AT&T AT&T manual THIRD-PARTY Call Setup, Voice Terminal source, Data Terminal source, 239

THIRD-PARTY CALL SETUP (V2)

D e s c r i p t i o n

The Third-Party Call Setup feature allows a data terminal (the third party) in Command Mode to set up a call between an on-premises voice or data terminal (the source) and another voice or data terminal (the destination; can be on- or off-premises). Once the call has been set up, the third-partydrops off and is not included in the call.

Each third-partydata terminal may be administered to have a particular source terminal “associated” with it. This association allows an abbreviated form of dialing when activating the Third-Party Call Setup feature. Through further administration, the third-partydata terminal may be given permission to set up calls for any source terminal, for only the associated source terminal, or for no source terminal (feature disabled).

When the user successfully activates Third-Party Call Setup and has dialed all digits correctly, the following occurs, depending on the source terminal type:

● Voice Terminal (source)

The source voice terminal (if not busy) receives priority ringing. A priority ringing cycle consists of two short bursts followed by one long burst. The source terminal’s handset must be picked up within three ringing cycles; the destination terminal will then be called. Regardless of the call outcome, the third-partydata terminal displays the message C O N F I R M E D and D I S C O N N E C T E D immediately after calling the destination terminal.

If the source terminal’s handset is not picked up within three priority ringing cycles, t h e t h i r d - p a r t y d a t a t e r m i n a l d i s p l a y s t h e m e s s a g e s N O A N S W E R a n d D I S C O N N E C T E D . If the source phone is busy, the third-partydata terminal displays BUSY and D I S C O N N E C T E D .

A call to a source terminal that has the Hands-Free Answer on Intercom (HFAI) feature activated results in the automatic answering of the source end, and the destination terminal will be called. The third-partydata terminal displays CONFIRMED and DISCONNECTED .

● Data Terminal (source)

If the source terminal is a data terminal whose speed is set to the highest optioned speed of the data port, the message REMOTE SETUP is displayed at the source terminal and the C O N F I R M E D / D I S C O N N E C T E D message is displayed at the third-partydata terminal. The destination terminal will then be called automatically from the source terminal . If the source terminal and destination terminal are compatible, a data connection is established.

Since the System 25 does not provide call progress tone detection for an off-premises call (can’t detect second dial tone, for example), pause characters should be inserted at appropriate places in the dialed digit string. In addition, Third-Party Call Setup calls are subject to the administered restrictions assigned to the source voice or data port. For example, if the source terminal is restricted to on-premises calls only, a call to an off- premises destination terminal will be blocked.

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