Specifications

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PA-8T-V.35 Synchronous Serial Port Adapter Installation and Configuration
OL-3563-03
Chapter 5 Configuring the PA-8T-V.35 Interfaces
Checking the Configuration
Note You must configure a clock rate on the port before performing a loopback test. However, if no cable is
attached to the port, the port is administratively up, and the port is in loopback mode. You do not have
to configure a clock rate on the port before performing a loopback test.
Depending on the mode of the port, entering the loopback command checks the following path:
• When no interface cable is attached to the PA-8T-V.35 interface, or if a DCE cable is attached to a
port that is configured as line protocol up, the loopback command tests the path between the
network processing engine and the interface port only (without leaving the network processing
engine and port adapter).
• When a DTE cable is attached to the port, the loopback command tests the path between the network
processing engine and the near (network processing engine) side of the DSU or modem to test the
PA-8T-V.35 interface and interface cable.