1020 Category 3, Type F - Dedicated Digital (< 64 kbps) BSA

Category 3 - Dedicated Basic Serving Arrangement

A dedicated BSA provides an ESP with a dedicated point-to-point connection 
through the network.  This category of serving arrangements are available 
full-time so that individual calls are not set up and taken down.  This BSA 
is capable of supporting analog or digital signals at various transmission 
rates.  The transmission interface may be 2-wire or 4-wire, or derived from a 
variety of multiplexing alternatives (e.g., DS-1 or DS-3).  It is also capable 
of providing supervisory signaling in some configurations. 

Route diversity may be available with this serving arrangement.

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Category 3, Type F - Dedicated Digital (< 64 kbps) BSA

The dedicated digital (< 64 kbps) BSA provides an ESP with a 4-wire digital 
channel to the ESP's client.  This serving arrangement provides for digital 
transmission of synchronous serial data at rates of 2.4, 4.8, 9.6 or 56 kbps.
Error Detection/Correction is an inherent part of this BSA.

Generic Name of BSA
 	Regional Company BSA Name
==========================================================================
Category 3, Type F - Dedicated Digital (< 64 kbps) BSA
	AM - Direct Digital <64 Kbps
     	BA - Digital Data Service
     	BS - SynchroNet(R)/DDS
     	NX - Dedicated - Digital Data
     	PB - Digital Data Service, Private Line Services
     	SWB - Special Access - MegaLink(sm) Data
     	USW - Digital Data Service

SynchroNet is a registered service mark of BellSouth Corporation.
MegaLink is a service mark of Southwestern Bell Telephone.

Reference:  TR-NPL-000341 Digital Data Special Access Service Transmission
Parameter Limits and Interface Combinations, Issue 1, March 1989.
Also see U S WEST document 77312 Digital Data Service, Technical Product
Description, Transmission, Parameter Limits, and Interface Combinations,
Issue A, October 1989.
