4015 DS0-B Interface (BellSouth Region Specific)

DS0-B Subrate Multiplexing Service

DS0-B Subrate Multiplexer (SRM) service provides time division multiplexing
of multiple client digital derived data channels into a single standard
interface for efficient interconnection to an ESP.

Generic Name of ONA Service
 	Product Name				BSE or CNS
============================================================================
DS0-B Subrate Multiplexing Service 
	BS - DS0-B Interface 			BSE or CNS

FEATURE OPERATION:

Service is established via a service order placed by the ESP with the local
operating company.  Appropriate dedicated transport facilities (including
local channel and applicable interoffice mileage elements) are also ordered
for access to the SRM.  The ESP negotiates and makes arrangements with its
clients to connect their individual derived data channels to the SRM.  These
orders must be coordinated with the ESP in order to ensure adequate facilities
are available and appropriate channel assignments, as specified by the ESP,
are made.

TECHNOLOGICAL AND FEATURE INTERACTION CONSIDERATION:

1. This capability is independent of central office switch type.

2. The DS0-B SRM is interconnected to the ESP's client via an appropriate
   derived data channel service in the local serving office.

3. The ESP interconnects to the DS0-B SRM via an appropriate four-wire
   dedicated transport facility.

4. The DS0-B signal is a standard DDS signal as specified in Bellcore
   Technical Advisory TA-TSY-00280.

References:

See BellSouth documents TR73548 "Derived Channel Access Service Digital Data
Over Voice Network Interface Specifications", Issue 1 June 1990 and
Addendum 1 March 1991.
