> 2.13.3 | Receiving Fax

> This section comprises the subsections Description, Used AT Commands, Flow Chart, Hints and Example. To move to these subsections please use the Navigation Frame or the appropriate buttons on the toolbar.

> 2.13.3.1 | Description

> This chapter describes the steps required to receive a fax document. In this case the application or the fax device sends the following AT commands, which will be discussed in details in the given examples.

> 2.13.3.2 | Used AT commands

> Class 1 and 2:

> Command | Explanation
> ATA | Answer a call
> ATH | Disconnect existing connection

> Class 1:

> Command | Explanation
> AT+FRH | Receive Data Using HDLC Framing
> AT+FTM | Transmit Data
> AT+FTH | Transmit Data Using HDLC Framing

> Class 2:

> Command | Explanation
> AT+FDR | Begin or continue phase C data reception

> For further details about the commands see [2].

> 2.13.3.3 | Flow chart

> Figure 111: Receiving Fax Class 1- part 1
> Figure 112: Receiving Fax Class 1- part 2
> Figure 113: Receiving Fax- Class 2

> 2.13.3.4 | Hints

> Not applicable.

> 2.13.3.5 | Example

> Example 1:
> A fax can be accepted with“ATA”. It results in a „CONNECT“. The command .„AT+FRH” causes the TA to receive frames using the High Level Data Link Control protocol (HDCL) and the modulation see [2].
> Figure 114: Phase A: Receiving fax (Class 1)
> “ATH” signals the end of the faxtransmission.
> Figure 115: Phase C-E: Receiving fax (Class 1)
> Example 2:
> After the “RING” indication the fax call is accepted with “ATA”
> Figure 116: Phase A: Start receiving fax (Class 2)
> “AT+FDR” queries whether Phase C (data reception) shall be continued. „+FPTS“reports received page status. „+FET:2“ shows that no further pages or documents are available. „ATH“ ends the connection.
> Figure 117: Phase C-E: End receiving Fax (Class 2)