Avaya 6424D+M Bedienungsanleitung PDF herunterladen (Seite 56)

In the data mode, data transmitted to the data terminal consists of one start bit, eight information

bits, and one stop bit. The parity of data received from the network is transported to the data

terminal without alteration, except if requested to do so by X.29 message from a remote X.25

host.

In the Local Mode, data to the data terminal consists of one start bit, eight ASCII formatted

information bits, and one stop bit. The parity is set as indicated by the Parity option.

Pin 4 - Request-to-Send (CA)

For data modes other than Mode 2, the Request-to-Send circuit can be used by the data terminal

to control data transmission depending on how the Receive Flow Control option is set. If the

rec.flow option (Receive Flow Control option) has been set to eia, this lead is utilized as follows:

ON - indicates the data terminal is ready to receive data, OFF - indicates the data terminal is not

ready to receive data.

If the Rec.Flow option has been set to xon/xoff, the Request-to-Send signal is ignored.

Pin 5 - Clear-to-Send (CB)

For data modes other than Mode 2, the Clear-to-Send circuit is controlled by the ADM to

indicate when data can be received from the data terminal. If the trans.flow option (Transmit

Flow Control option) has been set to eia, Clear-to-Send is used for flow control as follows: ON -

the ADM is ready to receive data, OFF - the ADM is not ready to receive data. For Mode 2, this

transmit flow control operation applies when the physical EIA port speed is higher than the

current channel throughput (handshake) speed.

Pin 6 - Data Set Ready (CC)

Data Set Ready is ON while power is available.

Pin 7 - Signal Ground (AB)

This circuit provides the common reference level for all signals at this interface. Signal ground is

direct current isolated from the power source.

Pin 8 - Received Line Signal Detect (CF)

This circuit indicates the presence of a data call connection. If the DCD option is set to

IGNORE, the Received Line Signal Detect circuit is ON while power is available, turning OFF

for 1 second after a call has been cleared. If the DCD option is set to FOLLOW, the signal on

this circuit is ON after a call has been connected and goes OFF once the call has been cleared.

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Avaya 6424D+M Bedienungsanleitung Seite 56