Item
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Description
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Name
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The overhead circuit name. The name can be alphanumeric and up to 48 characters, (including spaces). If you leave the Name field blank, CTC assigns a default name to the overhead circuit.
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Type
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Defines the overhead circuit type:
User Data - F1: Creates a user data channel (UDC) circuit on the F1 overhead
byte. A UDC circuit allows you to create a dedicated data channel between
ONS nodes.
User Data - D4-D12: Creates a creates a user data channel circuit on the
multiplex section (D4 to D12) overhead bytes.
Local Orderwire: Creates a local orderwire overhead circuit. Local orderwire
circuits require an AIC or AIC-I card at the source and destination node. You
cannot create local orderwire circuits if regenerators are used between ONS
nodes.
Express Orderwire: Creates an express orderwire overhead circuit. Express
orderwire circuits require an AIC or an AIC-I card at the source and
destination node.
DCC Tunnel - D1-D3: Creates a DCC tunnel on the SDH regenerator section
(D1 to D3) overhead bytes.
DCC Tunnel - D4-D12: Creates a DCC tunnel on the SDH multiplex section
(D4 to D12) overhead bytes.
DCC tunnels allow you to tunnel traffic from third-party equipment across
the ONS node network.
IP Tunnel - D1-D3: Creates an IP tunnel on the D1 to D3 regenerator section
overhead bytes. The IP tunnel takes SDCC traffic from non-ONS equipment,
encapsulates the traffic into the TCP/IP UDP (user datagram protocol) and
sends it across the ONS network to the other ONS node.
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PCM
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For orderwire circuits, sets the pulse code modulation (PCM) voice coding and companding standard, either MU_LAW (North America, Japan) or A_LAW (Europe).
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Maximum Bandwidth
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Sets a limit on the SDCC bandwidth allocated for IP tunnels to prevent degradation of ONS DCC processes. The percentage applies to the total SDCC bandwidth available.
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Next
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Displays the Circuits Source page.
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Cancel
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Cancels overhead circuit creation.
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Help
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Displays context-sensitive help.
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