Patton electronic 2500 Series - Manual (Page 10)

Character Length
Choosing option 4 in the Software Switch Menu takes you to the
Character Length Menu (below). In asynchronous data format, the
Model 2500 Series supports 10-bit and 11-bit character lengths. Set
this option according to the characteristics of the data being
transmitted.
DTE Data Format
Choosing option 5 in the Software Switch Menu takes you to the
Data Format Menu (below). This option controls whether an async-to-
sync conversion is performed between the DTE and the Model 2500
Series. (Data is always transferred synchronously between two Model
2500 Series units.) For an asynchronous DTE, select the
asynchronous data format
1,2 ; for a synchronous DTE, select the
synchronous data format.
Note 1 : The async rate of 57.6 kbps is supported at the 56 kbps line
rate, provided the DTE equipment transmits two stop bits. Two stop bits
can be configured on most DTE equipment. This extra stop bit reduces
the DTE’s effective data rate by a few percent to allow synchronization
with the 56 kbps line speed. Set the Model 2500 Series for two stop
bits by selecting “11 bit character length” in the Character Length Menu.
(continued)
Circuit Assurance
Choosing option 2 in the Software Switch Menu takes you to the
Circuit Assurance Menu (below). On dedicated (DDS) circuits, the
transmitter and the CTS output can be configured to go ON only when a
working communication circuit is established. If you use Circuit
Assurance with DDS services, enable it on only one end of the
communication link. For Switched-56 service, enable Circuit Assurance
on both ends of the circuit. When Circuit Assurance is disabled, the
transmitter and CTS operate without regard to the receiver state.
Force RTS
Choosing option 3 in the Software Switch Menu takes you to the
RTS Menu (below). The RTS input can be forced ON, ignoring the RTS
signal from the DTE. RTS controls the transmitter by sending either
user data (when high) or idle code (when low). On a Model 2510 or
2520, Force RTS should be enabled for Switched-56 operation.
Note: When the Line Rate (Software Switch Menu option 1) is 64 kbps,
RTS is always forced ON, regardless of the Force RTS switch setting.
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