1080 Multiline Hunt Group - Overflow

The maximum size of hunt groups is switching system dependent.  This capability
permits hunt groups to be large in size, within the limitations of the switching
system serving the ESP.  MLHG - Overflow allows a call destined for the ESP's 
hunt group to be routed to another telephone number within the same switching 
machine, but outside the hunt group.  This capability requires an extra 
translation in order for the multiline hunt group overflow to be enabled in 
the switch.

Generic Name of ONA Service
 	Product Name				BSE or CNS
===========================================================================
Multiline Hunt Group- Overflow
	AM - Multiline Hunt Group Overflow 	BSE
	PB - Hunting Service			BSE
	USW - Hunting				BSE

FEATURE OPERATION:
In the 1A ESS and 5ESS machines, Call Forwarding Busy Line (CFBL) will
be assigned to the MLHG to accomplish the overflow function.  In the
DMS 100, Line Hunt Overflow to a Route or Line Hunt Overflow to a
Directory Number are utilized to provide this capability.

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. 1A ESS and 5ESS Switches:
   For MLHG hunt lines, CFBL call forwarding occurs only when all lines are
   busy.  The lines hunted depend on the hunting arrangement as follows:

   Regular Hunting, CFBL forwarding treatment is provided only when all lines 
   hunted, including the last line in the hunt group, are found busy.  

   Circular Hunting is similar to regular hunting except hunting does not end
   with the last line in a prearranged hunt group.  In circular hunting,
   all lines in the hunt group are hunted for an incoming call.  CFBL call
   forwarding treatment is provided only when all lines in a circular hunt group
   are searched and found busy.

3. DMS 100 Switch:
   The following overflow features can be assigned to Distributed Number 
   Hunting, Multiline Hunting and Distributed Line Hunting:

   If all lines in the above listed hunt groups are busy, the overflow to a
   directory number (LOD) feature can be assigned to the hunt group.  The
   LOD feature will cause hunting to continue to a specified directory number.

   If all lines in the above listed hunt groups are busy, the overflow to a
   route index (LOR) can be assigned to the hunt group.  This will give the
   ESP the capability to hunt to a trunk group, announcement group, or
   private facilities that are accessed via a route index.

4. References:
   o LSSGR (TR-TSY-000064), FSD 01-02-0802, Multiline Hunt Service,
     Issue 2, July 1987, Module TR-TSY-000521. 

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