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3. VT100 Interface
3-38
April 2003
8300-A2-GB20-00
AAL1 Format
Specifies AAL1 format
−
Basic, E1Cas, Ds1SfCas, or Ds1EsfCas. This value must
be set in accordance with the table on page 3-39 for proper operation.
Payload
Scrambling
The 8300 Endpoint scrambles/descrambles cell payload bytes at the physical
layer interface using an x
43
+ 1 polynomial. You may enable/disable the
scrambling function on the CES Service Details Screen. Normal operation will
have Payload Scrambling enabled. (See
Figure 3-34
.)
Partial Fill
Sets the number of user octets per cell. Setting this parameter to 0 disables Partial
Cell Fill, and all cells are completely filled before being sent.
Rx Cell Delay Var
Maximum cell arrival jitter in 10-
µ
s increments that the reassembly process will
tolerate in the cell stream without producing errors on the CBR service interface.
Default is 100 for a 1000-
µ
s Cell Delay Variation (CDV).
Cell Loss Int
Time in milliseconds for the cell loss integration period. If cells are continuously
lost during the specified period of time, Cell Loss Status is set to Loss. Default is
2500 ms.
Admin Status
Sets the Administrative Status of the CES IWF. Up indicates traffic flow is enabled,
and Down indicates traffic flow is disabled across the CES IWF.
NOTICE:
To enable a new parameter, rather than saving and restarting, set
the Administrative Status to Down, and click on the Submit button at
the bottom of the screen. Then set the Administrative Status to Up,
and click on the Submit button once again.
Operational Status
Displays the Operational Status of the CES IWF. The state will be Down or
Unknown if the supporting CBR or ATM interface is down or unknown.
Status
Reassembly Cells
Displays the number of cells received by the CES IWF. This number excludes cells
that have been discarded for any reason, including cells not used due to their
being misinserted or discarded while the reassembler was awaiting
synchronization.
Header Errors
Displays the number of AAL1 header errors detected, including those that have
been corrected. Header errors include correctable and uncorrectable CRCs and
bad parity.
Pointer Reframes
Displays the number of events in which the AAL1 reassembler found a Structured
Data Pointer (SDT pointer) where it was not expected, making it necessary to
reacquire the pointer.
Pointer Parity Errs
Displays the number of events in which the AAL1 reassembler has detected an
SDT pointer parity check failure.