Configure
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Alcatel-Lucent
Beta
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OmniAccess 5740 Unified Services Gateway Web GUI Users Guide
Step 3:
Select the framing, line code, and clock source from the
Framing, Line
Code,
and
Clock Source
drop down lists.
•
Framing
: Select the framing option:
esf/sf
to determine which framing type is
required for the T1 circuit.
Framing is configured where the router or access server is intended to
communicate with t1 fractional data lines.
i.
esf
(Extended Super Frame) - Type of frame format used. Also known as D5
or Fe. Each extended superframe consists of 24 frames.
ii.
sf
(Super Frame): Type of frame format used. A Superframe is a structure
constructed of 12 Frames, numbered: 1 - 12. It is also called as the D4 frame.
•
Line Code
: Select the line option:
ami/b8zs
to set the line code for T1.
Line Code is configured where the router or access server is intended to
communicate with T1 fractional data lines.
i.
ami
: Alternate Mark Inversion (AMI) line-code type.
AMI is a line encoding technique (line code) for T1s. This three-level
system uses positive, negative, and grounded pulses (e.g. -5V, 0V, 5V) to
represent logical values. A logical 0 is represented with a grounded or
absent pulse, and a logical 1 by pulses of alternating polarity.
ii.
b8zs
: Binary 8 Zeros Substitution (b8zs) line code type.
b8zs is an encoding method in T1 and E1 transmission that substitutes a
special bit pattern for 8 consecutive zeros in order to maintain ones
density.
•
Clock Source
: Select the clock source option:
Internal/Line
to set the clock
source for T1. Clock source is used to transmit clock signals.
The default value for
clock source is internal.
i.
Internal
: The controller synchronizes itself to the internal (system) clock.
ii.
Line
: The controller recovers external clock from the line and provides the
recovered clock to the internal (system) clock generator.
