AT&T AT&T manual Data Call Origination Using Transfer to Data, Data Call Preindication, 247

TRANSFER TO DATA

D e s c r i p t i o n

Allows multiline voice terminal users to originate or answer a call from their voice terminals and then establish a data connection by transferring the call to a data terminal. This feature was formerly called One-Button Transfer to Data (V1).

(Refer also to the overview of the system’s data features provided in the “Data Services Overview” description.)

Data terminal calls can be set up from a multiline voice terminal with a DATA button. The DATA button is associated by Data Dial Code (DDC) with a digital data endpoint. A separate DATA button must be provided for each data terminal that the voice terminal can transfer calls to.

The DATA button status LED provides status indications for the data endpoint:

● Dark–Data endpoint is idle

●Winking–Data endpoint is reserved

● Flashing–Data endpoint is being alerted to an incoming call

●Steadily Lighted–Data endpoint off-hook (busy).

The DATA button status LED will wink only when a voice terminal reserves a data endpoint by Data Call Preindication.

Data Call Origination Using Transfer to Data

A voice terminal user, after calling a DDC or a PDC (to reach an analog data endpoint) receives either answer tone or called party answer, respectively. The user then transfers the call to the associated data terminal by pressing DATA and hanging up. The called party may also use Transfer To Data to transfer the call to a data terminal.

An inside call cannot be transferred via Transfer To Data until the far end answers.

If a handshake failure occurs after Transfer				To	Data,	the	data	call will	be disconnected		and
the data terminal left in the idle (on-hook) state.
Note: Even if the associated data			port is optioned for autobaud, the call							will be set	up
at the highest	common	speed	that	the calling			and	called	data	terminals	are
administered for,	independent	of the	current		data	terminal		settings.

Data Call Preindication

A multiline voice terminal user, by going off-hook and pressing an idle DATA button, may indicate that a data call will be attempted. This reserves the associated data port and a modem pool conversion resource. This procedure is recommended when the data call is a trunk call. The data port reservation is acknowledged by a winking status LED at the DATA button. Subsequently, invoking Transfer To Data transfers the call to the associated data terminal.

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