3.0 Modem Setup Options

The DTE-DCE Flow Control options are available for Hayes, V.25 bis, Dumb, and Leased-Line modes (except V.33).

NONE — No flow control is used.

RTS ON/OFF — The Request to Send signal controls data flow from the modem to the terminal.

DC1/DC2 — Inserts control characters (CONTROL-R and CONTROL-Q) in the data stream stop and start the flow of data from a device.

DC1/DC3 (X-ON/X-OFF)The most common method of flow control. It inserts control characters into the data stream: CONTROL-S stops the flow of data, and a CONTROL-Q restarts it.

NOTE

When using the modem for binary file transfer, in-band flow control (flow control using control characters) must be disabled. In this case, use hardware flow control or, as an alternative, lower the DTE speed to lessen the possibility of overflow.

The DCE-DTE Flow Control options are available for Hayes, V.25 bis, Dumb, and Leased-Line modes (except V.33). All information given above under DTE-DCE Flow Control options also applies to DCE-DTE (modem to terminal) flow control options, except that the CTS, Clear to Send,

signal is used to control DTE-DCE data flow instead of RTS.

Flyback Buffer options are available Hayes, V.25 bis, Dumb, Leased line modes (except V.33). The Flyback Buffer option is effective only when MNP error correction is active. Flyback buffering is used for specific applications such as printers, teletypes, etc.

ENABLE — If MNP is buffering data, a five-character delay is inserted after the following characters are sent to the terminal: HT (09), LF (0A), VT (0B), FF (0C), and CR (0D).

DISABLE — Flyback buffering will not occur.

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Black Box MD885AE-R2, MD885C-R2, MD885A-R3, 34336 user manual Modem Setup Options

MD885C-R2, MD885A-R3, MD885AE-R2, 34336 specifications

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