Appendix A AT Commands
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2 Enables DTE-controlled V.8 negotiation.
+A8T=<signal>,<1st_message>,<2nd_message>,<sig_en>,<msg_en>,<su
pp_delay>—Send V.8 bis Signal and/or Message
This command instructs the DCE to send a V.8 bis signal or message. This
command is only supported when V.80 is enabled.
Valid <signal> Values:
0None.
1 Initiating Mre.
2 Initiating MRd.
3 Initiating CRe, low power.
4 Initiating CRe, high power.
5 Initiating CRd.
6 Initiating Esi.
7 Responding MRd, low power.
8 Responding MRd, high power.
9 Responding CRd.
10 Responding Esr.
Valid <sig_en> Values:
0 Enables detection of initiation signals (default).
1 Enables detection or responding signals.
Valid <msg_en> Values:
0 Disables detection of messages (default).
1 Enables detection of V.8 bis messages.
Valid <supp_delay> Values
0 No delay inserted (default).
1 Inserts a 1.5 s delay between transmitted V.8 bis signal and the
subsequent V.8 bis message.
+DR<value>—Data Compression Reporting
Use this command to enable or disable the compression report. If the
compression report is enabled, the +DR:<type> intermediate result code
reports the current DCE-DCE data compression type. It is issued after the
error control report (+ER) and before the final result code (e.g., CONNECT).
