Code 4: Recall Timing; Code 5: Pause After Recall; Code 8: Call Forward, External And Disa Disconnect Timer For Loop Start Lines; Code 9: K5Rcu Dtmf Receiver Inter-Digital Release Time - Toshiba Strata DK40 Programming Manual

System & Station

Code 4: Recall Timing

When on an Exchange line, a station user can press the 5HFDOO button (or enter access code
&QI27UQ &78) and the line opens (recall) for 2 seconds, 0.2 seconds 0.1 seconds or 0.5
seconds depending on this assignment. This choice reflects whether to disconnect and regain
dial tone (2 seconds), or to use PBX features which require a recall signal (0.5 seconds).
Note

Code 5: Pause After Recall

Some Exchanges facilities require a period of time after a recall signal before they can accept
dialling signals. A selection of pause timing is available to automatically delay any dialling
signals after recall. This timing applies to Speed Dial calls (with recall signals between the
telephone number digits) as well as to manual dialling.
Code 8: Call Forward, External and DISA Disconnect Timer for
Loop Start Lines
Disconnects DISA, Call Forward External Network routed calls when made on loop start
lines. Calls can lock-up (keep busy indefinitely) if the Exchange does not send a disconnect
signal (CPC or AR) when the caller hangs up. This timer prevents loop start lines from
locking up by disconnecting the call automatically when the timer expires, 30 or 60 minutes
from the start of the call. Callers will hear a warning tone and can reset the timer repeatedly
by dialling "0". This disconnect feature is only needed for loop start lines. If "0" is set no
disconnect time will be applied.

Code 9: K5RCU DTMF Receiver Inter-digital Release Time

With Code 9, one channel of the K5RCU Dual-tone Multi-frequency (DTMF) receiver is
seized when it is needed for the decoding process, such as for a standard telephone with a
DTMF dial pad. When placing outgoing calls with DTMF standard telephones, the talk path
to the outside party is not "cut-through" until the DTMF receiver circuit is released. The
DTMF receiver channel's release time can be programmed for between one and nine seconds
(initialised timing is four seconds)—this is the time it takes to release the DTMF receiver
circuit after the last digit is dialled.
The choice of timing is a trade-off between Exchange line time to connect and user speed. If
the time is too long, the outside called party may answer before the voice path is "cut-
through," and the caller is not heard. If the time is too short, a standard telephone user
inputting DTMF tones could be cut off prematurely from using other features, such as Speed
Dial or Toll Restriction.
Standard telephones can also defeat Toll Restriction if the seize time is too short and they are
not required to dial outgoing calls via Least Cost Routing (LCR). Toshiba recommends that
standard telephones should always be required to dial outgoing calls via LCR to prevent them
from defeating Toll Restriction.
Note
3-30
For Timed Break Recall (TBR) Data = 1 (0.1 seconds must be set. If Earth Recall is
required Data=2 (2 seconds) must be set for the correct operation of this feature in
the United Kingdom.
If no digits are dialled after accessing an outgoing Exchange line, the DTMF
receiver remains seized for 15 seconds and then drops; however, the line remains
connected.
Program 12 System Assignments, Basic Timing
Strata DK40 Programming Manual Spring 1999