OSC
(ONS 15454 SDH and ONS 15454 M6 only) Use the OSC subtab to view, create, edit, and delete DWDM OSC terminations and DWDM ring IDs. The OSC is a bidirectional channel connecting all nodes in a DWDM ring. The channel carries clock synchronization and orderwire channel communications for the DWDM network. It also provides transparent links between each node in the network. The OSC is an STM-1 formatted signal that uses the 1510-nm wavelength and does not affect client traffic. The DWDM ring ID is the unique identifier for ONS node DWDM rings.
 
Item
Description
OSC Terminations
Displays the OSC terminations that have been created:
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Port: Displays the slot and port where the OSC is provisioned.
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Service State: Indicates the OSC port service state. Service states appear in the format: AdministrativeState-OperationalState, StatusAttribute. For additional state information, see States.
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LAPD Terminations: If the OSC is provisioned as OSI only, the OSC LAP-D parameters appear:
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AITS/UITS—Indicates the LAP-D acknowledgement type, either AITS (Acknowledged Information Transfer Service), or UITS (Unacknowledged Transfer Service).
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Network/User—Indicates the LAP-D frame command/response role, either Network or User.
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MTU—Shows the size of the maximum transfer unit. The range is 512 to 1500 octets.
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T200—Shows the time between Set Asynchronous Balanced Mode (SABME) frame transmissions. The range is 0.2 to 20 seconds.
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T203—Shows the maximum time between LAP-D frame exchanges. The range is 4 to 120 seconds.
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OSI SNPA: If the OSC is provisioned for OSI, subnetwork point of attachment (SNPA) information appears:
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Router—Indicates the ONS router and NSAP address.
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Router State—Indicates whether the router is enabled or disabled.
Create
Displays the Create OSC Termination dialog box to create a new OSC termination.
Delete
Deletes the OSC termination highlighted in the OSC Terminations list.
DWDM Ring ID
Displays DWDM ring information:
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Ring ID: The DWDM ring ID.
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West Direction: Displays the OSCM or OSC-CSM card used for the DWDM west line.
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East Direction: Displays the OSCM or OSC-CSM card used for the DWDM east line.
Create
Displays the Create DWDM Ring dialog box to create a new DWDM ring.
Edit
Displays the Edit DWDM Ring dialog box to edit the highlighted DWDM ring.
Delete
Deletes the highlighted DWDM ring.
Help
Displays context-sensitive help.

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