Modem table

Modem records are used to represent modems that dial to obtain a connection to one or more remotes. Modem records are located in the modem table and are configured using the modem Row Edit dialog box.

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Omnicomm takes a host-centric view of what constitutes a "modem." If a modem at the host end must dial to obtain a connection to one or more remotes, then an Omnicomm record must be configured for the modem. This applies whether or not the modem dials to the Public Switched Telephone Network (PSTN) or within some kind of leased network.

All of the modems that are used for real time field communications with remotes are managed using modem banks. A modem from this bank is assigned to a connection, usually on a temporary basis, according to the former’s use and intended function.

An Omnicomm record is not configured for the following:

• Any modem attached to a remote unit (for example, Programmable Logic Controller (PLC) or Remote Terminal Unit (RTU)).

• Any modem at the host end that does not require dialing.

This applies to leased-line modems that are either multi-drop or point-to-point and to combination radio/modems. Although Omnicomm must be correctly configured for these devices, specific records on a per-radio or per-modem basis are not required. Necessary configuration parameters reside in the associated connection and remote records.