The cOCx/STMx modules are generally used for circuit aggregration on the router. These line modules support the following controllers over OC3/STM1 or OC12/STM4, depending on the I/O module used with the line module:
Figure 8 shows the configuration parameters for a sample T1 over DS3 interface configuration.
Figure 8: Parameters for T1 over DS3 Interface Configuration

The following sample command sequence configures T1 over DS3 on a channelized SONET interface as described in Figure 8. See JUNOSe Physical Layer Configuration Guide , for details.
- host1(config)#controller sonet 3/0
- host1(config-controller)#path 12 oc1 4/1
- host1(config-controller)#path 12 ds3 1 channelized
- host1(config-controller)#path 12 ds3 1 t1
4
- host1(config-controller)#path 12 ds3 1 t1
4/2 timeslots 1, 3-8, 10-12
- host1(config)#interface serial 3/0:12/1/4/2