The WAN Physical Configuration Screen
WPIM-DI Local Management Guide
2-5
NI/DI Loopback
Displays the loopback for the WPIM-DI. Loopback is a testing procedure
that segments the line and allows the user to isolate faults. This field
toggles between None, Line-Loop, and Payload-Loop. In Line-Loop the
entire T1 is looped back. In Payload-Loop only the 24 timeslots are
looped back. The NI/DI Tx Clock Source must be in Loop Timing mode
to use this option. The default setting is
None
.
DI Enabled
Displays the status of the Drop-and-Insert function of the WPIM-DI. This
field steps between On, Off, and diDataEnable. Choosing On allows
another device (e.g., WPIM-T1) that is connected to the DI interface of
the WPIM-DI to use any timeslots that the WPIM-DI is not using (Drop
and Insert is enabled between the two ports). The data from the host
device passes through the NI port. Choosing Off allows the Network
Interface to be used as a standard T-1 port. Choosing diDataEnable
enables Drop and Insert, and data from the host device will pass through
the DI port. The default setting is On.
2.1.2.1
WPIM-DI Timeslot Configuration Table
The WPIM Timeslot Configuration table allows you to configure the way
in which the WAN module uses the T-1 line. The configuration table
consists of 24 Timeslots. You must assign each Timeslot an Interface
number (for example, 002 for an active Interface number or 000 if the
Timeslot is not used). When you lease an entire T-1 line, you can use all
24 Timeslots (the full T-1 bandwidth). If you lease only a fraction of the
T-1, the service provider tells you which Timeslots to use.
The WPIM-DI supports Time Division Multiplexing (TDM) allowing
channelization of circuits (Timeslots) within the public network. You can
use Timeslots any way you choose. When using the WPIM-DI, you have
the option of implementing all the available leased Timeslots with the
WPIM-DI, or you may map any of the available Timeslots to another
WAN module through the DI interface.
NOTE
When the diDataEnable option is selected in the DI Enabled
field, data from the host device passes through the DI port and
not the NI port on the WPIM-DI.
