Paradyne 3980-A2-GZ40-20 manual DTE Interface Configuration Options for SDC

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Table 2

DTE Interface Configuration Options for SDC

Sync DTE Rate: 128000

Nxt 128000 115200 112000 96000 76800 72000 64000 57600 56000 48000 38400 28800 19200 14400 9600 4800 2400 1200

This configuration option does not appear when:

•Async/Sync Mode configuration option is set to Async.

•Sync Comp Mode configuration option is set to DirectMode.

•Tx Clock Source configuration option is set to External.

•The SDC feature is disabled.

Synchronous DTE Data Rate. Identifies the synchronous DTE's operating rate to the modem. Data rates from 128,000 bps to 1200 bps are supported.

NOTE: A cable less than fifty feet in length is required for rates over 19,200 bps. Data synchronization at rates over 57,600 bps is sensitive to cable length and capacitance, and the DTE's drivers and receivers. External transmit clocking may be required.

The AT command for Sync DTE Rate is S30=n. See Table 4, page 10.

Tx Clock Source: Internal

Nxt Internal External RXC_Loop

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

Transmit Clock Source. Determines the source of timing for synchronous data transmitted from the DTE.

Internal ± The transmit data's clock source is derived from the modem's internal clock. This clock is available as an output on Pin 15 (TXC) of the EIA-232-D interface.

External ± The transmit data's clock source is provided by the DTE on Pin 24 (XTXC) on the EIA-232-D interface.

Receive Clock Loop ± The modem's transmit clock is derived from its received analog signal. The derived clock is available as an output on Pin 15 (TXC) of the EIA-232-D interface.

NOTE: RXC_Loop does not appear if SDC is enabled.

NOTE: TMp tributaries are forced to RXC_Loop.

The AT command for Tx Clock Source is &Xn.

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November 1996

3980-A2-GZ40-20

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Contents Overview Sample DTE Exchange of Data via Synchronous Protocol and SDCInstalling the SDC Feature Installing the SDC Feature Using the DCPInstalling the SDC Feature Using AT Commands Menu Status and Result CodesSDC User Interface 42/MNP/Buffer see Table42/MNP/Buffer Configuration Options for SDC 42/MNP/Buffer Configuration Options for SDC 42/MNP/Buffer Configuration Options for SDC DTE Interface Configuration Options for SDC DCP LCD Registers for SDC Description Register Registers for SDC Description DTE and DCE Frames Synchronous Data FormatSDC Algorithm Data Synchronization Clocks at the DTE±DCE InterfaceFlow Control Method SDC NegotiationMonitoring SDC Performance Tuning SDC Efficiency DTE ConfigurationModem Configuration Software License AgreementTerm

3980-A2-GZ40-20 specifications

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