CHAPTER 5
Configuring E1 and T1 Interfaces
•
Configuring E1 BERT Properties on page 165
•
Configuring E1 Loopback Capability on page 167
•
Configuring T1 BERT Properties on page 168
•
Configuring T1 Loopback Capability on page 170
Configuring E1 BERT Properties
This topic discusses BERT properties for the E1 interface specifically. For general
information about the Junos OS implementation of the BERT procedure, see Configuring
Interface Diagnostics Tools to Test the Physical Layer Connections.
You can configure an E1 interface or a CE1 or E1 partition on a channelized PIC to execute
a bit error rate test (BERT) when the interface receives a request to run this test. You
specify the duration of the test and the error rate to include in the bit stream by including
the bert-period and bert-error-rate statements at the [edit interfaces interface-name
e1-options] hierarchy level:
[edit interfaces interface-name e1-options]
bert-error-rate rate;
bert-period seconds;
By default, the BERT period is 10 seconds. You can configure the BERT period to last
from 1 through 239 seconds on some PICs and from 1 through 240 seconds on other PICs.
Standard CE1, standard E1, E1 IQ, and E1 IQE interfaces, and PICs partitioned to CE1 and
E1 channels, support an extended BERT period range, up to 86,400 seconds (24 hours),
and have a default BERT period value of 240 seconds.
NOTE: When configuring E1 and CE1 interfaces on 10-port Channelized E1/T1
IQE PICs, you must include the bert-period statement at the [edit interfaces
ce1-fpc/pic/port] hierarchy level.
NOTE: When configuring CE1 interfaces on the 16-port Channelized E1/T1
Circuit Emulation MIC (MIC-3D-16CHE1-T1-CE), you must include BERT
configuration options at the [edit interfaces ce1-fpc/pic/port] hierarchy level.
165Copyright © 2017, Juniper Networks, Inc.
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