2. E1 (SONET Framing, STS1)

A DS3 can be configured to carry an E1 payload (see Figure: OC3 Channelization using SONET and SDH, SONET framing branch).

To configure an E1 on an STS1 with a DS3 payload:

1. Create the STS1 path and set the payload to DS3.

2. Create the TDM DS3 with channelized E1.

3. Create the TDM E1.

Use the info command to display configuration information. In the example below, which applies only to the 2-port OC3/STM1 Channelized Adapter card, DS3 1 carries two E1 channels.

         sonet-sdh
             path sts1-1
                 payload ds3
                 no shutdown
             exit
         exit
         tdm
             ds3 1
                 no shutdown
                 channelized e1
             exit
             e1 1.1
                 no shutdown
             exit
             e1 1.21
                 no shutdown
             exit
         exit
         no shutdown

Notes:

• the CLI identifier for the path command is sts1-stsNum, where:

  • stsNum is between 1 and 3

• the CLI identifier for the TDM ds3 command is ds3Num, where:

  • ds3Num is equal to stsNum

  In the example above, DS3 is configured on sts1-1, hence the command ds3 1. If sts1-2 or sts1-3 was configured instead of sts1-1, the corresponding ds3 configuration would be ds3 2 or ds3 3, respectively.

• the CLI identifier for the TDM e1 command is ds3Num.e1Num, where:

  • e1Num is between 1 and 21 because a DS3 can carry 21 E1s