1024 Category 3, Type J, Dedicated Derived Channel 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 J, Dedicated Derived Channel BSA

The dedicated derived channel BSA provides one or more low-speed dedicated data
channels (e.g. 9.6 kbps) derived on a dial tone line in addition to the voice 
channel.  The customer is provided with a multiplexed interface requiring the 
use of a data-voice multiplexer (DVM) on the customer's premises.  A matching 
DVM in the central office splits off the data channel(s) from the voice path 
before the voice path enters the circuit switch.

Several alternatives may be available for extending the derived data channel
to the ESP, including a low-speed private line, a multiplexing arrangement 
whereby several derived channels are transmitted on a higher speed private line,
or a data voice multiplexer similar to the equipment employed on the end user's 
access link resulting in "back-to-back" derived channels.

Generic Name of BSA
 	Regional Company BSA Name
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Category 3, Type J - Dedicated Derived Channel BSA
	BA - Dedicated Derived Channel
	BS - Derived Data Channel Service
	NX - DOVPATH(sm)

DOVPATH is a service mark of NYNEX.

Reference:  SR-NPL-000665 Network Interface Specification: DOV/DVM Type 1,
Issue 1, January 1987.
