NEC Dsx 34b Manual

							
16xx-Timers
160x-Feature Timers
1605-Control Timers
DSX Software ManualSystem Options: 1001-1702◆681
System
1001-1702
1605-04: Forced Program Exit Timer
(Program Exit)
Use this option to set the Forced Program Exit timer. If a telephone in the programming mode is inactive longer 
than this interval, the system automatically cancels the programming mode and makes the telephone idle.
Features
• None
Intr
aMail Features
• None
Options
•1-9999 seconds
•
0 for disabled
Default
•120 seconds
1605-05: Backlight Idle Timer
(Backlight Idle)
Use this option to set how long an extension must be idle before it reverts to its idle backlight brightness setting.
Features
• Station Key Telephones  (page 325)
Intr
aMail Features
• None
Options
•1-9999 seconds
•
0 for disabled
Default
•6 seconds 
						

							
16xx-Timers
161x-COI (Analog Line) Timers
1611-Incoming
682◆System Options: 1001-1702 DSX Software Manual
161x-COI (Analog Line) Timers
1611-Incoming
Description
Use this program to adjust timers that affect incoming calls on the line (COIU) PCBs.
Options
1611-01: Minimum Ring Detect Timer
(Ring Detect)
Use this option to set the threshold for ring detection. If the ring sig\
nal is longer than this interval, the system 
interprets the signal as valid ringing. If the signal is equal to or shorter than this interval, the system ignores 
the ringing. Be sure the value you enter is compatible with the local telco. If you set this value too short, the 
system may detect line spikes and anomalies as ringing. If too long, the system may not properly in\
terpret a 
valid ringing signal.
F
eatures
• None
Intr
aMail Features
• None
Options
•8-2040 mS
Default
•104 mS
1611-02: Minimum Single Ring Detection Timer
(Single Ring Min)
The system uses this option to detect valid ringing signal from the connected telco or PBX. Valid single ring 
must be longer than this interval. F
eatures
• None
Intr
aMail Features
• None
Options
•8-2040 mS
Default
•1216 mS 
						

							
16xx-Timers
161x-COI (Analog Line) Timers
1611-Incoming
DSX Software ManualSystem Options: 1001-1702◆683
System
1001-1702
1611-03: Minimum Double Ring Detection Off Timer
(Double Ring Min)
The system uses this option to detect valid double ring from the connected PBX. Valid double ring must be 
longer than this interval.
F
eatures
• None
Intr
aMail Features
• None
Options
•8-2040 mS
Default
•288 mS 
						

							
16xx-Timers
161x-COI (Analog Line) Timers
1611-Incoming
684◆System Options: 1001-1702 DSX Software Manual
1611-04: Maximum Double Ring Detection Off Timer
(Double Ring Max)
The system uses this option to detect valid double ring from the connected PBX. Valid double ring must be 
less than this interval.
F
eatures
• None
Intr
aMail Features
• None
Options
•8-2040 mS
Default
•576 mS
1611-05: Ringing Signal End Detection Timer
(Ring Stop)
Use this option to set the Ringing Signal End Detection time. If the rin\
ging signal on a line call is interrupted 
for longer than this interval, the system assumes ringing has stopped and terminates the call. Set \
this option 
for compatibility with the connected telco or PBX Centrex. If this interval is set to short, valid ringing will 
be inadvertently cut off. If too long, the system will leave the call set up even after ringing has stopped. F
eatures
• None
Intr
aMail Features
• None
Options
•64-16320 mS
Default
•6016 mS
1611-06: Caller ID Detection Timer
(CID Detect)
Use this option to set the Caller ID Detection Timer. With DSP-based Caller ID, the Caller ID Detection 
Timer is the amount of time between the  first and second ring bursts that the system can detect Caller ID dig-
its. If this timer is set too long, the outside caller will hear ringing\
 followed by reorder tone. If set too short, 
all the Caller ID digits may not be detected. This timer is only used with DSP-based Caller ID. This option 
does not apply to COIU PCBs.
F
eatures
•Caller ID  (page 63)
Intr
aMail Features
• Caller ID and Voice Mail  (page 456)
• Make Call  (page 525)
Options
•64-16320 mS
Default
•2944 mS 
						

							
16xx-Timers
161x-COI (Analog Line) Timers
1612-Outgoing
DSX Software ManualSystem Options: 1001-1702◆685
System
1001-1702
1612-Outgoing
Description
Use this program to adjust timers that affect outgoing calls on the line (COIU) PCBs.
Options
1612-01: DP Break Timer
(Break Time)
Use this timer to set the duration of the Dial Pulse Break signal (i.e.\
, relay open). This is the “off” time in a 
Dial Pulse digit. Set this timer for compatibility with the connected te\
lco or PBX/Centrex. Keep in mind that 
there are three components of a Dial Pulse digit: Make interval, Break interval and Interdigit interval. An 
improper setting may cause misdialing.
F
eatures
•Central Of fice Calls, Placing  (page 78)
Intr
aMail Features
• None
Options
•4-1020 mS
Default
•60 mS
1612-02: DP Make Timer
(Make Time)
Use this timer to set the duration of the Dial Pulse Make signal (i.e., relay closed). This is the “on” time in a 
Dial Pulse digit. Set this timer for compatibility with the connected te\
lco or PBX/Centrex. Keep in mind that 
there are three components of a Dial Pulse digit: Make interval, Break interval and Interdigit interval. An 
improper setting may cause misdialing. F
eatures
•Central Of fice Calls, Placing  (page 78)
Intr
aMail Features
• None
Options
•4-1020 mS
Default
•40 mS
1612-03: DP Interdigit Timer
(Interdigit Time)
Use this timer to set the duration of the Dial Pulse Interdigit signal (\
i.e., relay open time  between  each digit). 
Set this timer for compatibility with the connected telco or PBX/Centrex. Keep in mind that there are three 
components of a Dial Pulse digit: Make interval, Break interval and Interdigit interval. An improper setting 
may cause misdialing.
F
eatures
•Central Of fice Calls, Placing  (page 78)
Intr
aMail Features
• None 
						

