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Configuring Channelized T1 Interface Properties

To configure channelized T1 IQ interface properties, include the t1-options statement at the [edit interfaces interface-name] hierarchy level:



[edit interfaces interface-name]

t1-options {

byte-encoding (nx56 | nx64)

fcs (16 | 32);

framing (esf | sf);

idle-cycle-flag (flags | ones);
invert-data;
line-encoding (ami | b8zs);

loopback (local | payload | remote);

start-end-flag (filler | shared);
}

Note: If you configure the line-encoding statement with the ami option and the byte-encoding statement with the nx64 option, excessive zeros in the payload area may bring the interface down. To prevent this, configure the byte-encoding statement with the nx56 option or include the invert-data statement.

To specify options for each of the DS0 channels, include the ds0-options statement at the [edit interfaces interface-name] hierarchy level:



[edit interfaces interface-name]
ds0-options {

byte-encoding (nx56 | nx64);

fcs (16 | 32);

idle-cycle-flag (flags | ones);

loopback payload;

start-end-flag (filler | shared);
}

Only a subset of the T1 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 T1 and DS0 options, see Configuring T1 Interfaces.

Each T1 interface has 24 time slots (DS0s). 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 T1 interface.

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