290 lines
15 KiB
Plaintext
290 lines
15 KiB
Plaintext
|
|
||
|
|
|
||
|
|
|
||
|
|
No. 1/1A ESS Div. 3, Sec. 1z(3)
|
||
|
|
Corporate Software Standards Draft Issue 3/12/90
|
||
|
|
|
||
|
|
CUSTOM LOCAL AREA SIGNALING SERVICES (CLASS)
|
||
|
|
|
||
|
|
1.0 INTRODUCTION
|
||
|
|
|
||
|
|
1.01 GENERAL INFORMATION
|
||
|
|
|
||
|
|
AT&T developed a set of 1A ESS revenue generating
|
||
|
|
features called LASS (Local Area Signaling Services).
|
||
|
|
Pacific Bell requested customized software enhancements
|
||
|
|
for some of the features, and will refer to them as CLASS
|
||
|
|
(Custom Local Area Signaling Services). Documentation
|
||
|
|
may refer to either acronym.
|
||
|
|
|
||
|
|
The CLASS features allow increased customer control of
|
||
|
|
phone calls. Existing customer lines can be used to
|
||
|
|
provide call management and security services. The
|
||
|
|
primary basis of CLASS is that the terminating office can
|
||
|
|
obtain the identity of the calling party. Special
|
||
|
|
terminating treatment based on the identity of the
|
||
|
|
calling party can then be provided.
|
||
|
|
|
||
|
|
The CLASS features are dependent upon an SS/CCS
|
||
|
|
(Signaling System 7/Common Channel Signaling) network and
|
||
|
|
use the SS7 Call Management Mode of operation. SS7 is
|
||
|
|
the next generation signaling system that features
|
||
|
|
flexible message formatting, high speed data transmission
|
||
|
|
(56/64 kbps) and digital technology. CCS is defined as a
|
||
|
|
private network for transporting signaling messages. In
|
||
|
|
the existing voice and signaling network, signaling and
|
||
|
|
voice use the same path but cannot use it at the same
|
||
|
|
time. With SS7, signaling and voice have been
|
||
|
|
separated. Signaling (SS7) is over a high-speed data
|
||
|
|
link which carries signaling for more than one trunk.
|
||
|
|
Refer to Corporate Software Standards, Division 3,
|
||
|
|
Sections 1z(1) and 1z(2) for more information on SS7/CCS.
|
||
|
|
|
||
|
|
In the initial deployment, the CLASS features will only
|
||
|
|
work on intraLATA calls that are originated from and
|
||
|
|
terminated to switches that are SS7 capable.
|
||
|
|
|
||
|
|
Although CLASS features will be marketed and sold under
|
||
|
|
the Commstar Custom Calling Feature label, the features
|
||
|
|
will not be available for Centrex and Commstar II
|
||
|
|
customers initially. However, like the other Commstar
|
||
|
|
features, most of the CLASS services can be added to
|
||
|
|
existing telephone equipment and will work on Touch Tone
|
||
|
|
or Rotary sets.
|
||
|
|
|
||
|
|
The Tracking Code (TC) for installation, translation and
|
||
|
|
trunk work associated with CLASS is 299. All time spent
|
||
|
|
on CLASS should be coded to the TC in order to ensure
|
||
|
|
proper time reporting.
|
||
|
|
|
||
|
|
1.02 REASON FOR ISSUANCE
|
||
|
|
|
||
|
|
This document is being issued in order to incorporate
|
||
|
|
Methods and Procedures with Corporate Software Standards
|
||
|
|
for the CLASS features.
|
||
|
|
|
||
|
|
Subsequent changes to this document will be noted with a
|
||
|
|
(>).
|
||
|
|
|
||
|
|
1.03 DESCRIPTION
|
||
|
|
|
||
|
|
Seven features, plus Number ID Blocking, Screen List
|
||
|
|
Editing, and Line History are available with the initial
|
||
|
|
deployment of CLASS in the 1A ESS. Pacific Bell renamed
|
||
|
|
the AT&T features; Bellcore has their own feature
|
||
|
|
names. Documentation may refer to any of the names as
|
||
|
|
noted below.
