Chapter 4 E1 Testing
Monitoring a circuit
38 SmartClass E1 Tester User’s Guide
3 If you need to specify other settings for the test, press Cancel to return to
the Configuration menu.
The VF settings are configured.
Monitoring a circuit
The SmartClass E1 allows you to monitor both E1 receivers simultaneously.
You can analyze full E1 and n x 64k circuits and examine transmission layer
results, such as CRC and frame errors, or code errors for a single side of the
traffic or in both directions.
The following procedure describes how to monitor a circuit.
To monitor a circuit
1 Launch the BERT application. See “Launching an E1 test application” on
page 28.
2 Connect the E1 Tester to the test access point:
– Connect the 2M Reference Clock cable from the SmartClass E1 RX2/
Ext Clk jack to an E1 BITS clock or a known good reference signal.
– Connect a cable from the SmartClass E1 RX1/TX1 jack to the signal to
be tested.
3 To set the test configuration, do one of the following:
– On the test menu, select Action, and then select Auto Configure.
The unit will attempt to automatically configure the interface, framing,
and pattern. Go to step 9.
– On the test menu, select Configuration, and then proceed with step 4.
4 On the Configuration menu, select Test Mode.
A list of test modes appears.
5 Select Monitor.
6 Configure the interface settings. See “Specifying interface settings” on
page 30.
7 Configure the Framing settings. If you selected the n x 64k payload, you
can select specific timeslots to monitor. See “Specifying E1 framing
settings” on page 31.
8 Specify a BERT pattern. See “Specifying a BERT pattern” on page 33.
9 To monitor VF channel, configure the VF settings. See “Specifying VF
settings” on page 37.
10 To configure settings for ITU performance analysis, configure the perfor-
mance settings. See “Specifying performance settings” on page 36.
NOTE:
The transmitter (Tx) is turned off in Monitor mode.
NOTE:
If you select the All Zeros BERT pattern, the line coding should be set to
HDB3. Using AMI is not recommended because the network will lose timing
and signal. To change the line coding see “Line Coding” on page 30.
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