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Installation 42
Model 3088 Series User Manual 3 • RocketLink-G installation
Installation
Once the Model 3088 is properly configured, it is ready to connect to the twisted pair interface, to the serial
port, and to the power source. This section tells you how to make these connections.
Connecting the twisted pair interface
The Model 3088 supports communication between two DTE devices as follows:
Using 24 AWG (0.5 mm) wire up to:
• 32,000 feet (9.7 km) at 192 kbps
• 18,500 feet (5.6 km) at 2.312 Mbps
Using 26 AWG (0.4 mm) wire up to:
• 23,000 feet (7 km) at 192 kbps
• 13,200 feet (4 km) at 2.312 Mbps
Two things are essential:
1. These units work in pairs. Both units at the end of the twisted pair DSL span must be set for the same
DTE rate—one unit set as CO, the other as CP.
2. To function properly, the Model 3088 needs one twisted pair of metallic wire. This twisted pair must be
unconditioned, dry, metallic wire, between 19 (0.9mm) and 26 AWG (0.4mm) (the higher number
gauges will limit distance). Standard dial-up telephone circuits, or leased circuits that run through signal
equalization equipment, or standard, flat modular telephone type cable, are not acceptable.
The RJ-45 connector on the Model 3088’s twisted pair interface is polarity insensitive and is wired for a two-
wire interface. The signal/pin relationships are shown in figure 7.
\
Figure 7. Model 3088 V.35/X.21 interfaces
The interconnecting cables shall be acceptable for external use
and shall be rated for the proper application with respect to volt-
age, current, anticipated temperature, flammability, and
mechanical serviceability.
CAUTION
3088/D (X.21, female DB-15)
3088/CA (V.35, female DB-25)