Verilink 1558D (34-00255) Product Manual - Manual (Page 34)

LAPS Operation 4-8 1558D APS CSU/DSU
eters. If the screen is exited with a <N> response, reentering
the Configuration Screen will show that all fields have been
returned to their previous values.
Configuration Screen fields have the following functions:
Shelf/Position: Defines the circuit that is being configured.
This field may be changed by typing a new value or by
incrementing or decremented it with the <page down> and
<page up> keys, respectively. The unit is configured at the
factory for as address “Shelf 1.0”.
Net End: Defines which end of the circuit is being config-
ured or viewed. The choices are: Near / Far (Far only avail-
able if 1558D is configured as a Master)
Service Status: Indicates the service status of the circuit.
This field also determines if the remainder of the fields in
this screen can be changed or only viewed. The following
selections may be made for this field:
In Service: The circuit is currently in service and all alarm
and Call on Alarm features are functional. No
configuration parameters can be altered for a
circuit that is in service.
Out Service: The circuit is not currently in service. Alarms
will function but the LAPS will not show the
circuit on the Circuits In Alarm display. Also,
if the optional 1559 site manager is installed,
the 1559 will not initiate a Call on Alarm. All
other fields may be altered as described in the
following paragraphs.
Unused: No circuit has been defined for this Shelf/Posi-
tion.
Revision: This field displays the actual hardware and soft-
ware revision for this unit and the unit type (1558A, 1558D,
etc.).
Circuit A: This field displays the descriptive name/ID of
Line A of the pair of T1 lines connected to the 1558D.
Circuit B: This field displays the descriptive name/ID of
Line B of the pair of T1 lines connected to the APS.
Actual/Database: This display only field indicates to the
user when the configuration data is being obtained from the
card (actual) and when the information is not being obtained
from the card but from stored information in either the APS
manager or from the LAPS user interface (database).
Errored Seconds: This field is used to define the Errored
Seconds threshold for an APS service (as specified in
AT&T TR54017). The value may be set from 0 to 900. The
factory default value is 20 errored seconds.
Consecutive SES: This field is used to define the Consecu-
tive Severely Errored Seconds threshold for an APS service
(as specified in AT&T TR54017). The value may be set
from to 0 to 900. The factory default value is 2 consecutive
errored seconds.
Line Avail. Timer: This field sets the time interval for
which each path’s Line Activity Timer remains active. The
value can be set from 60 to 900 seconds. The factory default
is 60 seconds.
LOS State: This field determines if the circuit’s APS will
alarm on Loss of Signal error state. If On is selected, the
1558D will alarm immediately on LOS. The choices are:
Off / On. The factory default is ON.
LOF State: This field determines if the circuit’s APS will
alarm on Loss of Frame error state. If On is selected, the
1558D will alarm immediately on LOF. The choices are:
Off / On. The factory default is ON.
Revert: If this field is set to On, the 1558D will always
restore the APS service back to the NET A path when the
NET A path meets the following criteria; (1) no alarm con-
ditions are active on the NET A path, and (2) the Line Avail-
ability timer setting has expired (0 to 900 seconds, user
definable). The REVERT field can be set to either ON or
OFF. The factory default is OFF.
Fac. Side A Line code: Sets the facility side line coding
for Line A. The choices are: AMI / B8ZS. The factory
default is B8ZS.
Fac. Side B Line code: Sets the facility side line coding
for Line B. The choices are: AMI / B8ZS. The choices
are: AMI / B8ZS. The factory default is B8ZS.
LBO Level, A: Displays the option setting of the LBO
level select switch for network Line A. This field is a read
only field and may only be manually changed by the user
(see Installation on page 2-1). The factory default setting is
0 dB.
LBO Level, B: Displays the setting of the LBO level select
switch for network Line B. This field is a read only field and
may only be manually changed by the user (see Installation
on page 2-1). The factory default setting is 0 dB.
Speed Multiple: Displays the actual option switch setting
of the DSU speed multiple (56 or 64 Kb). The factory
default is 64 Kb multiples. This field is a read only field and
may only be manually changed by the user (see Installation
on page 2-1). The factory default setting is 1536 Kb.
Clock: This field display the DSU clocking mode has been
manually optioned (Internal, External or Network) by the
user. The factory default is NETWORK.
DS0s: This field displays whether the unit has been config-
ured for Alternate or Contiguous DS0 channel assignment.
The factory default is Contiguous.
Data Invert: This field displays whether the data invert
mode is ON or OFF. The factory default is OFF.
Control Lines: This field display whether or not the data
control lines are configured in the ON or OFF mode. The
factory default is OFF.