Schmid Watson Installation Guide Page 90

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SZ-DOC-W5-1.pdf LTU/NTU
Version: 1.5 Operating Manual
81 Revision: 2002-09-10
8.2.2 Assignment of E1 Time Slots to the DSL Loops
When the E1 and DSL interfaces have been set up, the time slots can be ‘switched’ from the E1
to the DSL interfaces. Each time slot of an E1 interface must be mapped to a DSL loop.
Example: The command
LTU_01_CM> MP 1 AAAAAAAAAAAAAAAABBBBBBBBBBBBBBBB
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Multipoint Configuration
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
TS 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
Nr 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
1 a a a a a a a a a a a a a a a a b b b b b b b b b b b b b b b b
2 --------------------------------
A --------------------------------
B --------------------------------
C --------------------------------
D --------------------------------
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
LTU_01_CM>
assigns time slots 0 to 15 (from E1 interface 1) to loop A and time slots 16 to 31 to loop B. The
first parameter of the MP command is the interface to be configured, ‘1’ selects E1 interface 1,
‘2’ selects the 2
nd
E1 interface. The second parameter is a string of up to 32 characters. The first
character determines the target for the first time slot (TS0), the subsequent characters are
assigned to subsequent time slots. The current multipoint configuration will be displayed. The
first two lines number the time slots of the interfaces from 00 to 31. The lines named ‘1’ and ‘2’
contain the configuration of E1 interfaces 1 and 2, the lines ‘A’, ‘B’, ‘C’ and ‘D’ display time slots
used on the DSL loops A to D.
The characters used for the E1 interface are:
A…D: assign time slot to DSL loop,
0: time slot is not used (for unused time slots, all ones are received),
L: time slot is looped back
If the second parameter contains less than 32 characters, the remaining time slots are unused.
To switch off all time slots of the 1
st
E1 interface, “MP 1 OFF” (or “MP 1 0”) can be used. The use
of the character ‘L’ to loop back time slots is explained in the section “Cascading Multipoint
LTUs”.
8.2.3 DSL Time Slot Selection
Once the E1 time slots are assigned to the different DSL loops, it has to be selected which DSL
time slots carry the E1 data. The DSL time slots are numbered from 0 to 31. The numbers define
the E1 time slot which is carried in that DSL time slot when using standard time slot mapping
according to ETSI TS 300 311, i.e. if you have an E1 modem at the remote end, DSL time slotn
will be mapped to E1 time slot n.
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