Table of Contents
Advertisement
MTT-14B e_Manual D07-00-083P RevA00
3 Applications
3.1 Loop Prequalification
Central Office
2 or 4 Wire G.SHDSL
STU
STU-C
Figure 44 Dual-ended Modem Emulation
Use this dual-ended test during the prequalification phase, be-
fore the DSLAM is setup and running in a particular location. It
is also used by contract groups who need to prequalify circuits,
but do not have direct access to the DSLAM. The application
for this mode is:
• STU-C and STU-R modem emulation; link turn-up utilizing
proper G.SHDSL line coding in 2 or 4 wire mode.
3.2 STU-R Emulation-ISP Service
B-RAS
ATM
Internet
Router
Figure 45 STU-R Emulation
Use STU-R modem emulation during installation and service
verification procedures. Connect the test set to the cable pair,
using the STU port on the module and turn up the link with the
CO. This verifies the link can be established, the bit rate can be
supported, and no errors occur. Applications in this mode are:
• Achieve synchronization with DSLAM.
• Link measurements like rate, noise margin, and attenuation.
• PING to ISP.
Customer Premises
STU
STU-R
STU
2 or 4-wire
DSLAM
G.SHDSL
STU-R
Page 70 of 101
Advertisement
Table of Contents
