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COMSPHERE 3550 Series Data Service Units
2-8 March 1999 3550-A2-GB20-30
Table 2-2
LADS Connection Distances
Data Rate
Wire Gauge (AWG)
Data
Rate
(kbps)
19 22 24 26
2.4 20.0 mi
(32.2 km)
16.6 mi
(26.7 km)
12.7 mi
(20.5 km)
9.4 mi
(15.1 km)
4.8 19.4 mi
(31.2 km)
12.7 mi
(20.5 km)
9.6 mi
(15.4 km)
7.1 mi
(11.5 km)
9.6 15.2 mi
(24.5 km)
9.7 mi
(15.6 km)
7.3 mi
(11.7 km)
5.6 mi
(9.0 km)
19.2
1
11.8 mi
(19.0 km)
7.5 mi
(12.1 km)
5.7 mi
(9.2 km)
4.2 mi
(6.8 km)
38.4 11.2 mi
(18.0 km)
6.5 mi
(10.5 km)
4.6 mi
(7.4 km)
3.2 mi
(5.1 km)
56 9.2 mi
(14.8 km)
5.4 mi
(8.7 km)
3.8 mi
6.2 km)
2.8 mi
(4.5 km)
64 9.2 mi
(14.8 km)
5.4 mi
(8.7 km)
3.8 mi
(6.2 km)
2.8 mi
4.5 km)
1
Power level is –10 dBm.
Addressing the Unit
A unique address must be assigned to each control and
tributary DSU in your network. You can assign an address
within the range of 1 through 255.
NOTE
Do not assign the number 192
as a network address. This
number is reserved as a
broadcast address.
If a DBM is installed, it requires a separate address
which is automatically assigned by the DSU. The address
assigned a DBM is the DSU’s address, plus 1 (e.g., if the
DSU’s address is 1, the assigned DBM address will be 2).
NOTE
The numbers 191 and 255
cannot be assigned to a DSU
that has a DBM. However,
addresses can be assigned in
any order; they do not have to be
sequential.
It is recommended that only
odd-numbered
addresses be
assigned to DSUs so that
even-numbered addresses
are
reserved for DBMs
.
If your
network does not currently
include DBMs, you retain the
flexibility to add them later
without having to reconfigure
your entire network.