Data Communications Configuration Overview - AT&T MERLIN LEGEND Release 2.0 Equipment And Operations Manual

Data Communications Support
Data Communications Configuration
Overview
Figure 5-1 shows how data and voice equipment connects to the
communications system to provide the support for data communications. The
communications system's control unit (hardware and software), in conjunction
with other external hardware devices, provides data connectivity for the
following:
Internal analog data stations
Connection to external analog data stations via analog facilities (GS, LS,
Tie, DID) or via dedicated analog facilities, or via a DS1 Digital Service
Link (DSL) providing emulated GS, LS, Tie, DID, or PRI
Internal digital data stations
Connection to external digital data stations via a Primary Rate Interface
(PRI) facility
Circuit-switched connections between two similar type data stations
Circuit-switched connection between a digital data station (on a B-
channel) and an analog data station via two-stage dialing through a
conversion resource (modem pool)
Conversion resources, such as 7500B 7500B Data Module/modem pools
for making connections between Analog-to-Digital and Digital-to-Analog
data stations
Data Hunt Groups (DHGs)
Simultaneous Voice and Data on analog and MLX ports
On-premises host computer access
Local area network (LAN) access via a modem or 75009 Data Module
connected to an RS-232 port on a workstation on the LAN
This section describes the various equipment configurations and connectivity
arrangements shown in Figure 5-1.
5-2

Data Communications Configuration Overview