Instruction manual

Page 1138 of 3156 CLASS: Visual Message Waiting Indicator
553-3001-306 Standard 10.00 January 2002
In addition, the CLASS VMWI feature can interwork with Stuttered Dial
Tone. The Stuttered Dial Tone functionality (which is part of the Flexible
Tones and Cadences feature) provides an audible indication, rather than a
visual one, that a message is waiting. It is configured separately from the
CLASS VMWI feature, using the Class of Service (CLS) prompt in LD 10.
If the LPA (Lamp Allowed) response is entered, then a CLASS visual
indication is sent. If the LPD (Lamp Denied) response is entered, then
Stuttered Dial Tone is sent instead. Note that the Stuttered Dial Tone and
CLASS visual indication are mutually exclusive. A CLASS set may receive
either Visual or Stuttered Dial Tone as a message waiting indicator, but not
both.
Permanent Hold
When a CLASS set is placed on permanent hold, the set is still treated as
though it is presented with a phone call. The CLASS VMWI feature will not
send the VMWI message to the CLASS set to turn the visual indication ON
or OFF, until the set actually goes on-hook or the call is not presented to the
set. At this time, VMWI message will be sent to the CLASS set to update the
visual message waiting status.
Set Relocation
When a CLASS set is relocated, the CLASS VMWI feature will lose the
message when the set finishes the relocation. An SCH1099 error message is
printed to indicate that the CLASS VMWI message is lost and no automatic
retry will be attempted.
Feature packaging
The following packages are required for the CLASS VMWI feature:
• Message Waiting Center (MWC) package 46
• CLASS Calling Number Delivery (CNUMB) package 332, or
• CLASS Calling Name Delivery (CNAME) package 333, and