JDS Uniphase SmartClass E1, User Manual

Page: 45 / 144

Chapter 4 E1 Testing
Specifying test application settings
SmartClass E1 Tester User’s Guide 29
Specifying test application settings
Before transmitting traffic over a link, you can specify interfaces and settings
that filter received traffic for analysis.
Specifying a test mode
The SmartClass E1 can operate in the following test modes:
– Terminate Mode : This mode separates the Transmit and Receive side of
an E1 path. The received E1 signal is terminated and a completely inde-
pendent signal is transmitted.
Use this mode to test out of service lines using the RX1/TX1 port. You can
generate and send test patterns on TX1 and receive patterns on RX1.
RX2/Ext Clk is not used in this mode.
– Monitor Mode (PMP Monitor) : This mode measures signal parameters
and monitors traffic at an E1 access point (the PMP – Protected Monitor
Point). The PMP typically has a resistive loss of -26dB. The tester applies
gain to the input signal to compensate for the reduced PMP amplitude.
Both of the receivers are monitored simultaneously. However, the E1
tester does not transmit any traffic in this mode. This permits simultaneous
non-intrusive monitoring of the E1 line.
– Bridge Mode (HI-Z Monitor) : This mode allows you to bridge onto a
terminated E1 line with a high impedance (Hi-Z). This permits simulta-
neous non-intrusive monitoring on the E1 line. The transmitter on the E1
line is not used in this mode.
– Line Loopback : This mode loops the entire E1 circuit. This configuration
will loop the incoming data back out the transmitter yet still allow the
receiver to monitor the incoming signal.
Table 7 lists the transmitter/receiver used in the test modes supported by the
SmartClass E1 tester:
To specify a test mode
1 If you haven’t already done so, launch an E1 application (see “Launching
an E1 test application” on page 28 ).
2 On the Configuration menu, select Test Mode , and then use the up or
down arrow to specify one of the following:
– Terminate
– Monitor
– Bridge
– Line Loopback
Table 7 SmartClass E1 Tester Test Modes
Test Mode Rx1 Tx1 Rx2 Rx1 VF
Terminate X X X
Monitor X X X
Bridge X X X
Line Loopback X X X