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Configuring Voice 13-13
Jitter
specifies the amount of jitter delay, which is used to compensate for the variable
arrival time of frames. Inconsistent arrival can result in a choppy voice quality.
Increasing the jitter buffer size will increase the end-to-end delay, but will insure
smoother voice quality.
Call Timer
is the amount of time the SmartSwitch 1800 will wait for a response to a Call Connect
or Call Clear request. When the SmartSwitch issues the Call Connect or Call Clear
request, it will set a timer to the value configured here. If that timer expires with no
response from the destination, the SmartSwitch will generate a busy tone.
Long Dial Prefix
is a character that will be required preceding calls using the long-call format (i.e.,
when a speed-dial number is not used). When the user at an attached device (e.g., tele-
phone or Fax machine) dials a long-form number, s/he must precede the number by
the
Long Dial Prefix
.
Selecting this parameter will display a table of the following values. Specify a value
by entering the corresponding letter from that table:
A
=0
D
=3
G
=6
J
=9
B
=1
E
=4
H
=7
K
=* (asterisk)
C
=2
F
=5
I
=8
L
=#
Suppression
is a level of suppression of background noise. For most calls, low suppression (
2
)
should be sufficient. The higher the suppression level, the greater the possibility that
low-volume voice will be lost; therefore, suppression levels higher than
2
should be
used only if it can be certain that background noise will be low or all of the voice trans-
mitted will be sufficiently louder than the background noise.
1
= no suppression
2
= low suppression
3
= medium suppression
4
= high suppression
5
= very high suppression.
A larger suppression level saves composite bandwidth, allowing more data channels
to operate simultaneously with voice channels.
Auto Dial Parameters
Auto Dial
Enables or disables the auto-dial feature of the SmartSwitch 1800. If auto-dialing is
enabled, the SmartSwitch 1800 will dial configured
Auto Dial Number
when the
handset attached to this Voice port is taken off-hook.
Enabling this parameter will disable the variable length dialing feature for
this channel, regardless of the
Dial Timer
setting.
Auto Dial Number
is a number to which the SmartSwitch 1800 will attempt to connect when the handset
(or its equivalent) attached to this port is taken off-hook, if
Auto Dial
is set to
Y
.
The SmartSwitch will automatically dial the long-form number defined in the speed-
dial map table configuration that is associated with the speed dial number specified
here.