Circuit Attributes


Use the Circuit Attributes page to define the type of overhead circuit that you want to create. The following table describes the Circuit Attributes page fields and buttons that appear for overhead circuits.

Item

Description

Name

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.

Type

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.

PCM

For orderwire circuits, sets the pulse code modulation (PCM) voice coding and companding standard, either MU_LAW (North America, Japan) or A_LAW (Europe).

Maximum Bandwidth

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.

Next

Displays the Circuits Source page.

Cancel

Cancels overhead circuit creation.

Help

Displays context-sensitive help.