Verilink WANsuite 6450, Справочное руководство

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W e b S e r v e r I n t e r f a c e 3-35
configure the Service Type to correspond with the desired CBR port framing
and channel rate in accordance with the table on page 3-36.
Timing Determines the CES services clocking mode, which maps to the transmit
clock source of the CBR interface and Serial interface (if configured for a
CES service). When “Adaptive” timing is selected, the receive AAL1 payload
buffer is monitored for predetermined threshold levels to control the
frequency of the interface clocks. When the buffer depth exceeds the
predetermined upper threshold, the interface clock frequency is increased to
cause the buffer to drain more quickly. If the buffer depth falls below the
predetermined lower buffer threshold, the interface clock frequency is
decreased to cause the buffer to drain less quickly. Both lower and upper
threshold levels are used in conjunction with Cell Delay Variation to provide
hysteresis around threshold levels.
Values: Synchronous, Adaptive
Default: Synchronous
AAL1 Format Specifies AAL1 format
−
Basic, E1Cas, Ds1SfCas, or Ds1EsfCas. This value
must be set in accordance with the table on page 3-36 for proper operation.
Payload Scrambling The WANsuite 6450 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 3.32 on page 3-34.)
Partial Cell Fill Byte
Count
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
Variation (10
µ
s)
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 Integration
(ms)
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.
Administrative 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.