1066 Customer Originated Trace

Customer Originated Trace (CLASS) capability allows a customer to have the 
last incoming number automatically traced.  The results of the trace are not 
provided directly to the customer, they are output to an authorized agency.
This capability requires that both the originating and terminating central 
offices be equipped with Common Channel Signaling (CCS) SS7 and be 
interconnected by SS7.

Generic Name of ONA Service 	Product Name		BSE or CNS
===========================================================================
Customer Originated Trace	BA - Call Trace		CNS
                         	BS - Call Tracing	CNS or BSE
				NX - Call Trace		CNS
                         	PB - Call Trace		CNS
                         	SWB - Call Trace(sm)	CNS
                         	USW - Call Trace	CNS

Call Trace is a service mark of Southwestern Bell Telephone Company.

FEATURE OPERATION:
Depending on the Local Exchange Company's implementation of this service,
the customer either contacts the telephone company to request the service,
which requires a service order, or the service is automatically available
on an office basis to everyone.  In either scenario, once the appropriate
translations are done to the line(s), the customer can initiate a trace of
the last incoming call (after hanging up) by going off-hook and dialing
*57 (1157 for rotary dial).  The customer then receives one of the following 
type announcements depending on how the service is implemented:
 o One-Level Announcement
   If the calling number is valid, an announcement is given informing the 
   customer that the trace was successful and instructs the customer what to do
   next.  If the calling number is invalid, an announcement is given indicating
   why the trace cannot be done and dial tone is returned to the customer.
 o Two-Level Announcements
   The customer receives an announcement explaining that they have accessed
   the Customer Originated Trace service.  Then, if the calling number is
   valid, the customer is instructed to dial "1" if they wish to activate
   the service and trace the call or to hang up to abort.  If the customer
   dials "1", an announcement is given informing the customer that the
   trace was successful and instructs the customer what to do next.  If
   the calling number is invalid, an announcement is given indicating why
   the trace cannot be performed and dial tone is returned to the customer.

The results of the trace are not given to the customer.  They are
automatically transmitted to an agency (determined by the telephone
company), where the information is stored and available for further action.

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	1AE10*	5E5	BCS28

Note: * Available on an intraoffice basis with 1AE9.

2. The serving central office switch must be equipped with the appropriate CLASS
   Customer Originated Trace software and hardware.  In order for this service 
   to work on an interoffice basis, both the originating and terminating 
   switches must be equipped with the CLASS and the Common Channel Signaling 
   (CCS) SS7 software and hardware and the interoffice trunks must be converted
   to SS7.  This service is only offered on an intraLATA basis at this time.

3. This is a "line" service and therefore cannot be assigned to subscribers with
   trunk terminations (i.e., PBX with DID).  This service is also unavailable to
   multiparty lines and 1A ESS remote switching system (RSS) lines.  In 
   addition, this service is unavailable to customers that have denied 
   originating and denied terminating treatment.

4. The information delivered to the authorized agency includes:  the called
   telephone number, the calling telephone number, the date, and the time
   of the call.

5. If the customer has Call Waiting and if the Call Waiting is activated
   during a call, the call waited number is the number that will be
   traced if Customer Originated Trace is activated.

6. References:
   o LSSGR (TR-TSY-000064), FSD 01-02-1052 (place holder only).
   o TR-TSY-000216 CLASS Feature: Customer Originated Trace, Issue 2, June 1988.

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