CopperOptics 150-1253-01, Руководство пользователя

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150-512-100-03, Revision 03 Installation
HRU-512 List 1 September 25, 1998 27
Figure 13. HiGain-FT1 Loopback Configurations
When testing the fractional T1 circuit, the HRU DS1 data always
occupies time slot 1 through the number of time slots used.
Data at the HLU begins with the time slot assigned to the
physical channel unit position into which the HLU is installed.
If the HLU is installed in position 8B of the D4 bank and the
circuit is provisioned for four contiguous DS0 time slots of
bandwidth, the data is in HLU DS0 time slots 8, 9, 10 and 11 and
in HRU-512 List 1 DS0 time slots 1, 2, 3 and 4.
Loopbacks
toward
customer
Loopbacks
toward
channel
bank
HDSL SPAN
AIS*
AIS
and
ASC*
* AIS is only transmitted on the DS0 time slot bandwidth as provisioned by the user
HDSL SPAN
D4 Channel
bank
C
u
st
om
er i
n
te
rf
ace
6 in 7
5 in 7
LOGIC
LOGIC
NREM (NAIS-DIS)
NREM (NAIS-ENA)
HRU
HRU
METALLIC
HDSL SPAN HLU
NREM
HDSL SPAN
AIS
AIS
LOS
HDSL SPAN
CLOC
HLU
HLU
HLU
HLU
NLOC
Logic
HRU
HRU
HRU