|
||
|
|
|
||
|
|
Pacific Bell AT&T BELLCORE
|
||
|
|
------------ ---- --------
|
||
|
|
Call Block Selective Call Selective Call
|
||
|
|
Rejection (SCR) Rejection
|
||
|
|
|
||
|
|
Call Return Automatic Callback Auto Recall
|
||
|
|
(AC)
|
||
|
|
|
||
|
|
Call Trace Customer Originated Customer Originated
|
||
|
|
Trace (COT) Trace
|
||
|
|
|
||
|
|
Number ID Individual Calling Calling Number
|
||
|
|
Line ID (ICLID) Delivery
|
||
|
|
|
||
|
|
Number ID Privacy Calling Number
|
||
|
|
Blocking Delivery Block
|
||
|
|
|
||
|
|
Priority Distinctive Alerting Distinctive Ringing/
|
||
|
|
Ringing (DA) Call Waiting
|
||
|
|
|
||
|
|
Repeat Automatic Recall Auto Callback
|
||
|
|
Dialing (AR)
|
||
|
|
|
||
|
|
Select Call Selective Call Selective Call
|
||
|
|
Forwarding Forwarding (SCF) Forwarding
|
||
|
|
|
||
|
|
NOTE: Bulk Calling Line ID (BCLID) will not be offered
|
||
|
|
with the initial deployment of CLASS features.
|
||
|
|
|
||
|
|
Following is a brief description of the CLASS features as
|
||
|
|
well as Line History and Screen List Editing.
|
||
|
|
|
||
|
|
CALL BLOCK The Call Block feature allows the customer
|
||
|
|
to not receive, or block, calls from a
|
||
|
|
pre-specified list of telephone numbers.
|
||
|
|
The telephone numbers are placed on a Call
|
||
|
|
Block Customer's Screening List. When the
|
||
|
|
calling telephone number matches a number
|
||
|
|
on the screening list, the calling party
|
||
|
|
receives a rejection announcement. The
|
||
|
|
customer blocking the calls (called
|
||
|
|
number) does not receive any indication
|
||
|
|
that a call was made.
|
||
|
|
|
||
|
|
Activation Code: *60
|
||
|
|
Deactivation Code: *80
|
||
|
|
|
||
|
|
CALL RETURN When activated, the Call Return feature
|
||
|
|
initiates a call to the last telephone
|
||
|
|
number who called the subscriber. If the
|
||
|
|
calling number is idle, the call completes
|
||
|
|
immediately. If the calling number is
|
||
|
|
busy, the request is queued until the line
|
||
|
|
is idle or he request times out. This
|
||
|
|
feature can be used to re-establish a
|
||
|
|
previous incoming call, or to contact a
|
||
|
|
party who called while the customer was
|
||
|
|
unavailable.
|
||
|
|
|
||
|
|
Activation Code: *69
|
||
|
|
Deactivation Code: *89
|
||
|
|
|
||
|
|
CALL TRACE Call Trace allows the called party to
|
||
|
|
initialize an automatic trace of the last
|
||
|
|
incoming call received. When the customer
|
||
|
|
activates a trace, a message containing
|
||
|
|
the following information is output to the
|
||
|
|
SCC Maintenance Channel:
|
||
|
|
|
||
|
|
1. Time the trace was activated
|
||
|
|
2. DN of the calling party
|
||
|
|
3. MLHG/multiline indicator
|
||
|
|
4. DN and LEN of the customer
|
||
|
|
requesting the trace
|
||
|
|
5. Date and time of the TTY message
|
||
|
|
6. Date and time the call being
|
||
|
|
traced was received
|
||
|
|
7. Privacy Indicator
|
||
|
|
8. CWT Indicator
|
||
|
|
|
||
|
|
Activation Code: *57
|
||
|
|
No Deactivation Code required
|
||
|
|
|
||
|
|
LINE HISTORY Line History provides memory to store the
|
||
|
|
Last Call Directory Number (LCDN), service
|
||
|
|
routines to access the memory and logic to
|
||
|
|
retrieve the LCDNs. Only the LCDN of the
|
||
|
|
most recent originating and terminating
|
||
|
|
call is saved. A permanent Line History
|
||
|
|
Block is maintained for each line in a
|
||
|
|
CLASS office. The LCDN is used in all
|
||
|
|
CLASS features.
|
||
|
|
|
||
|
|
NUMBER ID The Number ID feature enables the customer
|
||
|
|
to identify the calling party before the
|
||
|
|
call is answered. After the first ring,
|
||
|
|
the calling party's DN is displayed on
|
||
|
|
customer premises equipment (CPE). When
|
||
|
|
the calling party's location is not CLASS
|
||
|
|
equipped, or their telephone call is
|
||
|
|
marked private, a code will be appear on
|
||
|
|
the CPE display (e.g. '000-0000' or
|
||
|
|
'private' or 'out-of-area'); the display
|
||
|
|
is up to the CPE vendor.
|
||
|
|
|
||
|
|
No Activation/Deactivation Codes are
|
||
|
|
required.
