Owner`s manual

53
Appendixes
LOCAL AREA DATA SET APPLICATION
Your MultiDSU64K can be used as a point-to-point LADS (Local
Area Data Set) at transmission speeds of 2400, 4800, 9600, 19200,
56000 or 64000 bps over 4-wire, non-loaded metallic wire pairs. The
installation of the MultiDSU64K in a LADS application is the same
as for DDS applications, except for the timing (Clocking) setting.
LADS applications require one MultiDSU64K to be set for Internal
timing and the other MultiDSU64K to be set for DDS timing (refer to
Chapter 2 of this manual). The network cable connection requires
“cross-over” wiring; the transmit pair of each MultiDSU64K must be
connected to the receive pair of the far-end MultiDSU64K.
The MultiDSU64K uses 4-wire non-loaded metallic circuits for LADS
applications. The table below outlines approximations for the
maximum cable length for limited distance applications.
Data Rate Wire Gage
19 AWG 22 AWG 24 AWG 26 AWG
56000 bps 10.0 6.0 4.2 3.0 miles
64000 bps 7.8 4.7 3.3 2.3 miles
The figure below depicts a typical Local Area Data Set application.
Figure B-3. Local Area Data Set Application