Chapter 5 Managing Physical Ports
52 Avaya M770 ATM Switch User’s Guide
Specifying a cable length for a DS3 port
You can specify the coaxial (BNC) cable length for a DS3 port. The coaxial cable
length is up to these numbers in feet:
• 225: 0-225 feet, 0-68 meters.
• 450: 225-450 feet, 68-137 meters.
The default cable length is 225 (i.e. 0-225 feet).
Note: 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 the coaxial cable length for a DS3 port, use the pport set length
command.
Specifying a mapping mode for a DS3 port
You can specify for a DS3 port the mapping mode used for the transport of ATM
cells over DS3. The mapping mode is either ADM or PLCP. The default mapping
mode is ADM.
Note: 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 set the mapping mode for a DS3 port, use the pport set mapping command.
Command: M4-DS3s8:/>pport set length <<slot>.<port>> [225|450]
Example: M4-DS3s8:/>pport set length 8.1 225
Parameters: <pport id> The physical port identifier in the form <slot>.<portnumber>.
225 Sets the allowable coaxial cable length to:
0-225 feet, 0-68 meters.
450 Sets the allowable coaxial cable length to:
225-450 feet, 68-137 meters.
Command: M4-DS3s8:/>pport set mapping <<slot>.<port>> [adm | plcp]
Example: M4-DS3s8:/>pport set mapping 8.2 plcp
Parameters: <pport id> The physical port identifier in the form <slot>.<port.number>.
adm Sets the mapping mode to ADM. The default setting is ADM.
plcp Sets the mapping mode to PLCP.