NEC DS1000 Product Description page 96

Section 3: Features
88 Section 3: Features
Following is a summary of Analog Station Timers.
Option
Loop Current
Minimum Break Time
Maximum Break Time
Minimum Make Time
Maximum Make Time
Minimum Hookflash Time
Maximum Hookflash
Time
Minimum Off-Hook Time
Off-Hook Guard Time
Dial Pulse Guard Timer
Loop Disconnect Time
Ring/MW Wait Period
Time
Table 7: Analog Station Timers
Use this option to set the maximum allowed loop current for the
system's ASTU PCBs. Normally choose 25mA for short loops
and 35mA for long loops. In general, a long loop is 3000 feet or
longer and a short loop is less than 3000 feet.
This timer defines the minimum amount of time the loop must
be opened to properly decode the dial pulse digits sent from ana-
log devices connected to ASTU PCBs.
This timer defines the maximum amount of time the loop must
be opened to properly decode the dial pulse digits sent from ana-
log devices connected to ASTU PCBs.
This timer defines the minimum amount of time the loop must
be closed to properly decode the dial pulse digits sent from ana-
log devices connected to ASTU PCBs.
This timer defines the maximum amount of time the loop must
be closed to properly decode the dial pulse digits sent from ana-
log devices connected to ASTU PCBs.
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 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 prevent 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 to ASTU PCBs.
Description
DS1000/2000 Product Description