Configuring Fractional E1 IQ Interfaces

By default, all the time slots on a channelized E1 interface are used. To configure a fractional E1 interface on a Channelized STM1 IQ or IQE PIC, you must perform the following tasks:

1. Include the no-partition and interface-type statements at the [edit interfaces cstm1-fpc/pic/port] hierarchy level, specifying the cau4 interface type. This converts the channelized STM1 interface into a channelized AU-4 interface. The resulting interface name is cau4-fpc/pic/port:

   [edit interfaces cstm1-fpc/pic/port]

   no-partition interface-type cau4;

2. Partition the channelized AU-4 interface into E1 interfaces by including the partition and interface-type statements at the [edit interfaces cau4-fpc/pic/port] hierarchy level, specifying the e1 interface type. The partition number is the sublevel interface partition index and is correlated with the channel number. For channelized E1 interfaces, the partition number can be from 1 through 63. The interface type is the channelized interface type or clear channel you are creating. For channelized AU-4 interfaces, type can be ce1 or e1. This configuration creates interface e1-fpc/pic/port:channel:

   [edit interfaces cau4-fpc/pic/port]

   partition partition-number interface-type e1;

3. Configure the number of time slots allocated to the E1 IQ or IQE interface by including the timeslots statement at the [edit interfaces e1-fpc/pic/port:channel e1-options] hierarchy level. NxDS0 time slots configured on either a channelized STM1 IQ or IQE interface or channelized E1 IQ or IQE interface are numbered from 1 to 31 (0 is reserved), while fractional E1 time slots range from 2 to 32 (1 is reserved). To configure ranges, use hyphens. To configure discontinuous time slots, use commas. Do not include spaces.

   [edit interfaces e1-fpc/pic/port:channel e1-options]

   timeslots time-slot-range;

Note: For channelized STM1 interfaces, channel numbering begins with 0 (:0). For channelized STM1 IQ or IQE interfaces, channel numbering begins with 1 (:1).

For more information about E1 time slots, see Configuring Fractional E1 Time Slots.

Example: Configuring Fractional E1 IQ Interfaces

Configure a fractional E1 interface that uses time slots 2 through 10:

For a full configuration example, see the JUNOS Feature Guide.

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