Avaya Digital Drop and Insert (DDI) MUX Instalační příručka stáhnout pdf (Strana 29)

Installing the DDI MUX 29

DDI MUX Installation Guide

Testing the DDI MUX

Use loopback tests to check the DDI MUX data transfer capabilities. For loopback tests you must

generate a test pattern or data traffic and provide a means to monitor the data path. The DDI MUX

provides 2 loopback tests. They are:

• DTE Loopback

• DS30 Loopback

The following applies:

• activate one loopback at a time

• activation of a DTE loopback can be manual or automatic

• manual control over loopback state has priority over automatic

• manual capability of releasing all loopbacks

Table 5 DDI MUX Configuration settings

Setting Description

Protocol The DDI MUX supports a V.35 interface standard through its data interface port.

Yo u c a n s e l e c t V. 3 5 .

B channel data

rate

Select the transmission rate per channel (Fixed data lines) assigned to the DDI MUX.

You can select an option: 64k or 56k.

Transmit clock

source

The DDI MUX requires a timing signal to clock data transmitted by the DTE. This signal

can be supplied by the DTE or generated internally by the DDI MUX. If the signal is

generated by the DTE, the clock must be locked to the frequency of the DDI MUX clock.

You can select: Auto, DTE, or DCE.

• Auto: The DDI MUX checks if the clock provided by the DTE is valid. If the clock is

valid, the DDI MUX uses DTE clocking. If the DTE clocking is not valid, the DDI MUX

uses its own internal clock (DCE).

• DCE: The internal TxSync clock is used to clock data.

• DTE: The TXClk clock provided by the DTE is used by the DDI MUX to clock data.

Note: Use the DTE option only for diagnostic purposes.

For all options, the DTE must synchronize to the DDI MUX.

Transmit clock

inversion

When the internal DCE signal is used to clock in data, signal delays caused by cable

length can cause clocking errors. To adjust for round trip delays between the DDI MUX

and DTE, invert the internal clock used by the DDI MUX to clock in data from the DTE.

To enable clock inversion, select the DTE clock or Auto clock.

You can select: Off or On.

Data inversion When Data Inversion is on, the DDI MUX inverts the data before routing it to the T1

connection and DTE. Inversion allows the DDI MUX to use the properties of protocols

such as HDLC/SDLC (a transmission standard for data) to meet the ones density

requirement of the network. This feature must be available and activated at the far end.

You can select: Off or On.

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