AT&T Technical Reference 50075 (September 1999)
TR 50075, September 1999
AT&T Toll Free Transfer Connectsm
Service
Scope
This document provides information for integrating Voice Response Units
(VRUs) with the AT&T Toll Free Transfer Connectsm 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
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Communications Technical Publications Publications Catalog (10000)