Verifying a Network Installation

Verification of the network installation is encompassed in three phases:
 Bit error rate tests and validation diagnostics
 Connection of customer premise equipment
 Configuration
The telephone company installer usually performs bit error rate tests and other validation
diagnostics, the first component of verification. The second phase of verification typically
requires connecting the customer premise equipment—the router or DSU. After the equipment
is connected, the installer can use the LED information to provide a high-level overview of the
usability of the link. The third phase of verification uses an actual configuration. For example,
the installer or network architect might configure one of the PVCs to carry an upper layer protocol
for simple connectivity tests. For the purposes of the exam, Cisco is primarily interested
in the use of the LED indicators.