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loopback payload;

start-end-flag (filler | shared);

}

For DS0 channels on a channelized E1 interface, the clocking statement is supported only

for channel 0; it is ignored if included in the configuration of channels 1 through 11. The

clock source configured for channel 0 applies to all channels on the channelized E1

interface. The individual DS0 channels use a gapped 45-MHz clock as the transmit clock.

When you configure the clock source for a channelized interface—ds-fpc/pic/port:0, for

example—you must also include the channel-group statement at the [edit chassis]

hierarchy level, and specify channel group 0. For more information, see Clock Sources on

Channelized Interfaces.

Only a subset of the E1 options is valid for the channelized configuration; you specify the

time slots using the [edit chassis] configuration described in Examples: Interface Naming.

For more information about the E1 and DS0 options, see E1 Interfaces OverviewE1 Interfaces

Overview and T1 Interfaces Overview.

Each E1 interface has 32 time slots (DS0s), in which time slot 0 is reserved. You can

combine one or more of these DS0 time slots (channels) to create a channel group

(NxDS0). There can be a maximum of 24 channel groups per E1 interface.

Example: Configuring Channelized E1 IQ or IQE Interfaces

Configure a channelized E1 interface as an unpartitioned, clear channel:

Configuring an E1

Interface

[edit interfaces]

ce1-2/0/0 {

no-partition interface-type e1; # e1-2/0/0

}

The following configuration is sufficient to get the channelized E1 IQ or IQE interface up

and running:

Configuring Multiple

Interface Types

[edit]

interfaces {

ce1-1/2/3 {

partition 1 timeslots 10 interface-type ds; # ds-1/2/3:1

partition 2 timeslots 1-9 interface-type ds; # ds-1/2/3:2

}

ds-1/2/3:1 {

unit 0 {

family inet {

address 10.25.1.2/24;

}

ds-1/2/3:2 {

unit 0 {

family inet {

address 10.25.2.2/24;

}

Chapter 2: Channelized E1 Interfaces

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