5019 3 Way Calling (NYNEX Region Specific)

Three Way Calling

Three Way Calling (TWC) allows a customer to add a third party to an existing 
conversation without operator assistance.  The party initiating TWC may hold one
party with privacy exclusion while dialing and talking with another party and 
can later include the held party in TWC.

Generic Name of ONA Service 	Product Name		BSE or CNS
============================================================================
Three Way Calling		BA - Three Way Calling	BSE
                 		NX - 3 Way Calling	BSE
                 		USW - Three Way Calling	BSE

FEATURE OPERATION:
A customer subscribing to TWC is able to add a third party to a stable call 
regardless of which party originated the call.  The subscribing customer flashes
his switch-hook, receives recall dial tone, dials the third party, and flashes 
the switch-hook again.  The third party may be added to the call while the 
station is receiving ringing or the subscribing customer may speak with the 
third party in private prior to adding the third party to the stable call.

The third party will be disconnected from the call if the party initiating the 
TWC flashes the switch-hook.

If the party initiating the TWC disconnects, all parties are disconnected.

If a party other than the party initiating the TWC disconnects, the remaining 
two parties may continue the call.

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	1AE8	5E2	BCS17

2. Recursive use of TWC is limited only by resources of the switching
   system and transmission capabilities (A adds on B, B adds on C, C
   adds on D, etc.)

3. Dialing restrictions of a station continue in effect when dialing
   a party to be added on.

4. Speed Calling can be used when adding a party.

5. The initiator of TWC should not receive a Call Waiting tone.  Other parties 
   on the call can receive and respond to a Call Waiting tone.

6. Either or both legs of a three way call may be an interexchange
   or international call.

7. TWC is not available on lines with two or more parties.

8. References:
   o LSSGR (TR-TSY-000064), FSD 01-02-1301, Three-Way Calling,
     Issue 2, July 1987, Module TR-TSY-000522.

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