Cisco 7304 Mode D'Emploi
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Cisco 7304 6-Port Clear Channel E3 Line Card Installation and Configuration
OL-5061-01
Chapter 4 Configuring the 6E3 Line Card
Checking the Configuration
Figure 4-1
E3 Loopback Paths
Bit Error Rate Testing
The ratio of received bits on an interface that contain errors is called the bit error rate (BER). A bit error
rate test (BERT) is used to check the BER. E3 bit error rate testing is used on the Cisco 7304 router to
check communication between local and remote E3 ports. If traffic is not being transmitted or received
on an E3 port, or if the quality of the line simply needs to be tested, E3 bit error rate testing can be used
to test the port.
rate test (BERT) is used to check the BER. E3 bit error rate testing is used on the Cisco 7304 router to
check communication between local and remote E3 ports. If traffic is not being transmitted or received
on an E3 port, or if the quality of the line simply needs to be tested, E3 bit error rate testing can be used
to test the port.
For information on performing bit error rate testing, refer to the Configuration Tasks section of the T3
Maintenance Data Link Messages on the Cisco 7304 Router documenat the following URL:
Maintenance Data Link Messages on the Cisco 7304 Router documenat the following URL:
QJET
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No loopbacks
DTE loopback
Tx/Rx
HDLC
Diagnostic or local loopback
Line loopback
Payload loopback
LIU
Tx DS3 framer
Rx DS3 framer
QJET
Tx/Rx
HDLC
LIU
Tx DS3 framer
Rx DS3 framer
QJET
Tx/Rx
HDLC
LIU
Tx DS3 framer
Rx DS3 framer
QJET
Tx/Rx
HDLC
LIU
Tx DS3 framer
Rx DS3 framer
QJET
Tx/Rx
HDLC
LIU
Tx DS3 framer
Rx DS3 framer