Protection


Use the Protection subtab to view, create, edit, and delete node protection groups.

Item

Description

Type

Displays the protection group type:

  • 1:1: (ONS 15310-CL, ONS 15327, and ONS 15454 only) A working electrical card is paired with a protect electrical card of the same type. If the working card fails, the traffic from the working card switches to the protect card.

  • 1:N: (ONS 15454 only) Allows a single card to protect up to five working cards of the same DS-N level. A DS1N-14 card protects DS1-14 cards, a DS3N-12 card protects DS3-12 cards, DS3N-12E cards protect DS3-12E cards, and DS3i-N-12 cards protect other DS3i-N-12 cards.

  • 1+1: A working OC-N port is paired with a protect port of the same type.

  • Y Cable: (ONS 15454 only) A protection group for transponder or muxponder cards (TXP_MR_10E, MXP_2.5G_10E, TXP_MR_10G, MXP_2.5G_10G, TXP[P]_MR_2.5G, and MXP[P]_MR_2.5G) that are connected to a Y-cable. The cable splits the single client signal, sending one signal to the working transponder or muxponder card, and the second signal to the card.

  • Splitter: appears automatically when a TXPP_MR_2.5G or MXPP_MR_2.5G card is installed. These cards contain two trunk ports that provide trunk-side protection in DWDN networks.

  • 1+1 Optimized: (ONS 15454 only) A line-level protection scheme using two lines, working and protect, for the OC-3-4 and OC-3-8 cards. One of the two lines assumes the role of the primary channel, where traffic is selected, and the other line assumes the role of secondary channel, which protects the primary channel. Traffic switches from the primary channel to the secondary channel are based on either line conditions or a switch performed by the user. After the line condition clears, the traffic remains on the secondary channel. The secondary channel is automatically renamed as the primary channel and the former primary channel is automatically renamed as the secondary channel.

Name

The protection group name. If the name is not defined by the user, the protect card slot and type appear.

Protect

The protect slot (for 1:1 and 1:N), or the protect card and port (for 1+1, optimized 1+1, and Y Cable).

Working

The working slot, card, and port.

Bidir Switch

Indicates whether a 1+1 protection group has bidirectional switching turned on. If it is on, both Tx and Rx signals switch to the protect port when a failure occurs to one signal.

Revertive

Indicates whether the protection group is revertive, that is, whether traffic reverts to the working card or port after failure conditions remain corrected for the amount of time entered in the Rev Time field.

Reversion Time (min)

The number of minutes that must pass before the traffic reverts to the working card. Traffic can revert when conditions causing the switch are cleared. Available when Revertive is checked for 1:1, 1+1, and Y Cable protection. Always available for 1:N and 1+1 Optimized protection.

Verification guard time (sec)

(1+1 Optimized only) The number of seconds allowed for a Force switch to be acknowledged by the far-end node. When the Force command is received, if no Lockout is present or if Secondary section is not in a failed state, then the outgoing K1 byte is changed to indicate Force and the verification guard timer is started. If a Force switch command is not acknowledged by the far-end within the verification guard timer duration then the Force command is cleared. The range is .5 to 1.

Recovery guard time (sec)

(1+1 Optimized only) The number of seconds that must pass before the system declares that a condition is cleared after a signal degrade (SD) or signal failure (SF). After the SD/SF is cleared on the line, the recovery guard timer starts. A recovery guard timer prevents rapid switches because of SD/SF. The range is 0s to 10s. The default is 1s.

Detection guard time (sec)

(1+1 Optimized only) The number of seconds that must pass before a traffic switch is initiated to a standby card after the detection of an SD, SF, loss of signal (LOS), loss of frame (LOF), or Alarm Indication Signal-Line (AIS-L) on the active card. The range is 0s to 5s. The default is 1 second.

Create

Displays the Create Protection Group dialog box to create a new protection group.

Edit

Displays the Edit Protection Group dialog box to edit the highlighted protection group.

Delete

Deletes the highlighted protection group.

Help

Displays context-sensitive help