Specifications

4-5
PA-8T-V.35 Synchronous Serial Port Adapter Installation and Configuration
OL-3563-03
Chapter 4 Attaching the PA-8T-V.35 Interface Cables
Determining the Port Mode
Router(config-if)# no shutdown
Ctrl-Z
Router#
Router# copy running-config startup-config
These steps prompt the system to poll the interface and recognize the new interface immediately.
When you configure a port for a DCE interface for the first time, or when you set up a loopback test, you
must set the clock rate for the port. When you connect a DCE cable to a port, the interface remains down
and does not function until you set a clock rate (regardless of the DCE mode default).
If you are changing the mode of the interface from DCE to DTE, you do not need to change the clock
rate for the port. After you replace the DCE cable with a DTE cable, and the system recognizes the
interface as a DTE, it uses the external clock signal from the remote DCE device and ignores the internal
clock signal that the DCE interface normally uses. Therefore, when you configure the clock rate on a
port for either a DCE interface or loopback, you can leave the clock rate configured and still use that port
as a DTE interface.
This completes the procedure for replacing a PA-8T-V.35 compact serial cable on the PA-8T-V.35.
Proceed to Chapter 5, “Configuring the PA-8T-V.35 Interfaces.”