Specifications
Reference Guide 6-21
WAN Card WAN Card User Screens and Settings
LB DET
This option allows the card to detect DS1 channel, and ANSI T1.403 (8015 WAN only)
loopbacks. When set to off, no T1 loopbacks can be detected. When set to on, T1 loopbacks
will be detected and maintained until a loop down is detected. The with/time-out (w/to) is the
same as on except that if no loop down is detected after 10 minutes, the loopback will
self-termiante.
Currently WAN card with ESF Loopback is the only card that detects ANSI T1.403 loopback
commands. The other WAN cards will only respond to “in-band” loopback codes. If the WAN
is a loopback due to a command from a remote device, the loopback will be dropped if you
switch to
off
.
ESF/NMS RP
This setting specifies the format in which performance statistics for the T1 link will be
gathered and stored in the system. In ESF mode, these performance statistics are accessible to
the carrier over the Facilities Data Link (FDL) as well as through the user interface. The
options are
none
,
at&t
,
ansi
,
c-fdl,
c-b7r
and
e-fdl.
The
at&t
option requires the statistics be
gathered in accordance with AT&T Publication 54016 whereas the
ansi
option requires the
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
.