Agilent Technologies 622Vu Advisor, User Manual

Page: 168 / 244

Specify zero (0) if the cell is not the last cell of the PDU; 1 to include the end-of-
datagram signal. A zero value doesn’t affect the payload. If you specify 1:
•
622Vu Advisor reserves the last eight bytes of payload. Click the CPCS tab
to assign the value you want for each reserved field.
•
The PTI in the cell header changes to reflect end-of-datagram signalling.
You can override the PTI to change this setting, as necessary, but make sure
the last bit of the value you specify is a 1 so it correctly reflects end-of-
datagram signalling (1 and 3 are fine; 5 is out of range for AAL5).
Note: If you set End of Datagram ON (1) then turn it OFF (0), the positions that were formerly
reserved remain set in the payload, although they can now be modified.
CPCS Settings
The CPCS (Common Part Convergence Sublayer) mini-wizard is enabled when
you select end-of-datagram signalling using the SAR tab. Click the CPCS tab to
assign values to the positions reserved for end-of-datagram information. All
settings are in hexadecimal format.
9: Editing Transmit Sequences
9.4 Defining the Cells In a Sequence
168