Справочник Пользователя для Avaya M770

Chapter 5

Managing Physical Ports

50

Avaya M770 ATM Switch User’s Guide

You can configure payload scrambling on or off. The default setting on.
When payload scrambling is enabled, the transmitted data will be passed through a 
self-synchronizing scrambler with the polynomial x

+1. This provides security 

against false cell and frame delineation.

You must disable the physical port before you can change, clear or reset any 

physical port parameters. For more information about how to disable a physical 
port, see Disabling a Physical Port on page 49.

To configure payload scrambling for a physical port, use the

pport set 

payloadscrambling

 

command. 

You can specify that the framing mode used for a physical fiber optic port is either 
Sonet or SDH. The default setting is Sonet. For DS3 modules you can specify that the 
framing mode used for a DS3 physical port is either CBIT or M23. The default 
setting for DS3 ports is CBIT.

You must disable the physical port before you can change, clear or reset any 

physical port parameters. For more information about how to disable a physical 
port, see Disabling a Physical Port on page 49.

To specify framing for a physical fiber optic port, use the

pport set framing

 

command. 

Command:

M15-155s8:/>pport set payloadscrambling <pport> [on | off]

Example:

M15-155s8:/>pport set payloadscrambling 8.3 on

Parameters:

<pport id>

The physical port identifier in the form <slot>.<port number>.

[on | off]

To specify the whether payload scrambling is on or off.

Command:

M15-155s8:/>pport set framing <pport> [sonet | SDH]

Example:

M15-155s8:/>pport set framing 8.1 SDH

Parameters:

<pport id>

The physical port identifier in the form <slot>.<port number>.

Sonet

Sets the framing mode for the physical port to Sonet. The 
default setting is Sonet.

SDH

Sets the framing mode for the physical port to SDH.