Telindus 1031, User And Reference Manual

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Telindus 1031 Router Chapter 10
Reference manual Configuration attributes
198
telindus1031/g703[ ]/channel[ ]/atm/atmConfig
Use this attribute to configure the general ATM parameters.
The
atmConfig
structure contains the following elements:
Element Description
idleCellFormat Use this element to set the format of the ATM idle
cells. These cells are transmitted when no data is
transmitted over the line. I.e. the line is idle.
The
idleCellFormat
element has the following values:
Some devices use the ITU-T format, others the ATM forum format. Should the per-
formance attribute
telindus1031/g703[ ]/channel[ ]/atm/unknownCells
increase rapidly, then
try selecting a different format. However, the default value suffices in most cases.
scrambling
Use this element to enable or disable scrambling.
Scrambling is designed to randomise the pattern of 1s
and 0s carried in ATM cells or the physical layer frame. Randomising the digital
bits can prevent continuous, non-variable bit patterns, in other words long strings
of all 1s or all 0s. Several physical layer protocols rely on transitions between 1s
and 0s to maintain clocking.
coset Use this element to enable or disable coset.
Coset is an ATM parameter which indicates when to
calculate the header error correction bit if it is to be “OR”ed with another value or
not (known as the COSET Polynomial).
Default:-
Range: structure, see below
Default:itu
Range: enumerated, see below
Value Description
itu Sets the cells according to the ITU-T format. In this case
they are effectively called “idle cells”.
atmForum Sets the cells according to the ATM forum format. In this
case they are actually called “unassigned cells”.
Default:enabled
Range: enabled / disabled
Default:enabled
Range: enabled / disabled