6TANTP514-1E
TOTAL ACCESS 3000/3010
NTP-514
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3000/3010 System Manual
© 2002, ADTRAN, Inc.
Table 2. Protection Configuration Option Settings
Protection Options
Settings
Description
Protection Mode ........................................... Auto ................................... System automatically switches from Main to AUX with
no user intervention. Switch is initiated by loss of sync
on Main or exceeding BER Threshold. Alarms and
switchover notification are generated via the SCU.Auto
Mode also allows reversion back to Main once sync is
re-established or the error count drops below the BER
Threshold.
Auto Hold .......................... Auto Hold provides system protection identical to Auto
Mode, except that reversions are not allowed to the Main
without user intervention. Once switchover has occurred
to the Aux circuit, data can only be reverted by
modifying any option on the terminal screen or by the
pushbutton on the faceplate of the HTU-C.
Manual Main ..................... Manual Main requires manual switchover the AUX
circuit by user intervention. Switchover can be
accomplished via the faceplate pushbutton or the
terminal screen. The SCU will make notification of a
Main circuit failure, but will not report switchover until
the data is manually switched to the Aux circuit.
ManualAux ........................ Data is manually forced to the AUX circuit and will
remain there until the mode is changed via the terminal
screen or by pushbutton on the faceplate. All other
option settings are ignored while in this mode.
Manual Dis ........................ In the Manual Dis mode, the Main and AUX circuits act
as two independent units. Separate data can run on either
circuit without affecting the operation of the other. All
other option settings are ignored while in this mode.
Minimum Hold-in Time .............................. 1-99 minutes ...................... Defines the minimum time that data will remain on the
Aux circuit. This option is only valid when in Auto or
Auto Hold Protection Modes.
BER Threshold ............................................. 1E-4, 1E-5, ........................ Allows the user to set the Bit Error Rate that will cause
switchover from the Main to AUX circuit when
exceeded. BER Threshold can also be set from the Main
card’s protection configuration and should coincide with
the settings used on the AUX card.
BER Interval ................................................ 5, 10, 15 minutes ............... Defines the interval over which errors will accumulate
for comparison with the BER Threshold setting. BER
Interval can also be set from the Main card’s protection
configuration and should coincide with the settings used
on the AUX card.
Lock-in Hours .............................................. 0-99 .................................... Defines duration of lock-in to the AUX circuit upon
reaching the Switch to Aux Limit.
Switch to AUX ............................................. Limit1-9 ............................ Defines the number of times APS can switch from Main
to AUX over the defined Lock-in Check Interval before
the system is locked to the AUX circuit for the defined
Lock-in Hours.
Lock-in Check Interval ................................ 1-99 .................................... Defines the interval over which the Switch to AUX Limit
is compared before locking in the APS to the AUX
circuit for the Lock-in Hours duration.
1E-6, 1E-7