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The second kind of key systems dialling removes that lag and dials immediately through
the selected line.
Figure 3.4: Example image shows the Yealink T42G first line and dial pad circled in blue.
If your key systems environment supports both analog phone lines and has a SIP trunk
N
for additional calling capacity, making a call by using previously mentioned methods
could send a call through that SIP trunk.
This happens when you try to place an outbound call with classic PBX way of dialing
but all the analog lines are busy. System grabs the first line available, and if analog lines
are all busy, the call will be sent out via a SIP trunk.
3.5
Call barging
Call barging is a feature best described as a method which allows a third party to drop into an
ongoing call. In key systems environment this feature can be used with either inbound or
outbound calls on analog lines.
Basically, if you see that a call is active on one of the lines, press that same key to barge
in on that call. The parties already on the call will hear you and you will be able to hear them
which essentially makes this a specific way of conferencing.
By default, the system is not setup to allow call barging. If you want to turn this feature
N
on, please discuss with your IT administrator.
Chapter 3. Common use scenarios
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