NEC DS1000 Product Description page 95

Section 3: Features
Table 6: Station Timers
(Continued)
Option Description
Number of Extended If an extension's Class of Service enables Extended Ringing, use
Rings
this timer to set the duration of the Extended Ringing.
Drop Pulse Send Use this timer to set the duration of the ASTU PCB drop pulse.
This pulse is sent from the ASTU PCB to the connected analog
device to initiate a disconnect.
DTMF Detect Use this timer to set the DTMF detection threshold for single
line (analog device) ports. If the analog device sends a DTMF
signal longer than this interval, the system recognizes it as a
valid DTMF tone and decodes it. If the DTMF signal is equal to
or less than this interval, the system ignores it.
Ring No Answer Hunt
Use this timer to set the Extension Hunting Ring No Answer
Time. A call will ring a hunt group member extension for this
interval before automatically cycling to the next extension in the
group.
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DS1000/2000 Product Description Section 3: Features 87