Specifications

Reference Guide
7-25
WAN Card WAN Card User Screens and Settings
LB ADDR
The Loopback Address setting, when used in conjunction with the Channel Loopback setting,
specifies which time slot will be looped back. Only one time slot may be looped back at a time
for each WAN T1/E1 link. The options for T1 lines are
1
to
24
. For E1 lines, the options are
1
to
31
.
LB GEN
The Loopback Generate setting generates out-of-band diagnostic codes that are sent to the
remote equipment. These codes are ANSI T1.403 compatible with T1 networks, and allow
you to command a latching loopback at remote DS1 equipment. The options are
off
,
llb
(Line
Loopback),
plb
(Payload Loopback), and
nlb
(Network Loopback). The
plb
setting is a
loopback of the entire signal except the framing bits.
Selecting
off
generates a loopback deactivate command corresponding to the last activation
command generated. e.g. if you send a
plb
command and then send an
off
command, the
off
command would be payload deactivate. Note that the actual transmission of the command
happens after you press ‘
s
’ for
Save
. If you have already sent one of the loopback activation
commands, it is recommend that you send an
off
command before sending another loopback
activation command. e.g. this set of selections
plb, off, llb, off
transmits the following
commands: payload activate, payload deactivate, line activate, and line deactivate.
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-terminate.
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