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When the Model 1088 has been properly configured, it may be
connected to the DSL twisted pair interface, the 10BaseT Ethernet
Interface, and the power source. This section describes these connec-
tions.
5.1 CONNECTING DSL INTERFACE
The Model 1088 supports communication between 10BaseT Hubs
or Workstations at distances to 5 miles (8 km) over 24 AWG (.5mm)
twisted pair wire. There are two requirements for installing the Model
1088:
1. These units operate as a
pair
. Both units at the end of the
twisted pair DSL span must be set for the same DTE rate.
2. To function properly, the Model 1088 needs one
twisted
pair of metallic wire. This twisted pair must be
unconditioned
, dry, metallic wire, between 19 (.9mm) and 26
AWG (.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 modu-
lar telephone type cable, are
not acceptable
.
The RJ-45 connector on the Model 1088’s twisted pair interface is
polarity insensitive and is wired for a two-wire interface. The signal/pin
relationships are shown in Figure 6 below.
5.2 CONNECTING 10BASE-T ETHERNET PORT TO PC (DTE)
The 10Base-T interface is configured as DTE (Data Terminal
Equipment). If the Model 1088 is to to connect to another DTE device
such as a 10Base-T network interface card, construct a 10Base-T
crossover cable and connect the wires as shown in the diagram below.
10BaseT Port
10Base-T DTE
RJ-45 Pin No.
RJ-45 Pin No.
1 (TD+)
1 (TD+)
2 (TD-)
2 (TD-)
3 (RD+)
3 (RD+)
6 (RD-)
6 (RD-)
5.3 CONNECTING 10BASE-T ETHERNET PORT TO HUB (DCE)
The 10Base-T interface is configured as DTE (Data Terminal
Equipment), just like a 10Base-T network interface card in a PC.
Therefore, it “expects” to connect to a 10Base-T Hub using a straight-
through RJ-45 cable. Use the diagram below to construct a cable to
connect the 10 BaseT interface to a 10Base-T Hub.
10BaseT Port
10Base-T Hub
RJ-45 Pin No.
RJ-45 Pin No.
1 (TD+)
1 (RD+)
2 (TD-)
2 (RD-)
3 (RD+)
3 (TD+)
6 (RD-)
6 (TD-)
14
Figure 6.
Model 1088 twisted pair line interface.
1 (N/C)
2 (N/C)
3 (N/C)
4 (2-Wire TIP)
5 (2-Wire RING)
6 (N/C)
7 (N/C)
8 (N/C)
1
2
3
4
5
6
7
8
DSL
Interface
10BaseT
Interface
1 TD+ (data output from 1088)
2 TD- (data output from 1088)
3 RD+ (data input to 1088)
4 (no connection)
5 (no connection)
6 RD- (data input to 1088)
7 (no connection)
8 (no connection)
1
2
3
4
5
6
7
8
Figure 7.
Model 1088 10BaseT Ethernet RJ-45 Connector Pinout
