Paradyne 3821PLUS manual DTE Interface Configuration Options, Async/Sync Mode Async Nxt Async Sync

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Table 3-4

(1 of 6)

DTE Interface Configuration Options

Async/Sync Mode: Async

Nxt Async Sync

Asynchronous/Synchronous Mode. Determines whether the modem operates in Asynchronous mode or Synchronous mode. If the AT command set is enabled and this configuration option is set for Sync, then the modem operates in Async mode when offline.

For Async Dial and UNIX Dial, Async is the factory default. For Sync Dial and Sync Leased, Sync is the factory default.

AT command equivalents are &Mn and &Qn.

Async DTE Rate:19200

Nxt 19200 115200 76800 57600 38400 14400 12000 9600 7200 4800 2400 1200 0 ±300

This configuration option only appears if Async/Sync Mode is configured for Async.

Asynchronous DTE Data Rate. Identifies the asynchronous DTE's operating rate to the modem. Data rates from 115,200 bps to 300 bps are supported.

To originate calls in 76,800 bps Sun Workstation environments, use either SDCP dialing, DTR dialing, or handset dialing. The modem does not support AT command dialing at this data rate.

To prevent losing data in 115,200 bps applications, DTE cables should be kept as short as possible. For IBM-compatible PCs, a buffered UART (such as a 16550A) should be used, in conjunction with software that utilizes its 16-byte buffer.

NOTE: This configuration option is ignored in Async Direct mode and synchronous mode since the DTE rate always equals the VF rate.

The factory default is 19,200 bps.

There is no AT command equivalent; AT prefix determines Async DTE Rate.

Async #Data Bits: 8

Nxt 8 7 9(DirectMde) 6(DirectMde)

This configuration option only appears if Async/Sync Mode is configured for Async or DTE Dialer Type is enabled.

Asynchronous Number of Data Bits. Determines if the asynchronous data length is composed of 6, 7, 8, or 9 data bits. This data length excludes start, parity, and stop bits.

8 ± Sets data length to 8 data bits.

7 ± Sets data length to 7 data bits.

9(DirectMode) ± Sets data length to 9 data bits. Only valid when Error Control configuration option is set to Direct Mode.

6(DirectMode) ± Sets data length to 6 data bits. Only valid when Error Control configuration option is set to Direct Mode.

The factory default is 8 data bits.

NOTE: The total character size for Buffer mode must be 10 bits. The total character size for Direct mode must be 11 bits or less, and Async #Data Bits must be 7 or 8.

There is no AT command equivalent; AT prefix determines the async character length.

3821-A2-GB20-40 January 1999 3-19