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Appendix D - AT Command Summary
RF300E/RF310E 143
If the Calling Party Number information is not included in the incoming SETUP
message, then the RING message appears as follows:
RING
TO: 5551000
If the Called Party Number information is not included in the incoming SETUP
message, then the RING message appears as follows:
RING
FM: 5551000
If neither the Called Party Number nor Calling Party Number is included in the
incoming SETUP message, then the RING message contains no additional
information.
S-Register: S52
Usage: S52=n; S52?
Function: Auto-Protocol Detection
Unit: Decimal ASCII code
Range: n=0 (Disable),
n=1 (Detect),
n=2 (Detect and Select)
Default: 1 (Detect)
Description: S52 enables or disables the ability to identify the reception of V.110, V.120, X.75, or
PPP data calls. The TA determines the type of call by checking for protocol
information in the SETUP message or by matching protocol information received on
the B-channel once connected if no protocol information is available in the SETUP
message. Once the protocol is determined, the TA will switch its data protocol to
match. Upon disconnect the TA will revert its data protocol selection back to the
protocol that was selected before the call was received when S52=1 “Detect”. If
S52=2 “Detect and Select”, then the TA will not revert the protocol selection, rather it
will keep the detected data protocol as the new protocol selection. “Detect and
Select” is useful for applications where the TA receives a call and then the software
performs callback. Callback calls should be made with the same protocol that was
used by the client so “Detect and Select” enables this possibility. However, if an
initialization string or &Fn command is given to the TA that changes the protocol after
the disconnection, then “Detect and Select” will not be effective. Make sure no
commands are given to the TA that will change the data protocol when using “Detect
and Select” if callback is involved to ensure that the callback call uses the correct
data protocol.
S-Register: S53
Usage: S53=n; S53?
Function: Maximum X.75 Buffer Size
Unit: 1 bytes
Range: n=6D-2048 (6D-2048 bytes)
Default: 2048 (2048 bytes)
Description: S53 allows the maximum buffer size of an X.75 frame to be customized. Typically a
smaller frame size is more compatible with software packages on a PC (such as
HyperTerminal). Larger frame sizes introduce larger delay which some software
cannot deal with appropriately.
S-Register: S54
Usage: S54=n; S54?
Function: B-Channel Origination Rate
Unit: Decimal ASCII code
Range: n=0 (64Kbps, but use Progress Indicator IE)
n=56 (56Kbps)
n=64 (64Kbps)
Default: 0 (64Kbps, but use Progress Indicator IE)