5012 Line Circuit Switched With T1 Transport (NYNEX Region Specific)

Multiplexing - T1 Transport - 1.544 Mbps - Line Side

This provides the ESP with a digital 1.544 Mbps facility at their premises that
is then available to provide for 24 Line Circuit Switched Basic Serving 
Arrangements.  The interface is capable of transmitting electrical signals at a
nominal 1.544 Mbps rate, with the capability to channelize 24 voice frequency 
transmission paths.  When utilizing analog terminations, either in analog or 
digital switching systems, the BOC will provide multiplex and/or channel bank 
equipment to derive 24 transmission paths of a frequency bandwidth of 
approximately 300 to 3000 Hz.  When utilizing digital terminations, either in 
analog or digital switching systems, the BOC will provide a DS1 signal in D3/D4
format.  All service will be provided with individual transmission path bit 
stream supervisory signaling.

All circuit switched BSAs on the individual DS1 facilities must be uniform in 
that they must all terminate in the same suitably equipped circuit switch.  The
individual 24 circuit switched BSAs must all be of the same equipment type, 
i.e., lines and trunks cannot be mixed.

This service will be provided on an individual case basis.

Generic Name of ONA Service
 	Product Name					BSE or CNS
============================================================================
Multiplexing - T1 Transport - 1.544 Mbps - Line Side
	NX - Line Circuit Switched With T1 Transport	BSE
	USW - Interface Group 6				BSE

Reference:  LSSGR (TR-TSY-000064), Section 10.2 Digital Interfaces,
Issue 2, July 1987, Module TR-TSY-000510.

This service, if offered as a BSE, is associated with the Circuit Switched Line
serving arrangement.
