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1991-12-30
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12.Proposed revisions to Recommendation M.1375
MAINTENANCE OF INTERNATIONAL DATA TRANSMISSION SYSTEMS
OPERATING IN THE RANGE 48 kbit/s TO 64 kbit/s
Replace the existing text of section 3.7 with the following:
"When an international satellite section includes a satellite link then
it may be possible to perform long RF loop measurements, including the up/down
link of the satellite, if such measurements are allowed by the satellite
transponder configurations, i.e, if the earth station can monitor its own transmission.
Such measurements, made in loop from the customer premises, the TIC or from the
earth station should be compared with similar loop measurements made when the
circuit functioned normally. Such measurements should be made before international
cooperation is sought to test the international section, but should not be
substituted for, or compared directly with, unidirectional measurements."
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