33..00
C
CO
ON
NFFIIG
GU
UR
RA
ATTIIO
ON
N
The Model 2073 is equipped with two sets of eight DIP switches,
which allow configuration of the unit for a wide variety of applications.
This section describes switch locations and explains all possible con-
figurations.
3.1 CONFIGURING THE HARDWARE DIP SWITCHES
The 16 external switches are grouped into two eight-switch sets,
and are externally accessible from the underside of the Model 2073.
The two sets of DIP switches on the underside of the Model 2073
will be referred to as S1 and S2. As Figure 2 shows, the orientation of
all DIP switches is the same with respect to “ON” and “OFF” positions.
5
Figure 2. Close Up of Configuration Switches (all sets are identical in appearance)
Figure 1. Underside of Model 2073, Showing Location of DIP Switches
3.1.1 Configuration DIP Switch Set “S1”
Switches S1-1 thru S1-4: DTE Data Rates
The DTE synchronous and asynchronous data are determined by
the combined switch settings of S1-1,S1-2,S1-3, and S1-4. The follow-
ing table lists all the possible switch combinations and the correspon-
ding DTE data rates:
NOTE1: The four data rate configuraton switches are ignored when Octet
Timing Mode is selected (S2-1 is set to the “On” position, D8=1). In Octet
Timing Mode, the data rate defaults to 128kbps.
NOTE2: Asynchronous rates are 9600, 14,400, and 19,200. To run in asynchro-
nous mode, set the 2073 for 64K synchronous to over sample the data bits.
6
OFF
ON
Rear
Front
Data Rate
S1-1
S1-2
S1-3
S1-4
9600
Off
On
On
Off
14.4
Off
On
On
On
19.2
On
Off
Off
Off
28.8
On
Off
Off
On
32
On
Off
On
Off
38.4
On
Off
On
On
48
On
On
Off
Off
56
On
On
Off
On
57.6
On
On
On
Off
64
On
On
On
On
Position
Function
Factory Default
S1-1
DTE Data Rate
On
S1-2
DTE Data Rate
On
S1-3
DTE Data Rate
On
S1-4
DTE Data Rate
On
S1-5
Transmit Clock Source
On
S1-6
Transmit Clock Source
Off
S1-7
Reserved
Off
S1-8
V.54 Prep Phase Reception
On Enabled
S1 Summary Table
}
64kbps
Network (Normal)
}