							
16xx-Timers
161x-COI (Analog Line) Timers
1612-Outgoing
686◆System Options: 1001-1702 DSX Software Manual
Options
•100-9999 mS
Default
•800 mS
1612-04: PBX/Centrex Flash Timer
(Flash 1 Time)
Use this timer to set the Flash interval. When a user  flashes a line (manually or in a Speed Dial number), the 
system opens the line circuit for this interval. For accurate  flash function, be sure to set this interval for com-
patibility with the connected telco or PBX/Centrex. If you set this interval too short, the telco may not 
always register the  flash. If too long, inadvertent disconnects may occur.
F
eatures
• Flash  (page 177)
• Speed Dial  (page 315)
Intr
aMail Features
• Centrex Transfer  (page 460)
Options
•16-4080 mS
Default
•800 mS
1612-05: Flash Disconnect Timer
(Flash 2 Time)
This option is currently not implemented. F
eatures
• None
Intr
aMail Features
• None
Options
•16-4080 mS
Default
•2496 mS
1612-06: Ground Start Timer
(Ground Time)
Before the system can start a ground start line, the telco’s tip ground must be present for longer than this 
interval. Set this interval for compatibility with the connected telco or PBX/Centrex. If you set this interval 
too short, the system may inadvertently start a line it should not set up. If too long, the system may \
not start 
lines that are functioning normally. F
eatures
• None
Intr
aMail Features
• None
Options
•16-4080 mS
Default
•800 mS 
						

							
16xx-Timers
161x-COI (Analog Line) Timers
1612-Outgoing
DSX Software ManualSystem Options: 1001-1702◆687
System
1001-1702
1612-07: Shunt Pause Timer
(Shunt Pause)
Use this option to set the Shunt Pause Timer (Dial Pulse Mute Timer) for the ATRU PCB. While dial pulsing 
or doing a Flash, the ATRU PCB switches a low resistance shunt across tip and ring to maintain the correct 
impedance on the line. When dialing or  flashing is complete, the ATRU PCB waits this interval before 
releasing the shunt.
This option does not apply to the COIU PCB.
F
eatures
• None
Intr
aMail Features
• None
Options
•4-1020 mS
Default
•8 mS 
						

							
16xx-Timers
161x-COI (Analog Line) Timers
1613-Loop Control
688◆System Options: 1001-1702 DSX Software Manual
1613-Loop Control 
Description
Use this program to adjust timers that affect the loop on the line (COIU) PCBs.
Options
1613-01: Loop Current Detection Timer
(Loop Detect)
For loop start lines, loop current must be present for this interval before the system seizes the line. Set this 
interval for compatibility with the connected telco or PBX/Centrex. If you set this interval too short, the sys-
tem may inadvertently seize unstable lines. If too long, the system may not properly \
seize a valid line.
F
eatures
• None
Intr
aMail Features
• None
Options
•4-1020 mS
Default
•800 mS
1613-02: Far End Disconnect Timer
(Clear Signal)
Use this option to set the loop disconnect interval for outside calls. If the system detects a loop current inter-
ruption longer than this interval it assumes the telco has disconnected the line. It then returns the l\
ine to idle.
Set this interval for compatibility with the connected telco or PBX/Centrex. If you set the interval too short, 
lines may not properly disconnect when the far end hangs up. If you set the interval too long, the system may 
interpret momentary loop current interruptions as positive disconnect. F
eatures
• None
Intr
aMail Features
• None
Options
•4-1020 mS
Default
•300 mS 
						

							
16xx-Timers
161x-COI (Analog Line) Timers
1613-Loop Control
DSX Software ManualSystem Options: 1001-1702◆689
System
1001-1702
1613-03: Power Failure Recovery Detect Timer
(Loop Recovery)
Use this option to set the Power Failure Recovery Detect time. When the ATRU or COIU PCB recovers from 
a power failure, it checks the power failure line for loop current for this interval. If loop current is detected, it 
assumes the power failure telephone is still connected and does not tear down the call. If loop current is not 
detected, the PCB switches the line out of the power failure mode.
F
eatures
• None
Intr
aMail Features
• None
Options
•64-16320 mS
Default
•3008 mS 
						

							
16xx-Timers
162x-SLI (Analog Single Line) Timers
1621-Incoming
690◆System Options: 1001-1702 DSX Software Manual
162x-SLI (Analog Single Line) Timers
1621-Incoming
Description
Use this program to adjust the timers that affect incoming calls to analog single line telephones.
Options
1621-01: Minimum DP Break Timer
(Minimum Break)
Use this option to define the minimum amount of time the loop must be opened to properly decode\
 the dial 
pulse digits sent from analog devices connected to single line PCBs.  Change this value only if the con-
nected analog devices are set to dial at a rate other than 10 PPS.
F
eatures
• None
Intr
aMail Features
• None
Options
•5-1275 mS
Default
•10 mS
1621-02: Maximum DP Break Timer
(Maximum Break)
Use this option to de fine the maximum amount of time the loop must be opened to properly decode\
 the dial 
pulse digits sent from analog devices connected to single line PCBs.  Change this value only if the con-
nected analog devices are set to dial at a rate other than 10 PPS.
F
eatures
• None
Intr
aMail Features
• None
Options
•5-1275 mS
Default
•100 mS