Timed Break Recall (Tbr) / Hook Flash - NEC SL2100 Quick Install Manual

Configure the SL2100

Timed Break Recall (TBR) / Hook Flash

Timed Break Recall / Hook Flash is used by an SLT to signal to the SL2100 that secondary dial tone is required,
for example to place the call on hold and dial another number when transferring a call.
The TBR button on an SLT is usually marked with R or Recall Note, some telephones may have the button
marked with FLASH.
Hook Flash is not used in the EU and is usually a break period of greater than 500mS.
Timed Break Recall is typically 90~120mS, so the SL2100 must be setup to detect outside of this range.
Loop Current
TBR
90~120mS
The typical setting for the SL2100 is to detect a TBR within a 70~125mS period.
Description
Maximum Break Time
Minimum Hook Flash
Time
Maximum Hook Flash
Time
Note – You must also set the Maximum Break Time for Dial Pulse to a value less than that of the Minimum Hook
Flash Time otherwise the SL2100 will not detect TBR.
Ground Flash Recall (Earth Loop Recall)
Ground Flash Recall is not covered in this guide.
It is not recommended that you change these timers from default.
Minimum Ground-flash Time
Off Hook Detection Time
These timers determine the duration the phone must be off hook before the SL1100 will begin sending dial tone.
It is not recommended that you change these timers from default.
Description
Minimum Off-hook Time
No Detection Time after
Off-hook
Loop Disconnect Time after Reversal
It is not recommended that you change this timer from default.
Loop Disconnect Time after Reversal Time
Ring Message Wait Period
It is not recommended that you change this timer from default.
Ring Message Wait Period
Quick Install Guide – SL2100 Terminals Type B rev 1.0
Function
The maximum duration of a
dial pulse break
The minimum duration of a
Hook Flash/Time Break
Recall TBR
The maximum duration of a
Hook Flash/Time Break
Recall TBR
Function
The minimum time for an off-hook
duration
The duration after off-hook before
dialling will be accepted
Setting
13 For Time Break Recall detection set this timer
to 13 (65mS).
(65mS)
14 For Time Break Recall detection set this timer
to 14 (70mS).
(70mS)
25 For Time Break Recall detection set this timer
(125mS) to 25 (125mS)
21 (105mS)
Default
19 (95mS)
60 (300mS)
60 (600mS)
150 (750mS)
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