This command causes the modem to transmit data using HDLC protocol and the modulation defined
below.
Syntax
+FTH=<mod>
Defined Values
<mod> Decimal number corresponding to the selected modulation mode
and data rates shown in Table 4-2.
Result Codes
CONNECT Reported for either of two conditions:
1.
At the beginning of transmission of the training pattern for the selected modulation.
2.
If the Final Frame bit is 0.
OK Reported for either of two conditions:
1.
If the Final Frame Bit is 1.
2.
if the DTE sends only <DLE><ETX> (a null frame) while transmitting flags.
ERROR Reported if five seconds elapse from the time when the modem
reported the CONNECT result code without any additional data
transmitted from the DTE; the modem then turns off carrier and returns to the command mode.
Reporting Current or Selected Values
Command: +FTH?
Response: +FTH: <mod>
Example: +FTH: 98 For V.17 9600 bps.
Reporting Supported Range of Parameter Values
Command: +FTH?
Response: +FTH?
Example: +FTH: 98 For V.17 9600 bps.
+FRH - Receive Data with HDLC Framing
This command causes the modem to receive frames using HDLC protocol and the modulation
defined below. An ERROR response code results if this command is issued while the modem is on-hook.
Syntax
+FRH=<mod>
Defined Values
<mod> Decimal number corresponding to the selected modulation mode
and data rates shown in Table 4-2.
Reporting Current or Selected Values
Command: +FRH?
Response: +FRH: <mod>
Example: +FRH: 98 For V.17 9600 bps.
Reporting Supported Range of Parameter Values
Command: +FRH?
Response: +FRH?
Example: +FRH: 98 For V.17 9600 bps.
Result Codes
CONNECT Reported for either of two conditions:
1.
When the selected carrier is detected with an HDLC flag.
2.
If the DTE sends aFTH=<MOD> command after
sending the result code indicating frame reception is complete.
+FCERROR Reported if a different carrier is detected and FAR=0.
NO CARRIER Reported if loss of carrier is detected.
OK Reported for either of two conditions:
1.
If a frame was received correctly.
2.
If the DTE sends any character other than XON or XOFF
while the modem is in the configured flow control.
ERROR Reported if a frame was received in error.
