AT&T AT&T manual Data Communications

● Automatic Intercom allows multiline voice terminal users to call each other by use of a dedicated line appearance. A private dedicated path ensures that a path is always available. This feature is frequently used in Boss/Secretary arrangements.

●The Dial Plan for System 25 is based on the concept that, whenever possible, calls should be placed to individuals rather than to pieces of equipment. To implement this concept, individuals are assigned Personal Dial Codes (PDCs) and are allowed to login those PDCs at other terminals. The system automatically routes the call to the home terminal or logged-into terminal. This significantly increases the probability of reaching the called party. In addition, the dial plan is built on a flexible numbering scheme which allows the number of dialed digits to match assigned PDCs (2/3/4 digit dial plans) and to be administered to match telephone company assigned Direct Inward Dialing numbers.

Efficient internal call termination is supported with the following features.

●Distinctive Ringing provides two types of ringing to allow users to distinguish

between outside calls and inside calls,

●Hands-Free Answer on Intercom (HFAI) allows Speakerphone and HFAI terminals to auto-answer inside or attendant extended calls. With HFAI active, the set generates a tone burst over its speaker to alert the calling and called party of the call completion. Both parties may then converse; no action by the called party is required.

Frequently, the first termination point for a call is not its final destination. To support internal call movement, System 25 provides the following features.

●Transfer allows a user to transfer any call to another voice terminal. This feature supports transfer of calls from the answering position to another location for completion of a transaction. Examples are secretary to boss, office to lab, broker to specialist, etc.

● Conference allows up to		five parties (maximum two outside), including the	originator,
to	participate in a call.	This feature supports add-on of additional parties	to a call
for	joint consultation, crisis management, schedule coordination, etc.

●Hold allows a user to suspend a call. The Hold feature allows users to temporarily disconnect from one conversation and either place or answer another call. Music or information bulletins may be provided to the held party. Called parties frequently

use the hold period to access computer data bases, search categories and/or consult with others via a second phone call.

●Call Park allows a user to place a call or conference on hold and then pick up the call

from any voice	terminal.	The user can page another party to pick up the parked call
or may move to	another	location and then re-access the call.

Data Communications

Small Business customers have started to integrate PCs into their day-to-day business operations. Businesses have found a need to access the data bases (sales, inventory, personnel) in these PCs from more than one location (both on- and off-premises). System 2 5 data features are specially engineered to enhance a user’s ability to access data from multiple locations. System 25 has been designed to help these businesses use their personal computers, data terminals and host computers more effectively by providing the following features.

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