1051 Call Forwarding - Don't Answer Interswitch

Call Forwarding Don't Answer (CFDA) is a central office software capability that
allows a client to have an incoming call redirected to another Directory Number
(DN) if the number dialed (the client's number) is not answered after a 
user-specified number of rings (or time interval).  The service is activated by
a service order.  The called number and the redirected number (forwarded-to 
number) are coded in the central office memory and can only be changed through 
a service order.  The customer may specify the number of rings (or time 
interval) at the time of the service order.  The customer has the option of 
answering the call prior to its being forwarded, as long as the call is answered
within the ringing cycle (time interval) selected.  The called number and the 
redirected number (forwarded-to number) may be in the same or a different 
central office switch.  The service is deactivated, the forwarded-to number 
changed, or the number of rings (time interval) is changed only by a service 
order.

Generic Name of ONA Service
 	Product Name						BSE or CNS
===========================================================================
Call Forwarding - Don't Answer Interswitch
	AM - Alternate Answering				CNS 
	BA - Fixed Call Forwarding				CNS
       	BA - Call Forwarding Busy Line/Don't Answer		CNS
       	BS - Call Forwarding Don't Answer 			CNS
       	NX - Call Forwarding 2 					CNS or BSE
       	PB - Call Forwarding Don't Answer Interswitch		CNS 
       	SWB - Call Forwarding Don't Answer			CNS 
       	USW - Call Forwarding Don't Answer (Expanded)		CNS
       	USW - Call Forwarding Busy Line/Don't Answer (Expanded)	CNS

FEATURE OPERATION:
This feature is activated/deactivated by a service order.  The "forward-to"
number and the number of rings (time interval) is also selected and
preprogrammed at the time of the service order.  (Refer to the capabilities 
called "Call Forwarding - Busy Line or Don't Answer - Customer Control of 
Activation/Deactivation" and  "Call Forwarding - Busy Line or Don't Answer - 
Customer Control of Forward-To Number" for the services with customer control.)

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	1AE10.09*	5E2(2)	BCS24

* References to switching system generics that have not yet been released by the
vendors are based on our current information about which features are planned 
for inclusion in those generic releases.  If the vendors change the availability
of any features for future generic releases that are referenced in this 
document, the availability of some services may be affected.

2. Multiline customers can have CFDA on each line if desired.

3. Calls may be forwarded to any telephone number, including DID numbers,
   served by the same or a different central office.

4. The caller may hear multiple call progress tones if the remote DN is busy.

5. Subscribers may have CFDA with Call Forwarding Busy Line (CFBL), Call
   Forwarding Variable (CFV), and Call Waiting (CW).  If a station has CFV
   and CFBL or CFDA active, then CFV will override the CFBL and/or CFDA 
   features.  If a station has CW and CFDA, CFDA will take precedence over 
   the CW feature if the station is idle. However, if the station is busy, 
   CW will take precedence and does not allow the CFDA feature to take effect 
   if the waiting call is unanswered.

6. References:
 o General reference for Call Forwarding Don't Answer (interswitch): LSSGR
   (TR-TSY-000064), Section 4.2.  Definition only, Feature Number 01-02-1407
   Call Forwarding Don't Answer, Issue 2, July 1987, Module TR-TSY-000500.
 o Also see TR-TSY-000522, FSD 01-02-1450 Call Forwarding Subfeatures,
   Revision 1, August 1988.  

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