About Pra Interfaces And The Hst Emulation Modes; U2 Interface; Te-U2/G.704 Simulation Mode; U2/G.704 Simulation Mode - JDS Uniphase HST-3000 User Manual

About PRA interfaces and the HST emulation modes

U interface
2
TE-U /G.704
2
simulation mode
LT-U /G.704
2
simulation mode
U /G.704 Monitor The tester is used to monitor a TE on the U
2
The HST ISDN PRA option offers seven emulation modes for
testing the U and S
2
HST to emulate a specific network device or devices when
testing ISDN PRA service.
faces.
S /T
2 2
TE
Figure 11 PRA interfaces
For details on testing ISDN PRA service using the HST, refer
to "About ISDN PRA testing" on page
The U interface is the physical 4-wire interface spanning from
2
the central office, to the local loop, and finally, to the customer
premises. Each of the modes available for testing the U
face are described below.
The tester replaces the terminal equipment (TE) and operates
on a U /G.704 interface. In this case, the tester can operate
2
with a max. attenuation of 33dB.
The tester is used to replace the Line Termination (LT) device,
and emulates the switch. In this case, the tester can operate
with a max. attenuation of 33dB.
HST-3000 E1 Testing User's Guide
About PRA interfaces and the HST emulation modes
/T interfaces. Each mode allows the
2 2
Figure 11
U
2
NT
Chapter 3 ISDN PRA testing
illustrates the PRA inter-
Central Office/Switch
V3
LT
44.
/G.704 interface.
2
inter-
2
47