Atec Agilent-J2300E - Manual (Page 10)

10
ATM Layer
Up to 1024 virtual channels are auto-detected on all ATM interfaces up to 155
Mb/s, except J2. For each auto-discovered virtual channel, the following
statistics are collected:
•Maximum and instantaneous utilization (%)
• Total cells and octets (count)
• Maximum, instantateous and average throughput (kb/s)
• Header (“HEC”) errors (count)
• CLP status (0 or 1)
At the 622 Mb/s ATM interface, up to 4096 VCs are auto-discovered.
Data within the ATM layer is captured in a cell-based buffer. Capture of ATM
cells occurs at full line speed up to 622 Mb/s into a data buffer. Each cell is
stamped with a 100 ns resolution time stamp and at rates up to 155Mb/s. The
display is user customizable - absolute, relative to a specific event, or ‘delta,’
representing the time change from one cell to the next, and a field indicating
whether the HEC was erroneous.
Display filtering of cells can be based on any of the header fields and also on
many common types of embedded protocols. OAM cells can be monitored
exclusively or with other data traffic for detailed analysis. Selective capture
can be done using pre-written quick test scripts or user-defined capture filters.