1076 Message Waiting Indicator - Activation (Visual)

This capability allows an ESP to indicate to its client that a message is 
waiting for retrieval.  With this capability, the ESP can activate a visual 
alerting signal (usually a lamp) on the ESP's client's line.

Generic Name of ONA Service
 	Product Name					BSE or CNS
==============================================================================
Message Waiting Indicator - Activation (Visual)
	PB - Electronic Business Set Message Waiting	BSE
	USW - Message Delivery Service			BSE

FEATURE OPERATION:
MWI - Activation (Visual) is a central office software and hardware capability 
that allows an ESP with CPE to activate a visual lamp or LCD on their 
subscriber's line when messages are being held (see MWI - Ability to Receive 
Visual Message Waiting).  The subscriber's line, also with special CPE and 
central office software/hardware, would flash at 60 IPM when activated.  After 
a subscriber picked up their messages, the ESP would have the ability to 
deactivate the client's visual message waiting indicator.

Message Waiting Indication, visual or otherwise, is controlled by a software
package in the central office switch, usually Simplified Message Desk Interface
(SMDI) or Message Desk Service.  The software package will activate or 
deactivate a client's message waiting indication based on signals passed over an
interface from the Message Desk Provider to the central office interface.

TECHNOLOGICAL AND FEATURE INTERACTION CONSIDERATIONS:
1. This feature is available in the following central office switches:

Switch Type			5ESS	DMS-100
Earliest Generic Release	5E4.2*	BCS29
				*ISDN	

2. The lamp is off when the ESP's client is off-hook or there are no messages 
   queued and the client is on-hook.

3. This feature can only be offered on an intraoffice basis.

4. References: U S WEST reference publication 77335 - "U S WEST Message Waiting
   Indication - Visual."

This service, if offered as a BSE, is associated with the Dedicated Network 
Access Link basic serving arrangement.
