Configuring Vo ic e 13-13
Jitter specifies the amount of jitter delay, which is used to compensate for the variable
arrival time of frames. Inconsistent arriv al can result in a choppy voice q uality.
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 fo r 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 P refix
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 shoul d be
used only if it can be cert ain that background noise will be low or all of th e voice trans-
mitted will be sufficiently louder than the background noise.
1 = no suppressi on 2 = low suppression 3 = medium suppression
4 = high su ppress i o n 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 le ngth dialing feature fo r
this channel, regardless of the Dial Timer setting.
Auto Dial Numbe r
is a number to wh ich the SmartSwitch 1800 will attempt to connect when the handset
(or its equivalent) attached to this port is taken off-hook, if Auto Di al is set to Y.
The SmartSwitch will automatically dial the long-form number defined in the speed -
dial m ap ta ble configuration that is associated with the speed dial number specified
here.