Specifications

4-16
PA-T3+ Serial Port Adapter Installation and Configuration
OL-3505-03
Chapter 4 Configuring the PA-T3+
Checking the Configuration
Enabling T3+ Scrambling
In interface configuration mode, enable T3+ scrambling by entering the scramble configuration
subcommand, as in the following example:
router(config-if)# scramble
Use the no form of this command to restore the default value, disabled.
Note The local port configuration must match the remote port configuration. For example, if you enable
scrambling on the local port, you must do the same on the remote port.
Also see the “Interoperability Guidelines for PA-T3+ DSUs” section on page 1-3 for information
regarding DSU feature compatibilities.
Specifying T3+ Framing
In interface configuration mode, specify T3+ framing by entering the framing {c-bit | m13 | bypass}
configuration subcommand, as in the following example:
router(config-if)# framing c-bit
Use the no form of this command to return to the default, C-bit framing.
Note If you use the bypass option, scrambling must be set to the default, disabled; the DSU mode must be set
to the default, 0; and the DSU bandwidth must be set to the default, 44210.
Setting the Cable Length
In interface configuration mode, set the cable length (0 to 450 feet), as in the following example:
router(config-if)# cablelength 250
Use the no form of this command to return to the default, which is 10 feet.
Checking the Configuration
After configuring the new interface, use the show commands to display the status of the new interface
or all interfaces, and use the ping and loopback commands to check connectivity. This section includes
the following subsections:
• Using show Commands to Verify the New Interface Status, page 4-17
• Using the ping Command to Verify Network Connectivity, page 4-24
• Using loopback Commands, page 4-25