Specifications

Trunk Ports
The Trunk Ports is the logical range of the sum of B and D
channels. Each physical ISDN port occupies three Trunk
Ports, two B and one D channels. User only needs to specify
the B channel number here, since D channel is reserved in
the 3
rd
trunk port for each physical ISDN port. E.g. Assume
there are four ISDN ports in the PBX and no other FXO/FXS
modules installed, then one can set each pair of numbers
here, like 1,2 but excluding 3,6,9,11.
) If a four-port FXO/FXS module is also installed, then
the Trunk Ports here should be numbered from 5 to 16
instead of 1 to 12. Make sure to specify the indices of
ports correctly, or PBX will not start. One can refer to
the POTS Setting page before configuration.
Description Arbitrary description information.
Port Selection
Select to search for an available port in the group. Rotating
means to force ports being selected by turns to even cost.
Signalling
Select Point to point or Point to multipoint depends on
the link type between ISDN service provider and your
device.
Switch Type Supports European switch type by default.
Outbound Routegroup
15
Selects a routegroup to associate routes with this trunk.
Outbound calls match included route patterns could employ
this trunk to access ISDN.
) There may not be any 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, selects an extension from the list to be
an unconditional destination for incoming calls to this trunk.
Or click By Number and then enter configurations in DID
Prefix and DID Stripping to have the incoming calls
directed to the corresponding extension derived by number
manipulation. The ISDN numbers of the included ports are
15
Please refer to 4.5 for details.
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