Chapter21: Configuring Network Services
Avidia System Configuration and Management User Manual 417
4In the Cell Scrambling box, Enable or Disable cell scrambling.
Enables or disables cell scrambling. Cell scrambling, used in Avidia, is not an ATM
defined format for DS1, but is implement ed by many vendors. An ATM cell has two part s:
header and payload. Cell scrambling scrambles the payload so that it does not resemble the
header. In the event that an ATM network looses sync, it will attempt to synchronize on
what it sees as the cell header. In some cases, the cell payload can resemble the cell header,
so the network attempts to synchronize on the cell payload rather than the cell header.
Scrambling the cell payload precludes it from looking like a cell header. Choose to enable
or disable cell scrambling based on whether or not the ATM equipment in the network
supports cell scrambling.
5Use the Loopback box to initiate a communication path loopback for the port. See
“Initiating Communication Path Loopbacks” on page 563.
6To activate the new settings, click Set.
CONFIGURING DS1 SERVICE
This section contains instructions for configuring service for DS1 line cards installed in either
an Avidia 8000 or an Avidia 3000. To configure a DS1 line/management combination card
installed in an Avidia 2200, you must first subtend the Avidia 2200 to an Avidia 8000 or an
Avidia 3000 using the command-line interface (See “Subtending Multiple Systems” on page 45
and “Setting Up Connections” on page 70 for more information). Then, use in-band
management or the command-line interface to configure DS1 service on the DS1
line/management card.