Specifications

Trunk Ports FXO and FXS port indices grouped by this PSTN trunk, such
as 1 or 1,2 or 1-3, etc. Maximum port index depends on the
number of physical ports available.
Description Arbitrary description information.
Port Selection
Click to search for an available port in the group. Rotating
means to force ports being selected by turns to even cost.
Caller ID Detection Select to detect the Caller ID calling from PSTN lines.
Answering by Battery Reversal
Detection
If the PSTN service provides battery reversal, select to
count billable time starting from the call is answered.
) Clear the check box, if you are not sure whether the
PSTN service provides the function.
Outbound Routegroup
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Select a routegroup to associate routes with this trunk.
Outbound calls match included route patterns could employ
this trunk to access PSTN.
) There may not be appropriate routegroup to select
initially. One can come back later to revise it, once the
expected routegroup is added.
DID of Extension When enabled DID, clicks an extension in the list to be an
unconditional destination for incoming calls to this trunk. The
PSTN numbers of the included ports are therefore regarded
as the direct line numbers of the extension. If FXS is
selected in the Trunk Type list, you can also click By
Number or By Privilege, and then enter configurations in
DID Prefix and DID Stripping to have the incoming calls
directed to the corresponding extension or trunk derived by
number manipulation. The PSTN trunk numbers is therefore
regarded as the direct line of the extension.
) If you set a DID extension in trunk, then only that
extension can use this trunk to call out, and all other
user’s call in this trunk will connect to that extension.
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Please refer to 4.5 for details.
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