To create VT15 (TU11) or VT2 (TU12) sub-channels

Before you begin

A SONET VTG and an SDH TUG2 are equivalent groups. A VTG contains four VT15 channels or three VT2. A TUG2 contains four TU11 channels or three TU12. An SDH TUG 3 has no SONET equivalent, however, it contains seven TUG2. (An STM1/AU4 contains three TUG3). See Comparison of SONET and SDH hierarchies in SONET and SDH sub-channel applications and structure .

An STS1 channelized to carry a VT15 or VT2 payload type contains seven VTG. An AU3 or a TUG3 channelized to carry a TU11 or TU12 payload type contain seven TUG2.

Each VTG (TUG2) supports up to four VT15 (TU11) channels or three VT2 (TU12) channels.

Steps
 
1 

Complete To configure SONET sub-channels or To configure SDH sub-channels to carry a VT15 (TU11) or VT2 (TU12) payload type.

2 

To create a VT15 (TU11) channel, perform the following steps:

  1. Choose Equipment from the navigation tree view selector.

  2. Right-click on the device where you want to create a VT15 (TU11) channel and select Properties. The Network Element (Edit) form opens.

  3. On the Network Element (Edit) form navigation tree, expand the Shelf icon.

  4. Expand to the channel level, right-click on a VTG or TUG2 channel group that is to carry a VT15 (TU11) payload and choose Create Channel. The SONET VT (SDH Tu) Channel (Create) form opens.

  5. Configure the required parameters.

    Set the Local Channel ID to a value in the range 1 to 4 since there are four VT15 (TU11) in a VTG (TU2).

    The default payload type for a VT15 (TU11) channel is PDH DS1. There is no other available payload type.

  6. Click OK. A VT15 channel is created under the VTG or a TU11 channel is created under the TUG2 in the navigation tree.

  7. Right-click on a VT15 or TU11 channel and choose Create Channel. The DS1/E1 Channel (Create) form opens.

    The Local Channel ID is equal to the VT15 channel Local Channel ID parameter and the channel type is set to DS1 since a VT15 or TU11 channel supports one DS1.

  8. Click OK A DS1 channel is created under the VT15 or the TU11 in the navigation tree.

    You can create up to 28 VT15 (TU11) channels on a VTG (TUG2).

  9. Repeat Step 1 and Step 2 for each VT15 (TU11) channel that you want to create.

  10. Since a DS1 channel is not used as a SAP, create a DS0 group for each DS1 channel created. Go to Step 11 of To create TDM DS3 channels .

3 

To create a VT2/TU12 channel, complete these steps:

  1. From the navigation tree, select a VTG or TUG2 channel group to carry a VT2 (TU12) payload and choose Create Channel. The SONET VT (SDH Tu) Channel (Create) form opens.

  2. Configure the required parameters.

    Set the Local Channel ID to a value in the range 1 to 3 since there are three VT2 (TU12) in a VTG (TUG2).

    PDH E1 is not available for SONET framing.

  3. Click OK. A VT2 channel is created under the VTG, or a TU12 channel is created under the TUG2 in the navigation tree.

  4. Right-click on the VT2 or TU12 channel and choose Create Channel. The DS1/E1 Channel (Create) form opens.

    The Local Channel ID is equal to the VT2 channel Local Channel ID parameter, since a VT2 channel supports one E1 or DS1.

  5. Click on the States tab and configure the Administrative State parameter.

  6. Click OK. A DS1 channel is created under the VT2 in the navigation tree. An E1 or DS1 is created under the TU12. You can create up to 21 VT2 (TU12) channels on a VTG (TUG2).

  7. Repeat Step 1 and Step 2 for each VT2 (TU12) that you want to create.

  8. Since a DS1/E1 channel is not used as a SAP, create a DS0 group for each DS1 or E1 channel created. Go to Step 11 of To create TDM DS3 channels .

End of steps