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DMD50 Universal Satellite Modem
The Modem is equipped with eight permanently stored default maps, which are designated
ROM 1 through ROM 8. The user may also define, modify, and save an additional eight maps
which are designated USER 1 through USER 8.
ROM maps are read-only and may not be modified (refer to Table H-2).
IMPORTANT
#
1
2
3
4
5
1
1
1
1
1
1
2
1
2
1
2
1
3
1
2
3
4
1
4
1
2
3
4
5
5
1
2
3
4
5
6
1
2
3
4
5
7
1
2
3
4
5
8
1
2
3
4
5
Since the D&I Functions are separate and distinct, two separate maps must be configured at the
start of the D&I Multiplexer Operation. These are the Tx (transmit) Active Map for Drop
Mapping and the Rx (receive) Active Map for Insert Mapping. The number of entries in each map
is determined by the data rates selected. Each map entry consists of an IBS Time Slot assignment
and the Terrestrial (T1 or E1) Channel Number to which it is assigned. Drop Mapping and Insert
Mapping are completely separate and independent.
The map that is actually used for the Drop Function is the Tx Active Map; the map that is actually
used for the Insert function is the Rx Active Map. Two additional maps exist: the Tx Edit Map
and the Rx Edit Map. The Edit Maps are the buffer areas that are used when creating or
modifying a map through the modem's LCD; when editing is complete, copy the applicable map
to the Active Map.
Any map may be copied to any other map with the exception of the ROM maps. These maps may
only be the source of the data used to create a User, Edit, or Active Map.
Maps can be created in the map editor and stored as "User Maps". New "Active Maps" can be
downloaded during Modem Operation but this will result in a temporary disruption of service on
the terrestrial line or the Satellite transmission.
The following paragraphs give examples of typical configurations that could use the ROM Maps
as templates. The ROM Map used would have to be first copied to the appropriate Active
Transmit (Drop) and/or Active Receive (Insert) Map(s) before it could be used. To use a
modification of a ROM Map, the ROM Map must first be copied to the appropriate Edit Map,
then modified, and then copied to the appropriate Active Map.
MN-DMD50 Revision 4
Table H-2. D&I ROM Maps
T1/E1 Time Slot
6
7
8
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
1
1
1
1 1
1
1
1
2
1
2
1 2
1
2
1
2
3
4
1 2
3
4
1
6
1
2
3 4
5
6
1
6
7
8
1 2
3
4
5
6
7
8
9 10 11 12 1
6
7
8
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
6
7
8
9 10 11 12 13 14 15 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
1
1
1
1
1
1
1
1
2
1
2
1
2
1
2
1
2
3
4
1
2
3
4
1
2
3
4
5
6
1
2
3
6
7
8
1
2
3
4
5
2
3
4
5
6
7
8
9 10 11 12 1
Drop and Insert (D&I)
1
1
1
1
1
1
1
1
2
1
2
1
2
1
2
1
2
3
4
1
2
3
4
1
4
5
6
1
2
3
4
5
6
7
8
1
2
3
4
5
2
3
4
5
1
2
2
6
6
6
H–14
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