telecom@eecs.nwu.edu (TELECOM Moderator) (03/18/90)
TELECOM Digest Sat, 17 Mar 90 10:50:00 CST Special: CLASS Phone Features
Inside This Issue: Moderator: Patrick A. Townson
CLASS Phone Features [Chris Ambler]
----------------------------------------------------------------------
Date: Thu, 15 Mar 90 16:13:56 -0800
From: Fubar <cambler@polyslo.calpoly.edu>
Subject: CLASS Phone Features
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.
------------------------------------------------------
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Internet: cambler@polyslo.calpoly.edu | (805) 544-9234 3/12/24 8-N-1
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End of TELECOM Digest Special: CLASS Phone Features
******************************mearle@pro-party.cts.com (Mark Earle) (03/18/90)
Patrick, thank you for the recent CLASS listing. Wish that more of them were available here; we get call waiting, forward, and three-way conferencing, and that's about it, from what I can tell. This leads to a question: Which features are dependant on switch level (7ESS for the "good" ones?) How do I find out which level is installed here? Is there a requestable listing (Bellcore?) or a code/number one can use to interrogate the servicing CO that gives me, the subscriber, a way to find out what I have serving me...?
John_David_Galt@uunet.uu.net (03/20/90)
I asked my local PacBell rep about CLASS just now, and she said that it is being delayed here (Silicon Valley) because most of the carriers that have it are being sued for various reasons. Can anyone fill me in on why? John_David_Galt@cup.portal.com