1073 Message Waiting Indicator (MWI) -Ability To Receive Audible Message Waiting

With this capability, the ESP's client can receive the audible message 
waiting signal, i.e., stutter dial tone (or recall dial tone), when activated 
by the ESP.  This capability is a client option.  The line should be programmed
with this feature in order for the client to receive stutter dial tone (message
waiting tone).

To activate or deactivate the stutter dial tone on the client's line with the
ability to receive audible message waiting, the ESP uses an SMDI data link to 
the central office switch.

Generic Name of ONA Service
 	Product Name					BSE or CNS
===========================================================================
Message Waiting Indicator (MWI)-Ability To Receive Audible Message Waiting
	AM - Message Waiting Tone			CNS 
	BA - Messaging Services Interface		CNS
	BS - Message Waiting Indication - Audible	CNS
	NX - SMDI					CNS or BSE
	PB - Message Waiting Indicator			CNS
	SWB - Customer Alerting Enablement		CNS
	USW - Message Waiting Indication - Audible	CNS

FEATURE OPERATION:
1. Once the MWI feature is assigned to the ESP's client's line, there is no
   required action by the client to activate/deactivate the feature.

2. Any ESP can turn off/on a client's Message Waiting Indicator providing
   they reside in the same Central Office as the client.

3. With appropriate line translations in Stored Program Control switches, an
   ESP can turn on or off a special recall dial tone (stutter dial tone) to 
   notify their clients of an awaiting message.  Whenever the client attempts 
   to originate a call, the client receives stutter dial tone.  This indicates 
   to the client that a message(s) has been received by the ESP for the client.
   The client will receive stutter dialtone each time he attempts to originate 
   a call until the ESP sends a message to the switch to remove the stutter 
   dialtone (MWI).

4. An ESP's client can use call forwarding busy line (CFBL), call forwarding
   don't answer (CFDA), or call forwarding variable (CFV) to forward their calls
   to the ESP. 

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	5E4.2*	BCS29**	

Note: * In the 5ESS, this feature requires the non-standard pre-ISDN 
arrangement using the ISDN 1 Message AP/ACP or 3A translator with the 
5E4.2 Generic.
Note: ** In the DMS-100, BCS29 supports this feature on Residential Enhanced 
Services (RES).

2. This feature can only be offered on an Intraoffice basis.

3. References:
   o For MWI, for 1A ESS:  TR-TSY-000283, Interface Description - Interface
     Betweem Customer Premises Equipment, Simplified Message Desk and
     Switching System: 1A ESS, Issue 1, July 1985.
   o Recall dial tone (stutter dial tone) described in LSSGR (TR-TSY-000064),
     Section 6.4.3 Call Progress Signals, Issue 2, July 1987, 
     Module TR-TSY-000506. 

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