Specifications

6-16 Reference Guide
Model No.
Running Head
WAN Card User Screens and Settings WAN Card
STATE
In the standby state, the WAN port is electrically disconnected from the network. Set this field
to
stdby
(standby) while configuring WAN links, and then change it to
actv
(active) when
starting normal operations. If the WAN is in loopback due to a command from a remote device,
the loopback will be dropped if you switch to
stdby
.
MODE
In bus-connect systems, WAN cards have two possible modes of operation, Terminal and
Drop-and-Insert. Terminal (
term
) mode is for channel bank applications. All time slots must
connect to a port on a user card or remain unconnected. Drop-and-Insert (
d-i
) mode
automatically connects all time slots on WAN link #1 to the corresponding time slots on WAN
link #2 of the same card. You can assign any or all of the time slots to voice and data ports by
overriding the automatic setup. See the System Operations chapter for more information about
using these two modes, and about time slot maps in general. In cross-connect systems, the
Mode automatically defaults to (
xcon
).
FORMAT
The Format setting specifies the framing to be used on the WAN link so that it matches the
framing used by the T1 carrier. Set the Format parameter based on the type of framing the T1
carrier requires. If you are using an external Channel Service Unit (CSU), the framing format
must match that of the CSU. The options are
d4
(normal superframe),
esf
(extended
superframe),
slc96
(subscriber loop carrier) and
slcd4
(subscriber loop carrier - D4).
Table 6-4 lists the DS0 time slots and their corresponding SLC

assignments, based on
Bellcore TR-TSY-000008.
LINE CODE
The Line Code setting matches the coding used by the T1 interface to that used by the T1
network. Set the Line Code to the type of coding used. If you are connected to an external
CSU, the line coding must match that of the CSU. The options are
ami
and
b8zs
.
PULSE
CSU modules with the Line Code configured for
ami
mode requires the WAN system or the
attached customer equipment ensure pulse density (also known as ones density). In
z15s
mode, the system will monitor the outbound data stream and will place a “1” in the 16th bit
position whenever it detects fifteen consecutive zeros. Obviously, this can lead to data
corruption. In the transparent mode (
trnsp
), the system will pass all incoming data (the DTE