NEC DS1000 Product Description page 117

DS1000/2000 Product Description
Option
Minimum Hookflash Time
Maximum Hookflash
Time
Minimum Ground Flash
Time
Minimum Off-Hook Time
Off-Hook Guard Time
Dial Pulse Guard Timer
Loop Disconnect Time
Ring/MW Wait Period
Time
Table 6: Analog Station Timers
Description
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.
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.
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.
For ASTU PCBs, this timer defines how long a connected analog
device must remain off-hook before the system recognizes the
off-hook status.
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.
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.
When the far end disconnects, the ASTU PCB opens the loop to
the connected analog device for this interval.
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.
Section 3: Features
Section 3: Features N 107
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