7
8
S1-5 and S1-6: Clock Source
Switches S1-5 and S1-6 are set in combination to determine the
transmit clock source for the Model 1065RC.
S1-5
S1-6
Setting
On
On
Internal transmit clock
Off
On
Receive recover clock
On
Off
External transmit clock
S1-7: Asynchronous/Synchronous Mode
The setting for switch S1-7 determines whether the Model 1065RC
is in asynchronous or synchronous operating mode.
S1-7
Setting
On
Asynchronous
Off
Synchronous
S1-8: Carrier Control Method
The setting for switch S1-8 determines whether the carrier is “con-
stantly on” or “controlled by RTS”. This setting allows for operation in
switched carrier, multipoint and/or hardware handshaking applications.
S1-8
Setting
Off
Constantly on
On
Controlled by RTS
3.3 CONFIGURATION SWITCH SET “S2”
The DIP switches on S2 set word length, extended signaling rate,
RTS/CTS delay, V.52 & V.54 diagnostic tests and 2- and 4-wire opera-
tion. The default settings for S2 are shown in Figure 6 below.
Switches S2-1 and S2-2: Word Length
Switches S2-1 and S2-2 are set in combination to determine the
word length for asynchronous data, including start and stop pulses.
S2-1
S2-2
Setting
Off
On
8 bits
On
On
9 bits
Off
Off
10 bits
On
Off
11 bits
14.4 kbps
OFF
OFF
OFF
ON
19.2 kbps
ON
ON
ON
OFF
28.8 kbps
OFF
ON
ON
OFF
38.4 kbps
ON
ON
OFF
OFF
57.6 kbps
OFF
ON
OFF
OFF
OFF
16.0 kbps
OFF
ON
OFF
ON
ON
OFF
OFF
32.0 kbps
OFF
OFF
OFF
ON
ON
OFF
OFF
64.0 kbps
OFF
ON
ON
OFF
ON
DATA RATE SETTINGS S1-1 THROUGH S1-4 & S3-3
(continued)
SETTINGS
S1-1
S1-2
S1-3
S1-4
S3-3
Figure 5.1: Data Rate Settings S1-1 Through S1-4 & S3-3 (continued)
S2 SUMMARY TABLE
Position
Function
Factory Default
S2-1
Word Length
Off
S2-2
Word Length
Off
S2-3
Extended Signaling Rate
Off -2.5% to 1%
S2-4
RTS/CTS Delay
On
S2-5
RTS/CTS Delay
On
S2-6
2-Wire/4-Wire
On (4-Wire) FDX
S2-7
2-Wire/4-Wire
Off (4-Wire) FDX
S2-8
V.52/V.54
Off V.54 Enabled
}
}
7 ms
10 bits
Figure 6: Configuration Summary of S2 Switch Settings