|
||
|
|
|
||
|
|
|
||
|
|
NUMBER Number ID Blocking allows a customer to
|
||
|
|
ID make their telephone number private on a
|
||
|
|
BLOCKING per call basis by dialing an activation
|
||
|
|
code prior to the called number. The term
|
||
|
|
'private' means that although the calling
|
||
|
|
number is sent to the far end, it is
|
||
|
|
marked private so that there will be no
|
||
|
|
ICLID display of the number; the calling
|
||
|
|
number can still be traced using Call
|
||
|
|
Trace and can also be added to screen
|
||
|
|
lists.
|
||
|
|
|
||
|
|
This capability is available to all
|
||
|
|
customers in a 1A ESS switch that has
|
||
|
|
CLASS, whether or not they have the Number
|
||
|
|
ID feature.
|
||
|
|
|
||
|
|
Activation Code: *67
|
||
|
|
|
||
|
|
PRIORITY This feature provides a distinctive ring
|
||
|
|
RINGING to the subscriber when incoming calls
|
||
|
|
originate from telephone numbers
|
||
|
|
pre-defined on a Priority Ringing List.
|
||
|
|
When the customer with Priority Ringing
|
||
|
|
receives a call and the calling number is
|
||
|
|
on the list, the called party receives:
|
||
|
|
|
||
|
|
Special ringing tone if the called
|
||
|
|
number is idle, or
|
||
|
|
|
||
|
|
If the called customer has Call
|
||
|
|
Waiting and is on a call, they will
|
||
|
|
receive a special tone indicating
|
||
|
|
that a number on their Priority
|
||
|
|
Ringing List is trying to reach them.
|
||
|
|
|
||
|
|
Activation Code: *61
|
||
|
|
Deactivation Code: *81
|
||
|
|
|
||
|
|
REPEAT Upon activation, Repeat Dialing
|
||
|
|
DIALING automatically redials the last otgoing
|
||
|
|
call dialed from the subscriber's line.
|
||
|
|
It does not matter whether the last call
|
||
|
|
dialed from the customer's line was busy
|
||
|
|
or idle, answered or unanswered.
|
||
|
|
|
||
|
|
Repeat Dialing is available to POTS and
|
||
|
|
multiline hunt customers as long as the
|
||
|
|
ring back can be directed to a particular
|
||
|
|
number on a unique LEN.
|
||
|
|
|
||
|
|
If a call cannot be completed immediately
|
||
|
|
due to a busy line, the customer receives
|
||
|
|
a confirmation tone, the call is queued
|
||
|
|
and recall completion is attempted when
|
||
|
|
both parties are idle. The customer with
|
||
|
|
Repeat Dialing receives ring-back ringing
|
||
|
|
(2 short 1 long within six seconds) and
|
||
|
|
upon answering the called party receives
|
||
|
|
regular ringing.
|
||
|
|
|
||
|
|
Once Repeat Dialing has been activated,
|
||
|
|
the busy/idle status of the called and
|
||
|
|
calling lines is checked every 45 seconds
|
||
|
|
for 30 minutes.
|
||
|
|
|
||
|
|
Activation Code: *66
|
||
|
|
Deactivation Code: *86
|
||
|
|
|
||
|
|
SCREEN LIST Screen List Editing allows subscribers to
|
||
|
|
EDITING build and change the lists of telephone
|
||
|
|
numbers associated with the Call Block,
|
||
|
|
Select Call Forwarding and Priority
|
||
|
|
Ringing CLASS features. When editing, the
|
||
|
|
subscriber may also hear the entries on
|
||
|
|
the list and obtain instructions. A
|
||
|
|
screening list is activated when it is
|
||
|
|
initially created during feature
|
||
|
|
activation. When the screening list is
|
||
|
|
active and has at least one number on it,
|
||
|
|
the corresponding feature is on.
|
||
|
|
|
||
|
|
An individual list of DNs is required for
|
||
|
|
each feature that uses screening lists and
|
||
|
|
is associated with the customer's line.
|
||
|
|
|
||
|
|
SELECT CALL This feature automatically forwards
|
||
|
|
FORWARDING incoming calls from telephone numbers that
|
||
|
|
have been pre-defined on the subscriber's
|
||
|
|
Select Forwarding List. Select Call
|
||
|
|
Forwarding is totally independent from
|
||
|
|
Call Forwarding Variable. Separate
|
||
|
|
activations and 'forward to' numbers will
|
||
|
|
be required. Both features may be
|
||
|
|
activated simultaneously.
|
||
|
|
|
||
|
|
Activation Code: *63
|
||
|
|
Deactivation Code: *83
|
||
|
|
|
||
|
|
NOTE: On Rotary sets, the '*' is replaced with '11'
|
||
|
|
on all activation/deactivation codes.
|
||
|
|
|
||
|
|
|