NEC DS1000 Product Description

Section 3: Features
DS1000/2000 Product Description Section 3: Features ◆ 107
3
Minimum Hookflash Time
For ASTU PCBs, this timer defines the minimum amount of
time the loop must be opened before the system starts to detect a
transfer or hang up sequence. Open loop intervals shorter than
the setting are ignored by the ASTU PCB.
Maximum Hookflash
Time
For ASTU PCBs, this timer defines the maximum amount of
time the loop can be opened in order for the system to detect a
Transfer sequence. Open loop intervals longer than the setting
are interpreted as hang up.
Minimum Ground Flash
Time
For ground start applications with ASTU PCBs, this timer sets
the amount of time a ground must be applied before the system
detects a transfer sequence. The ASTU uses this timer when ana-
log telephones use ground Transfer instead of open loop Trans-
fer. This timer is not used in North America. Do not change
this timer from its default value.
Minimum Off-Hook Time
For ASTU PCBs, this timer defines how long a connected analog
device must remain off-hook before the system recognizes the
off-hook status.
Off-Hook Guard Time
The ASTU PCB waits this interval after an analog device hangs up
before accepting any additional input from the device. This timer
helps prevent erroneous detection due to hardware stabilization.
Dial Pulse Guard Timer
The ASTU PCB waits this interval between dial pulse digits before
attempting to detect any additional DP digits. This timer helps pre-
vent erroneous DP dialing due to hardware stabilization.
Loop Disconnect Time
When the far end disconnects, the ASTU PCB opens the loop to
the connected analog device for this interval.
Ring/MW Wait Period
Time
This timer determines the ringing sequence for the devices con-
nected ASTU PCBs. Because of power consumption, it is not
possible to ring all analog devices on an ASTU simultaneously.
Instead, the card is divided into 4 groups with two ports in each
group. Ringing cycles between the 4 groups, ringing each group
for this interval.
Table 6: Analog Station Timers
Option Description

NEC DS1000 Specifications

General

Brand	NEC
Model	DS1000
Category	Telephone
Language	English