User guide
Chapter 12: Trunk Configuration
152 MAXCS ACC 6.7.1 Administration Manual
Figure 85. Triton Analog Trunk GS/LS Properties window
Note that you can use Apply to in this dialog box to apply changes to other trunks of
the same type.
Parameter Description
Interface Type
Select the type of trunk that will interface with this trunk
channel:
• Loop Start Trunk
• Ground Start Trunk
Incoming Ring
Single – Default setting for North America
Double – For countries using Ring-Ring-Silent type of ring
pattern
Impedance
The resistance of electrical current to alternating current,
measured in Ohms. Impedance occurs when power or signal
is transferred from one circuit to another. When a trunk in-
terface impedance is greatly mismatched with the CO analog
line, it may result in static noise and echo heard by IP phone
users. The system automatically selects the impedance pro-
file that best matches the Triton trunk interface with the CO.
In the rare case where you are not getting the best match,
you can disable this feature by checking Disable Imped-
ance Match During System Startup, and you can set the
Impedance manually.