User's Manual

one and then it outputs a successive completion response (P0) to its terminal equipment.

When the remote receiver modems receive the transmitted data successfully, they output

the data to their terminal equipments normally and do not return ACK packet. Once a valid

data packet has been received correctly by a receiver modem, rest of data received during

any subsequent retransmissions are discarded and not output to its terminal equipment.

Sender Modem Remote Modem

Figure 3–3: Broadcast Transmission

3.2.3 Transmit Command and Receive Header

Six transmit commands can be used in packet transmission mode . Both text and binary

data can be sent directly from modem-to-modem or sent through a third FDL01TU modem

configured as a repeater. The receiver modem automatically determines the transmitted

data format and communication path from the information in the received packet header.

Refer to the table below for a list of the transmit commands and the corresponding header

component.

Transmit Command

Receive Header

Function

TXT RXT

Text data transmission

TBN RBN

Binary data transmission

TXR RXR

Text data transmission via repeater

TBR RBR

Binary data transmission via repeater

TX2 RX2

Text data via two repeaters

TB2 RB2

Binary data via two repeaters

Table 3–5: Transmit Commands and Receive Headers

Data Transmission

Retransmission

・

End