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Example: Converting a Channelized OC12 IQ PIC to a Channelized STM4 IQ Interface

 

The JUNOS software allows you to convert a Channelized OC12 IQ PIC into a channelized STM4 IQ interface. The conversion process enables the Channelized OC12 IQ PIC to interconnect with European SDH telecommunications equipment at the STM4 and STM1 levels, then channelize the data into North American T3, T1, and NxDS0 interfaces. To place the Channelized OC12 IQ PIC in SDH mode, include the sdh option at the [edit chassis fpc slot-number pic pic-number framing] hierarchy level.

Figure 1: Channelized OC12 IQ Interface in SDH Mode Example
Channelized OC12 IQ Interface in SDH
Mode Example

Figure 1 and the following configuration example show how the converted channelized STM4 IQ interface can be turned into a clear channel STM4 (VC4-4c) SDH interface, or further subdivided into STM1 (VC4) interfaces and channelized administrative unit 4 (CAU4) interfaces, T3 and channelized T3 interfaces, T1 and channelized T1 interfaces, and NxDS0 channels.

Router A

Figure 2 shows a visual representation of the T3/channelized T3-to-STM4 SDH mapping method used by the JUNOS Software for channelized OC12 IQ interfaces configured in SDH mode.

Figure 2: Converted Channelized OC12 IQ Interface SDH Mapping Method
Converted Channelized OC12 IQ Interface
SDH Mapping Method

Verifying Your Configuration

To verify correct operation of a Channelized OC12 IQ PIC converted to a channelized STM4 IQ interface, use the following commands:

  • show interfaces

  • show interfaces controller

To view the interface names of the physical channelized STM4 IQ interface and the resulting interfaces configured on the channelized IQ interface, use the show interfaces controller and show interfaces terse commands:

user@host> show interfaces controller cstm4-0/0/0

 

user@host> show interfaces terse *-0/0/0*