JDS Uniphase HST-3000 Product Manual page 2

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Figure 1 Datacom Configuration Menu
Figure 2 Datacom LED Results Page
Figure 3 G.821 Performance Results Page
HST-3000 OPTION FOR DATACOM TESTING
DTE/DCE Emulation
The HST-3000 Datacom SIM can replace either a DTE or DCE device and can test
head-to-head with existing network elements. By emulating the customer
premises equipment (CPE), the technician can control handshaking states
between DTE and DCE devices to ensure proper transitions and to verify
connectivity. Technicians can also sectionalize problems in the network by
qualifying proper data transmissions and signaling states.
Bidirectional Monitoring
The HST-3000 can passively monitor the transmission of the Datacom link in
both directions to confirm physical layer results.
Traffic Generation
With the HST-3000, users can send BERT patterns to verify error-free
performance by transmitting ANSI, ITU, and user-programmable test patterns.
Test head-to-head with other JDSU equipment or via loopback. Performance
measurements such as round-trip delay and G.821 results allow users to verify
that all circuit parameters fall within the required level of performance.
Frame Relay over Datacom
With the Frame Relay software option, technicians can verify that frame relay
service is functioning properly by testing Layer Management Interface (LMI)
activity, Permanent Virtual Circuit/Data Link Connection Identifier (PVC/DLCI)
status, congestion, lost frames, and committed information rates (CIR).
Timing Analysis
When using synchronous timing, the receiving device must be properly sync-
hronized to the clock signal, or misinterpretation of bits can cause bit errors and
timing slips. The HST-3000 provides internal and interface clock source options,
allowing technicians to rapidly diagnose and correct network timing problems.
Verify End-to End Connectivity
Technicians can quickly isolate any problem to a specific direction by
analyzing the performance of the entire digital link in both directions. After the
circuit is installed, the HST-3000 can be used to qualify proper channel routing,
delay, and performance over the entire link.
Self-Loop Testing
The HST-3000 provides an internal self-loop testing feature that connects the
transmitter to the receiver without involving amplifiers or cables. This feature
allows technicians to validate the unit settings and the selected test interface on
the HST-3000. An external cable verifies the amplifiers as well as the current
emulation cable.
User-Configurable Setup
Technicians can select and configure the test interface, timing mode, timing
source, data rate, flow control, and test pattern on the HST-3000. In addition
to standard software LED result pages, the HST-3000 contains user-defined
hardware Datacom LEDs on the module that displays signal states and
mark/space.