1033 Extended Superframe Conditioning

This feature enables the ESP to access up to 4 kbps of an 8 kbps extended
superframe (ESF) data channel in a properly equipped Dedicated High Capacity 
Digital (1.544 Mbps) service for control and performance monitoring of the 
end-to-end service.  Within the 8 kbps ESF conditioning data channel, the 
remaining 4 kbps are reserved for terminal synchronization and cyclic
redundancy checking.

Generic Name of ONA Service
 	Product Name						BSE or CNS
===========================================================================
Extended Superframe Conditioning
	AM - Access To Extended Superframe Data Channel		BSA **
	BA - High Capacity Digital Service			BSA **
	BS - Dedicated High Capacity Digital (1.544 Mbps)	BSA **
	SWB - Extended Superframe Format			BSE
	USW - Access To Extended Superframe Data Channel	BSA **

** For Ameritech, Bell Atlantic, BellSouth and U S WEST, this is an alternative
   of the Dedicated High Capacity Digital BSA.

FEATURE OPERATION:
ESF is an optional DS1 bit stream framing method available to the customer who
purchases a high capacity 1.544 Mbps service.  The overhead bits in the
1.544 Mbps bit stream are used for performance monitoring of the DS1 line.
ESF extends the DS1 superframe structure from 12 to 24 frames and divides the
framing bit previously used for basic frame synchronization into channels
for redundancy checks, data link and framing.  ESF creates additional channel
capacity that can be made available for various network and customer functions.

TECHNOLOGICAL AND FEATURE INTERACTION CONSIDERATIONS:
1. This service requires a customer to obtain a DS1 high capacity 1.544 Mbps
   channel.

2. The DS1 equipment must have the ESF option capability.  New vintage D4 and D5
   channel bank equipment has ESF as an available option.

3. References:
   o Bellcore TR-TSY-000194, Extended Superframe Format Interface Specification,
     Issue 1, December 1987.

This service, if offered as a BSE, may be associated with the Dedicated High 
Capacity Digital (1.544 Mbps) basic serving arrangement.
