Verilink 1558D (34-00255) Product Manual - Manual (Page 33)

LAPS Operation 4-7 1558D APS CSU/DSU
validity of the loop command. It is possible for the user to
specify a loop that is illegal (i.e. looping the active line). No
error message will be generated but the illegal action will
not be executed. The choices are: Near Payload, Near Line,
Near Facility, Near Equipment, Far Payload, Far Line, CSU,
and Net. If the unit has been configure for “CSU Mode Dis-
abled”, the only loop available for the “Far” unit is NPC
Payload. Note that Far items are only valid if unit is config-
ured for Master operation. Loop descriptions and operation
are discussed on page 4-9.
When ‘Net’ is chosen as the type in the Loop or
Unloop field, the user has the option of specify-
ing the 5-bit pattern to be transmitted. Using the
arrow keys or cursor control commands, the user
may move the cursor to the bit field. A five-bit
pattern of 1s and 0s may then be typed by the
user.
Unloop: Takes down the specified loop. If the loop is con-
trolled by ESF data link commands, the response is immedi-
ate, If the command is an inband command, the response
takes a minimum of 5 seconds.
Pattern: Specifies which pattern will be transmitted during
test. When the 3 or 5-bit, user-defined pattern is chosen, the
user may type in any pattern of ones or zeros to be transmit-
ted. Pressing with the cursor positioned on this field
will cause the pattern to be transmitted for the period of time
specified in ‘Test Time’. The choices are: QRSS, 1:8, 3:24,
all Ones, all Zeros, user definable 3-bit, and user definable
5-bit.
Test Time: Defines the run-time of test pattern generation
and error accumulation and starts the test. Pressing
with the cursor positioned on this field will cause the
selected pattern to be transmitted for the specified period of
time. If the Maintenance menu is exited, pattern testing is
halted. The choices are: 15 Minutes, 30 Minutes, 45 Min-
utes, 1 Hour, and Continuous.
Runtime: Shows the amount of time elapsed since a timed
Pattern test began. Note that this field only appears on the
screen when a test is running.
Near CRC Errors: A display-only field for viewing the
number of CRC errors which are received at the Near Target
receive path.
Far CRC Errors: A display-only field for viewing the
number of CRC errors which are received at the Far Target
receive.Far CRC Errors are only reported if the 1558D is
configured as a Master. Slave 1558D units do not report Far
CRC Errors.
Reset Errors: Pressing with the cursor positioned
on this field causes both the Near and Far CRC accumula-
tors to be cleared.
Configuration Screen
The Configuration Screen (Figure 4-8) allows the user to
both view and set the configuration parameters for the
1558D equipment. A circuit may be configured at anytime,
before or after the hardware is installed. To implement
changes in the unit configuration, first place the Service
State to the Out of Service or Unused state. The LAPS soft-
ware will not allow a user to change the configuration of an
IN SERVICE unit. Once one or more fields have been modi-
fied, the user must press or attempt to exit the
screen by pressing . The user will then see the prompt
“Accept changes?” (Y/ N)’. If the user responds by pressing
, only then will the configuration changes take effect. A
response of will cause LAPS to ignore all requested
changes and to restore the original unit configuration param-
TxPORT 1559 APS Manager Date: MM/DD/YY
LOCAL ACCESS Time: HH:MM:SS
Ver. 3.XX
-------------------------------- Configuration ---------------------------------
Shelf/Position: [1.01] Circuit A: HICAP 1234
Net End: [NEAR] Circuit B: HICAP 5678
Service Status: [Out of Service]
Revision:1.00/1.00 Type: APS1558D
------------------------------------ Actual ------------------------------------
Errored Seconds: [20] Speed Multiple:64Kb
Consecutive SES: [2] Clock: Network
Line Avail. Timer: [60] DSU Speed: 768 Kb
LOS State: [ON] DS0s: Alternate
LOF State: [ON] Data Invert: OFF
Revert: [OFF] Control Lines: ON
Fac. Side A linecode: [B8ZS
Fac. Side B Linecode: [B8ZS]
A: LBO Level o dB
B: LBO Level o dB
Boot from: Switches
----------------------------------- Messages -----------------------------------
Alarms
Test
Shelf/Pos:
Figure 4-8 Configuration