Instruction manual

ACU-1000 Operations Manual
2-104 Interoperability Now
2.17.3.11 Outgoing Ring Timer
The length of time the PSTN module allows the phone being called to ring is set by this
configuration item. The selection options are: no ring, a 30 second ring (factory default), a 1
minute ring, or a continuous ring. When set for 30 seconds or one minute, the call will time-
out if not answered before the ringing time elapses. If Outgoing Ring is set to “no ring,” no
outgoing calls are allowed. This feature is useful, for example, if the PSTN is connected to a
satellite terminal and, while it’s important to receive incoming calls, the system operator does
not want to pay for outgoing calls. If set for continuous ring, the incoming call does not time
out and the phone will continue to ring until the call is terminated by the originator.
2.17.3.12 DTMF Command Enable
This configuration item determines whether an ACU-1000 module considers any DTMF
characters present in its input audio to be commands meant for the module. When DTMF
commands are disabled, they’re blocked from passing through the module. Instead, the DTMF
characters are detected and muted, but are not considered as commands to the receiving
module. The default factory setting is DTMF Commands enabled. In this mode, the DTMF
characters are still detected and muted, but the receiving module assumes they are incoming
commands and responds accordingly. See Section 2.17.2.5 for proper DTMF Mute Timer
adjustment, and Section 3.5.1.9, which explains the Data and Normal modes, which can be
used to temporarily control the use of DTMF input, without having to enter the programming
mode.
2.17.3.13 Inactivity Disconnect Timer
The Inactivity Disconnect Timer disconnects a PSTN module user from the ACU-1000 system
if no activity is detected on the line. This prevents the connection from being tied up if a
telephone user forgets to give the “Disconnect” command or the connection is otherwise lost
without notification to the system. This timer measures how long there is no speech or DTMF
characters present in audio sent to the PSTN receive audio input. If there’s insufficient activity
so the VOX is not tripped before this timer expires, the connection is terminated by the ACU.
This timer is reset whenever the VOX is tripped. When using the PSTN-2 to monitor audio
from another module for an extended time, set timer to off.
Selections available are: None (the connection will not be terminated due to inactivity no
matter how long), 30 seconds, 1 minute, 2 minutes (factory default), 5 minutes, and 10 minutes.
2.17.3.14 Voice Prompt Initiation Delay
A delay can be added to the onset of system voice prompts. Different delays can be added to
any of the interface modules. This variable delay is mainly used to compensate for slow-to-
react equipment associated with a module. For example, if a local radio associated with a DSP-
2 module has a long settling time after its PTT is activated, it may be necessary to delay all
voice prompts transmitted via the DSP-2. When additional delay is required, the distant radio
user will not hear the beginnings of system voice prompts.
The default is no delay.