Second Dial Tone Timer - Lucent Technologies MERLIN LEGEND Release 5.0 Feature Reference

MERLIN LEGEND Communications System Release 5.0
Feature Reference 555-650-110
Features

Second Dial Tone Timer

Second Dial Tone Timer
At a Glance
Users Affected
Reports Affected
Modes
Telephones
System Programming
MLX Display Labels
Signal
Notify, Send
Notify, Receive
Description
In Release 3.1 and later systems, the system manager can assign a second dial
tone timer to lines and trunks. This feature helps prevent toll fraud when a
company uses special services from the telephone service provider (for example,
when star codes are used). Most telephone service providers offer special
services that involve a second dial tone. For example, star codes enable
telephone users to obtain services provided by the central office (CO). A star
codes consists of a star (*) digit followed by a 2- or 3-digit number and is often
dialed before an outgoing call.
After receiving certain digits dialed by a user, the CO may provide a second dial
tone, prompting the user to enter more digits. If this second dial tone is delayed
and the user dials digits before the CO provides the second dial tone, one of the
following problems can occur:
The central office misroutes the call. In this case, the CO misses the digits
dialed before the second dial tone is provided.
The user places a call to a restricted number, evading calling restrictions.
In this case, a call that should be blocked is not because the first digit that
is dialed before the CO provides second dial tone causes the dialed
number not to match the restricted number.
Using the second dial tone timer, the system manager can set the time interval
during which the CO is expected to provide second dial tone. Once this timer
interval is exceeded, users can dial the remaining digits. If users dial the
remaining digits before the timer interval is exceeded, the MERLIN LEGEND
Communications System blocks the call.
Telephone users, operators
System Information (
All
All
More
Options
Signal [Signl]
Notify,Send [Ntfy,Send]
Notify,Receive [Ntfy,Recv]
3 9
3 9
)
SysSet-up
SecDTDelay Ring
3 9
Issue 1
June 1997
Page 545
Delay Ring