Table 120. Command Modulation Select Codes - Motorola g20 Developer's Manual

AT Commands Reference
The following table shows the command modulation select codes.
<MOD> Value
24 Rec. V.27 ter
48 Rec. V.27 ter
72 Rec. V.29
96 Rec. V.29
Example
AT+FCLASS=1
OK
ATD035658584
CONNECT 19200
AT+FRH=3
CONNECT 19200
(Terminal sends TSI frame data, as described in ITU-T30 with terminating sequence)
CONNECT 19200
(Terminal sends DCS frame data, as described in ITU-T30 with terminating sequence and drops the carrier)
OK
4.14.1.7 +FRH, Receive DATA with HDLC Frame
This command causes the g20 to receive HDLC framed data using the modulation mode selected in <MOD>, and deliver the
next received frame to the terminal.
If the g20 detects the selected carrier with an HDLC flag, the g20 send the CONNECT result code to the terminal, otherwise it
sends "NO CARRIER".
The g20 sends the FCS octant to the terminal. The terminal may ignore the FCS.
Upon receipt of the CONNECT from g20, the terminal can start receiving the data stream using the transparent data command
decoding. (Refer to "Command Modulation Select Codes" on page 233.)
After the FCS octets are transferred, the g20 marks the end of the frame with the characters <DLE> <ETX>, and reports the
status of the frame reception to the terminal, as follows:
• If the frame was received correctly (FCS is OK), the g20 returns the OK result code.
• If the frame was received in error (FCS is not OK, or carrier lost, or data lost due to data overflow), the g20 returns the
ERROR result code, and the terminal should discard the frame.
236

Table 120. Command Modulation Select Codes

Modulation Parameters
Modulation TrainTime
//The g20 detected the terminating sequence
Rate (bit/s)
2 400
4 800
7 200
9 600
Required
98-08901C68-O