ADC AVIDIA SWD4573I1 User Manual page 447

3 In the Circuit Identifier
4 In the LBO/Equalization
•
For a DS1 line, select the equalization (
• For a DSX1 line, select the line length (
266 to 399 feet
5 In the Line Code
6 In the Framing
SuperFrame DS1
7 In the Transmit Clock Source
8 Use the Loopback box to initiate a communication path loopback for the port. See
"Initiating Communication Path Loopbacks" on page
9 In the Cell Scrambling
Enables or disables cell scrambling. Cell scrambling, used in Avidia, is not an ATM
defined format for DS1, but is implemented by many vendors. An ATM cell has two parts:
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.
10 Do one of the following:
•
To activate the new settings, click
return to the
•
To cancel the new settings, click
clicked Set
Avidia System Configuration and Management User Manual
box, type a text string to identify the circuit.
box, do one of the following:
(121 m), 399 to 533 feet
box, select the type of coding on the line (
box, select the type of line connected to the selected port (
or
AT&T D4 format DS1
box, select the type of timing in use (
box, Enable or
DS1 Configuration window.
.
Chapter 21: Configuring Network Services
0 dB , -7.5 dB , -15 dB
0 to 133 feet (40 m),
(162 m), or 533 to 655 feet
).
563.
Disable cell scrambling.
Set , then in the confirmation dialog click
Get . You can only cancel the settings if you have not
, or -22.5 dB )
133 to 266 feet (81 m),
(200 m)).
B8ZS or AMI ).
Extended
loopTiming or localTiming ).
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