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channel group
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Combination of DS0 or ISDN PRI B-channels interfaces partitioned
from a channelized interface into a single logical bundle.
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channelized E1
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2.048-Mbps interface that can be configured as a single clear-channel
E1 interface or channelized into as many as 31 discrete DS0 interfaces,
or up to 30 ISDN PRI B-channels and 1 D-channel. On J-series
channelized T1/E1/ISDN PRI interfaces, time slots are numbered from
1 through 31, and time slot 1 is reserved for framing. When the interface
is configured for ISDN PRI service, time slot 16 is reserved
for the D-channel.
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channelized interface
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Interface that is a subdivision of a larger interface, minimizing
the number of Physical Interface Modules (PIMs) that an installation
requires. On a channelized PIM, each port can be configured as a single
T1 or E1 clear channel or partitioned into multiple discrete DS0 interfaces
or ISDN PRI channels.
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channelized T1
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1.544-Mbps interface that can be configured as a single clear-channel
T1 interface or channelized into as many as 24 discrete DS0 interfaces,
or up to 23 ISDN PRI B-channels and 1 D-channel. When the
interface is configured for ISDN PRI service, time slot 24 is
reserved for the D-channel.
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E1 interface
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Physical WAN interface for transmitting signals in European
digital transmission (E1) format. The E1 signal format transmits information
at a rate of 2.048 Mbps and can carry 32 channels of 64 Kbps
each.
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Primary Rate Interface (PRI)
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ISDN service intended for higher-bandwidth applications than
ISDN BRI. ISDN PRI consists of a single D-channel for control and
signaling, plus a number of 64-Kbps B-channels—either 23 B-channels
on a T1 line or 30 B-channels on an E1 line—to carry network
traffic.
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T1 interface
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Physical WAN interface for transmitting digital signals in the
T-carrier system used in the United States, Japan, and Canada. The
T1 signal format carries 24 pulse code modulation (PCM) signals using
time-division multiplexing (TDM) at an overall rate of 1.544 Mbps.
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