1032 Derived Channels (Monitoring)

This capability provides an ESP's client with a connection via low-speed
derived channel to a scanning device located in the central office.  The
scanning device communicates with a subscriber terminal unit (STU) on the
ESP client's premises.  The scanner transmits to the ESP (1) alert signals from
the STU and (2) notification of breaks in the subscriber's local loop.  Breaks 
can generally be detected within a 30- to 90-second interval. 

Generic Name of ONA Service
 	Product Name		BSE or CNS
===========================================================================
Derived Channels (Monitoring)
	BA - REACT(sm)		CNS
	BS - WATCHALERT(R)	CNS
	NX - PULSENET(sm)	BSE
	PB - POLLSTAR(sm)	CNS
	PB - ALARM PLUS(sm)	CNS
	USW - ScanAlert(sm)	CNS

REACT is a service mark of Bell Atlantic Corporation.
WATCHALERT is a registered service mark of BellSouth Corporation.
PULSENET is a registered service mark of NYNEX.
POLLSTAR is a service mark of Pacific Bell, ALARM PLUS is a service mark of
Nevada Bell.
ScanAlert is a service mark of U S WEST.

FEATURE OPERATION:
1. ESP clients with this capability will have their line connected to a scanning
   device in the central office upon receipt of an order by the telephone 
   company.

2. A Subscriber Terminal Unit (STU) is placed on the client's premises by
   the ESP and is connected to the line and the client's alarm sensor.

3. The scanner will periodically poll each client's line for a supervisory
   low tone.  The tone status will indicate a line outage, alarm, or if the
   line is okay.

4. Upon detection of a line outage or an alarm signal, the scanner will 
   transmit an alarm message to a telephone company provided host computer 
   which then transmits the alarm message to the appropriate ESP over a 
   private line connection.

TECHNOLOGICAL AND FEATURE INTERACTION CONSIDERATIONS:
1. This feature is independent of the central office switch type.

2. The client's line must be one-party.

3. This service may not work when certain range extension or subscriber carrier
   equipment is used on the client's line (end to end metallic facilities may
   be required).

4. The STU must be connected to the client's line using an appropriate interface
   device.  The STU and clients other CPE must be compatible with the central
   office scanner.

5. The coded low tone transmitted by the STU is at 37 Hz frequency.

6. Polling of the client's line varies from approximately every 6 seconds to
   approximately every 30 seconds depending on the type of scanner deployed
   by the telephone company.

7. The ESP connection to the telephone company host computer is via a 3000
   series private line.

8. References: 
   o See Ameritech reference AM TR-MKT-000038 Ameritech Scan-Alert 
     Transport Service Deployed With Base 10 Technology, Issue 1, May 1989.  
   o Also see BellSouth technical reference TR-73518 Description of the
     Network Interface for WATCHALERT Service, October 1988.
   o Also see BellSouth technical reference TR-73530 Description of the
     Network Interface at an Alarm Agency to WATCHALERT Service.
   o Also see U S WEST Document 77333 U S WEST Scan-Alert Alarm Signaling
     Transport Service, Issue A, December 1989.

This service, if offered as a BSE, may be associated with the Dedicated
Voice Grade and Dedicated Alert Transport basic serving arrangements.
