Configuration

Configuring the User Data Port

Select Physical to display or change the physical characteristics of the user data port connected to the DTE (see Table 3-5).

Main Menu Configuration Data Ports Physical

Table 3-5. User Data Port Physical Interface Options (1 of 2)

Port Type

Possible Settings: E530, V.35, X.21

Default Setting: V.35

Selects the type of port to be used for the user data port.

E530 ± The port is an EIA-530A-compatible DCE. An EIA-530-compatible DTE can be directly connected to the DB25 connector.

V.35 ± The port is a V.35-compatible DCE. A V.35-compatible DTE can be connected to the DB25 connector by using an adapter cable.

X.21 ± The port is a V.11/X.21-compatible DCE. A V.11/X.21-compatible DTE can be connected to the DB25 connector by using an adapter cable.

Transmit Clock Source

Possible Settings: Internal, External

Default Setting: Internal

Determines whether the DTE's transmitted data is clocked into the FrameSaver unit by its internal transmit clock or by the external clock provided by the DTE.

NOTE: Changing settings for this configuration option causes the FrameSaver unit to abort any physical port tests, including any DTE-initiated loopback tests.

Display Conditions ± This option does not appear when Port Type is set to X.21 (the signal is assumed to be asserted).

Internal ± The FrameSaver unit uses the interchange circuit DB (ITU 114) ± Transmit

Signal Element Timing (TXC) (DCE source) for timing the incoming data.

External ± The DTE provides the clock for the transmitted data, and the FrameSaver unit uses the interchange circuit DA (ITU 113) ± Transmit Signal Element Timing (XTXC) (DTE source) for timing the incoming data.

Invert Transmit Clock

Possible Settings: Auto, Enable, Disable

Default Setting: Auto

Determines whether the clock supplied by the FrameSaver unit on interchange circuit DB (ITU 114) ± Transmit Signal Element Timing (DCE Source) TXC is phase inverted with respect to the clock used to time the incoming Transmitted Data (TD).

Auto ± The port will check the clock supplied by the DCE on TXC on this port. If necessary, the port will automatically phase invert the clock with respect to the transmitted data.

Enable ± Phase inverts the TXC clock. Use this setting when long cable lengths between the FrameSaver unit and the DTE are causing data errors.

Disable ± Does not phase invert the TXC clock.

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March 2000

9664-A2-GB20-00

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Paradyne 9664 manual Configuring the User Data Port, Main Menu → Configuration → Data Ports → Physical, Port Type

9664 specifications

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