Software configuration, Modem types, Efd closed network operation – Comtech EF Data C5 User Manual
Page 194: 2 software configuration 4.2.1 modem types, 1 efd closed network operation
Operation
C5/K1/K3 Integrated Satellite Terminal System
4–68
Rev. 0
4.2 Software
Configuration
4.2.1 Modem
Types
Refer to Figure 4-19.
Refer to Table 4-1 for configuring the modem to the following types of operation. Each
type allows the user to operate the modem under the requirements of the configuration
specifications listed below.
Table 4-1. Modem Types
Configuration
Specification
EFD
EFData Closed Network
Custom
Access all modes
ASYNC
Asynchronous Overhead
Emulation Types
Specification
Revision Emulation
Emulates earlier released software remote protocol
4.2.1.1
EFD Closed Network Operation
The modem does not require any additional hardware installed to operate in EFD Closed
Network configuration. The basic modem configuration, which includes the 25-pin D
Data I/O connector, supports V.35, EIA-422, and EIA-232 data with no overhead. The
EFData closed network configuration allows the IDU to be compatible with any EFData
closed network application, including the SDM-300 modem.
The IDU can be compatible with other closed network applications by selecting different
modulator and demodulator types. Fairchild and Comstream compatible closed network
systems can be supported with the IDU modem. When selecting these modulator and
demodulator types, the modem becomes compatible with Fairchild or Comstream closed
network modems that may be at the distant end of the link.
Refer to Appendix A for more information on EFD Closed Network theory of operation.
Refer to Table 4-2 for EFD Closed Network parameter settings.