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PA-POS-1OC3 Single-Port Port Adapter Installation and Configuration Guide
OL-6514-04
Chapter 4 Configuring the PA-POS-1OC3
Making a Back-to-Back Connection
Step 1 To connect two PA-POS-1OC3-equipped routers back to back, attach the appropriate cable between the
OC-3 interface port on each PA-POS-1OC3.
By default, the PA-POS-1OC3 uses loop timing mode.
Step 2 To specify that the PA-POS-1OC3 generates the transmit clock internally, add the clock source internal
command to your configuration (see the first router example above: clock source internal).
Note For back-to-back operation, at least one of the connected OC-3 interfaces must be configured to supply
its internal clock to the line.