1059 Called Directory Number Delivery via 900NXX

This capability will provide the ESP with the directory number that terminated 
the call via a circuit switched trunk access arrangement.  The method used is 
900NXX dialing and Feature Group D (FG D) signaling protocol.  The called 
directory number information (900NXXXXXX) is included within the FG D signaling
protocol.  The assignment of a 900NXX number to each ESP provides the ESP the 
capability to assign up to 9999 line numbers.  With this capability, the FG D 
signaling protocol would deliver the specific dialed line number (900NXXXXXX) 
to the ESP.

Generic Name of ONA Service
 	Product Name				BSE or CNS
===========================================================================
Called Directory Number Delivery via 900NXX
	AM - Called Directory Number Delivery	BSE 
       	NX - Tandem Routing			BSE
       	SWB - Switched Access - FG D		BSA *

* For Southwestern Bell Telephone, this is an inherent feature of Switched
  Access - FG D service.

FEATURE OPERATION:
This feature is activated/deactivated by an Access Service Order.  

TECHNOLOGICAL AND FEATURE INTERACTION CONSIDERATIONS:
1. This feature is available in the following central office switches:

Switch Type			1A ESS	5ESS	DMS-100
Earliest Generic Release	1AE8A	5E2(2)	BCS17

2. The service is LATA wide and can be accessed either at the tandem or at the
   end office.  Both access arrangements must be properly equipped with
   Feature Group D trunks to the 900NXX serving carrier.

3. Calls that originate from non-FG D offices will be handed off to the ESP at
   the access tandem using the FG D protocol.

4. References:
   o Feature Group D is described in LSSGR (TR-TSY-000064), FSD 20-24-0000,
     InterLATA Carrier/International Carrier Interconnection (Feature Group D),
     Issue 2, July 1987, Module TR-TSY-000530.  
   o Also see TR-NPL-000334 Voice Grade Switched Access Service - Transmission 
     Parameter Limits and Interface Combinations, Issue 1, June 1986, 
     Revision 1, November 1987.

This service is associated with the Circuit Switched Trunk basic serving 
arrangement.
