User's Manual

Menus and Parameters
2-39
BreezeACCESS 4.0 System Manual
The SU is deleted from the Call Information database once it sends a
message that the call was terminated. Throughout the voice call, the
SU periodically transmits keep-alive (re-association) messages
approximatly every ten minutes indicating that the call is still on. If
such messages are not received for a period defined by the Call
Aging Time parameter, the following will take place.
a. The AU deletes the SU listing from the Call Information
database assuming that the call was improperly terminated
(e.g. reset or loss of synchronization).
b. For non-ACSE voice calls, a prioritized channel is no
longer allocated to the voice packets (although voice packets
will still get a relatively high priority).
c. ACSE voice calls will be terminated (no slot will be
allocated for the call).
The allowed range for the Call Aging Time parameter is 1 (no aging)
or 2-50,000 seconds. It is recommended to configure a call aging
time of at least 1200 (20 minutes).
The default value is 1800 seconds.
! Maximum Voice Sessions – Applicable only for an AU that provides
services to Subscriber Units with voice capabilities. When the ACSE
voice scheduler option is enabled, this parameter is not applicable
and instead the Maximum ACSE Voice Sessions parameter is
used. The value of the Maximum Voice Sessions parameter
specifies the maximum number of simultaneous voice sessions that
can be conducted by the SUs associated with this AU. If the number
of active voice sessions reaches this number, any additional SU
trying to initiate a voice session shall not get a dial tone. As this
value increases, voice quality may deteriorate as more users share
the same bandwidth for voice sessions.
The selection range is from 0 to 50.
The default value is 12.
! Receive Attenuation Control (SU-A/E units) – Displays the
current attenuation introduced into the receiver circuits and allows
entry of a different attenuation value.
The available Receive Attenuation values are 0 dB (no attenuation),
10 dB and 25 dB. The effect of inserting such attenuation in the
receive circuit is equivalent to reducing the level of the received
signal (including both signal and noise) by 2 dB when selecting 10
dB attenuation and 12 dB when selecting 25 dB attenuation.
The default is 0 dB.
NOTE:
A voice session is defined as a voice connection between an SU and an AU. A
session between two SUs that are served by the same AU is counted as two voice
sessions.