tone command (In-Band Trigger) or by signaling on the ISDN PRI D-channel (Out-Of-Band Trigger). Once the trigger has been entered, the CP will be placed on hold by the Network. The RP can then redirect the call via either direct dialing or speed dialing. The AT&T Network will then attempt to transfer the call to the Target Party based on the dialed number or Speed Dial Code (SDC) entered. For Data Forwarding applications, the RP enters the data after the trigger and the redirection number of the TP.

There are three different features available through AT&T Toll Free Transfer Connect Service. Those features are as follows:

• Conference and Transfer
• Consult and Transfer
• Courtesy Transfer

AT&T Toll Free Transfer Connect Service allows re-directions not only to Toll Free terminations but also to POTS terminations. In addition, re-directions can also be made by entering a pre-provisioned Speed Dial code of 1-5 digits long, instead of entering the entire 10 or 11 digit redirection phone number.

Sections 1 and 2 provide an introduction and overview of the service.

Section 3 discusses the direct dialing and speed dialing options for the service.

Section 4 describes the specifications for In-Band Triggers and Data Forwarding.

Section 5 presents recommendations for pre-recorded outbound announcements (played by a VRU) as well as inbound announcements received by the Redirecting Party from the AT&T Network.

Section 6 describes the requirements for Out-of-Band Triggers and Data.

Section 7 describes requirements for encoding Out-of-Band Triggers and Data from User to Network.

Section 8 describes requirements for Encoding Out-of-Band Triggers and Data from Network to User.

Appendix A discusses encoding recommendations for Data Forwarding.

For further information contact:

AT&T Developmental Relations Group
Room 3A100D
900 Route 202/206 North
Bedminster, NJ 07921

ISDN Vendor testing program is currently suspended

For more information about AT&T documents, see: Catalog Of Communications Technical Publications Publications Catalog (10000)