Specifications

7-26
Reference Guide
Model No.
Running Head
WAN Card User Screens and Settings WAN Card
ANSI T1.403 specification be used. Performance statistics are also available for D4 formatted
T1 lines. See the “T1 Performance Monitoring” section later in this chapter for more detailed
information on this topic.
The choice of
c-fdl
disables telco-side capability to access performance-monitoring
information. The
c-fdl
option sends and receives network management information over the
facility data link. The
c-b7r
option sends and receives the same information over time slot 24
on the T1 WAN link highlighted. The
e-fdl
option sends and receives T1 ESF-encapsulated
network management information over the FDL.
EER THRHD
The Excessive Error Rate Threshold selects the error rate, which an alarm is declared. This
setting interacts with the EER setting in the Alarm Filters of the system. The options are
10e-4
through
10e-9
, or
none
.
RDNT RULES
The selection of Redundancy Rules will define the method of determining what event will
trigger a WAN port to switch to its redundant mate. The options are
none
,
OOS,
and
CGA
.
GROUP
The Group setting identifies a method of link-fail alarm propagation from upstream trunks to
downstream tributaries when the system is configured for alarm transcoding.
The selection of a group is a two-step process. After identifying the group number (
1
to
4
),
select the secondary group (
A
[child group],
B
[child group] or
C
[parent group]).
Figure 7-26 shows two system units with "parent-child" groupings. The child groups are
designated as "A" and "B." The parent groups are designated "C”. Using WAN Groups
Figure 7-26. Using WAN Groups
System #1
Trunk
System #2
Device #1
Device #2
W1-1 (A)
Tributary
W1-2 (B)
W3-1 (A1)
Tributary
W3-2 (B1)
(C1)(C)
W2-1