Avaya Digital Drop and Insert (DDI) MUX Instalační příručka stáhnout pdf (Strana 33)

Installing the DDI MUX 33

DDI MUX Installation Guide

The LEDs light under the following conditions:

Table 6 DDI MUX LEDs

LED

Description

TxD

(Transmit data)

The LED flashes at a rate equal to the number of zeros in the data received from the

DTE and transmitted over the network. The speed of the flashes is an indication of

the speed of the data sent over the network.

RxD

(Receive data)

The LED flashes at a rate equal to the number of zeros in the data received from the

network and transmitted to the DTE. The speed of the flashes is an indication of the

speed of the data sent over the network.

RTS

(Request to Send)

The LED lights when the DTE requests permission from the DDI MUX to send data.

CTS

(Clear to Send)

The LED lights when the DDI MUX is signaling the DTE that it has permission to

send data.

DCD

(Data Carrier Detect)

The LED lights when the Business Communications Manager is receiving a carrier

signal.

DSR

(Data Set Ready)

The LED lights when the DDI MUX is ready to communicate.

(Test Mode)

The LED lights when the DDI MUX is signaling to the DTE that it detects a test

condition.

(Power)

On indicates that the DTM is receiving +5 volts.

(Status)

On indicates there is data communication between the DDI MUX and the MSC card.

In Service Flashing indicates that the T1 trunks are out of service because a loopback test is

running or the DDI MUX is initializing.

Loopback On indicates a continuity loopback test is running on the T1 link.

Receive Alarm On indicates a problem with the received digital transmission on the T1 link. This

half-duplex link does not work.

Receive Error On indicates a small error as a result of degraded digital transmission on the T1 link.

Possible causes are an ohmic connection, water ingress, or too long a loop.

Transmit Alarm On indicates the DDI MUX cannot transmit on the T1 link. The DDI MUX sends an

Alarm indication signal (AIS) to the terminating switch. This half-duplex link does not

work.

Transmit Error On indicates the DDI MUX is sending a remote alarm indication (RAI) carrier failure

alarm (CFA) to the terminating switch. If the Transmit Alarm is not on, this error

indicates a far-end or cable problem.

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