Instruction manual

Page 1094 of 3156 CLASS: Calling Number and Name Delivery
553-3001-306 Standard 10.00 January 2002
Feature description
The Custom Local Area Signaling Service (CLASS) Calling Number and
Name Delivery (CND) feature enables the Meridian 1 system to send the
calling number and/or calling name to a CLASS set when a call is presented
to it, per the Bellcore CLASS CND standard. Once the Meridian 1 delivers
the CLASS CND information, it is completely up to the CLASS set to
determine how the information is to be displayed. The CLASS set can even
choose to ignore certain information by not displaying it.
A CLASS set is, by definition, any non-proprietary analog set with an
integrated display and a Frequency Shift Key (FSK) modem receiver, or with
a FSK modem receiver built-in display attachment. The CLASS sets are
configured on the Meridian 1 as analog (500/2500 type) sets using Overlay
10, and are supported by the existing 500/2500 type peripheral line cards.
The calling number and/or calling name data is delivered from the
Meridian 1 to the CLASS sets using FSK signaling by a CLASS modem
(CMOD) unit. The CMOD units are configured using Overlay 13. They are
supported by an Extended CLASS Modem (XCMC) IPE line card, the
NT5D60AA
Up to 255 CMOD units may be configured on a Meridian 1 system that is
equipped with the CLASS CND feature. Once configured, the CMODs are
shared throughout a multi-customer Meridian 1 system. When a call is
presented to a CLASS set, an available CMOD is automatically allocated.
Upon reaching the CND delivery interval
1
, the appropriate CND information
is delivered to the CLASS set. The allocated CMOD unit is released when
ringing resumes on the CLASS set after the CND delivery interval, or when
the call is disconnected, answered, or redirected. If the call is disconnected,
answered, or redirected before the CND delivery interval has been reached,
then no CND information is delivered. If the call is disconnected, answered,
or redirected while the CND information is being delivered, the CND
delivery is immediately terminated. Figures 26 to 29 depict a typical call
processing and system resource allocation scenario for a new call being
presented on a CLASS set.
1.The CND delivery interval is the first silent interval, after ringing has been applied for a new call, that is
greater than two seconds.