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ROC827 Instruction Manual
Issued Mar-06 Communications 5-12
Figure 5-5. EIA-422/485 (RS-422/485) J4 Jumper
Table 5-11. EIA-422 (RS-422) Module
Terminated Not Terminated
Jumper
TER Out Half Full TER Out Half Full
J3 x x
J4 x x
J5 x x
J6 x x
Table 5-12. EIA-485 (RS-485) Module
Terminated Not Terminated
Jumper
TER OUT Half Full TER OUT Half Full
J3 x x
J4 x x
J5 x x
J6 x x
5.9 Dial-up Modem Communications Module
The dial-up modem module interfaces to a Public-Switched Telephone
Network (PSTN) line, and requires a telephone line connection. The
module provides a telephone interface on the host port that is capable of
both answering and originating telephone calls. The module also provides
electronics that conserve power when the phone line is not in use.