11
LIMITED-DISTANCE MODEM 56/64
2. Introduction
2.1 Description
The Limited-Distance Modem is used for local data
distribution, connecting full-duplex sync or async DTEs,
computers, or controllers over unconditioned 4-wire
dedicated lines. The Modem operates at data rates of 56
or 64 kbps, at distances of up to 6 miles (10 km),
according to the wire gauge and data rate (see
Table 2-1
).
Table 2-1. Approximate Range.
Data Rate 19 AWG
24 AWG
26 AWG
(0.9 mm)
(0.5 mm)
(0.4 mm)
kbps
km
miles
km
miles
km
miles
56/64
10
6
4.5
2.8
3.2 2
Six models are available in both 115-VAC and
220-VAC versions:
• Limited-Distance Modem 56/64, V.35, RJ-45
female, M/34 female (ME560A-V35-F)
• Limited-Distance Modem 56/64 V.35, RJ-45
female, M/34 male (ME560A-V35-M)
