1046 Call Forwarding - Busy Line Intraswitch

Call Forwarding Busy Line (CFBL) 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 in a busy condition.
The service is activated by a service order.  A call forwarded due to a busy 
condition would always forward to the preprogrammed number (selected at the 
time of the service order).  The called number and the redirected number must 
be in the same central office switch.  The service is deactivated or the 
preprogrammed number is changed by a service order.

Generic Name of ONA Service
 	Product Name					BSE or CNS
===========================================================================
Call Forwarding - Busy Line Intraswitch
	AM - Busy Line Transfer				CNS 
	BA - Fixed Call Forwarding			CNS    
	BA - Call Forwarding Busy Line/Don't Answer	CNS
	BS - Call Forwarding Busy Line 			CNS
	NX - Call Forwarding 2				CNS or BSE 
	PB - Call Forward Busy Line			CNS
	SWB - Call Forwarding Busy Line			CNS 
	USW - Call Forwarding Busy Line			CNS
	USW - Call Forwarding Busy Line/Don't Answer	CNS

FEATURE OPERATION:
This feature is activated/deactivated by a service order.  The "forward to" 
number 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	1AE8A	5E2(2)	BCS24

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

3. Calls may be forwarded to any telephone number, including DID numbers,
   served by the same central office that serves the base station.

4. Subscribers may have CFBL with Call Forwarding Don't Answer (CFDA), 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 CFBL, CW will normally take precedence 
   over the CFBL feature.  However, if the station is made busy by a make-busy 
   key arrangement, CW is not invoked and the CFBL feature takes precedence.

5. References:
   o General reference for Call Forwarding Busy Line (intraswitch): LSSGR
     (TR-TSY-000064), Section 4.2.  Definition only, Feature Number 01-02-1404
     Call Forwarding Busy Line, Issue 2, July 1987, Module TR-TSY-000500.
   o Also see FSD 01-02-0801 Series Completion, Module TR-TSY-000521.
   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.
