System Features Used For Data - AT&T MERLIN LEGEND Release 2.0 Equipment And Operations Manual

Data Communications Support

System Features Used For Data

Some communications system features provided for voice service may also be
used to enhance the usage of data facilities:
Account Code Entry allows tracking of outgoing data calls for billing,
forecasting, or budget reports.
Auto Answer All allows a modem with automatic answering capability to
answer data calls when the user is away from the station. This feature is
used for Analog Voice and Analog Data configurations only.
ARS (Hybrid/PBX mode only) routes calls over outside trunks according
to the number dialed and the trunks available. Therefore, the system can
be programmed to select the least expensive route for each data call.
When using ARS with digital data calls, make sure that the calls use PRI.
Calling Restrictions, such as Allowed Lists, Disallowed Lists and others,
inhibits line access. These features enable companies to control and
manage communications costs for outgoing data calls.
A Data Status button monitors station activity (busy, not busy) of any
data station. The green LED on the button lights up to indicate a "busy"
status. Unlike an Auto Dial or Signaling button, which is programmed
to dial a specific number when pressed, the Data Status button does
not perform any dialing function. Pressing it, then, has no adverse effect
on data calls in progress. The Data Status button is the only button
which should be used to monitor station activity.
Dial Access to a Direct Facility Termination (DFT) provides access
from a digital data station to outside lines supporting the PRI interface.
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System Features Used For Data
Dynamic B-channel assignment. An individual B-channel can be
removed from service without blocking calls to or from any other
B-channels.
Improved toll restriction. PRI trunks severely limit the potential for
bypassing of toll restrictions.
Reliable indication of far-end disconnect. Blocking of incoming
calls is prevented because a trunk is not immediately released;
instead, there is a delayed indication of disconnect.
Improved Station Message Detail Recording (SMDR). Call
records provide more accurate duration information,
Shared use of B-channels for Megacom WATS and Megacom 800
on a call-by-call basis for more efficient use of facilities.
Supports digital data transmission at speeds up to 19.2 kbps for
asynchronous and 64 kbps for synchronous.