AltiGen comm ACM 5.1 - Manual (Page 175)

Chapter 12: Trunk Configuration
AltiWare ACM 5.1 Administration Manual 161
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 interface 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 profile 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 Impedance Match During System
Startup, and you can set the Impedance manually.
Match Impedance
button Changes the Impedance setting to the best match for the
selected trunk channel, and then measures noise and
returned echo with this impedance setting. Results are
displayed in the Diagnosis section of the dialog box. The
system automatically runs a matching test upon system
startup, unless you disable the feature. If later you
connect a new analog line to an empty port or replace an
existing line, you need to click this button to best match
the impedance.
Match Result button Shows the result obtained the last time the Match
Impedance button was clicked for that trunk.
Disable Impedance
Match During System
Startup Check to disable automatic impedance matching during
system startup.
Caller ID Receiving Select as None, FSK or DTMF for receiving caller ID
digits. For North America, the caller ID is FSK signal on
analog trunk.
Centrex Flash
Duration (ms) Specifies the Flash Duration time in milliseconds, with a
range from 150 ms to 1000 ms.
Out of Service With
Trunk Seizure When checked, if the trunk is set to Out of Service, the
system will busy out the trunk. The CO will treat this trunk
as a busy line and WILL NOT place a call to this trunk. (By
default, this option is unchecked.)
Enable Dial Tone
Detection (Outgoing) When enabled, the trunk channel must detect outgoing
dial tone prior to making the call.
Enable Answer
Debounce (Incoming) Enables a timeout period of 2 seconds (for ignoring false
CO disconnect signal), after answering an incoming call.
Loop Break Duration
(ms) Disconnects signal if CO breaks loop current. You can set
the duration from 200 to 1000 ms. 600 ms is common in
North America.
Parameter Description