Longshine LCS-8156C1 - Manual (Page 124)

AT Commands for CX930xx Modem Reference Manual
3-100 Conexant 102752B
S17 - Point Of Sale Options Selection
S17 selects the different options available for Point of Sale applications.
Default: 0 (00000000b)
Bit 0 V.80 sub-mode selection (applicable only if V.80 Synchronous Access
Mode is enabled; see +ES command)
0 = Enable transparent sub-mode. (Default)
1 = Enable framed sub-mode.
Note: When V.80 is enabled in V.22 fast connect ($F2) or
V.29FastPOS ($F4), the modem automatically connects in
framed sub-mode even if bit1 = 0.
Bit 1 V.22bis/V.22/Bell 212 early data mode selection
0 = Enable normal V.22bis/V.22/Bell212 handshake.
(Default)
1 = Enable early data mode (CTS turned ON sooner) for
V.22bis/V.22/Bell 212.
Bit 2 Logical/physical hang-up selection (applicable only if V.80 Synchronous
Access Mode is enabled; see +ES command)
0 = Enable logical hang-up if remote had already dropped its
carrier when ATH command is issued to the modem.
Otherwise, the modem waits for S38 delay before it
physically disconnects. (Default)
1 = Enable physical hang-up if remote side had already
dropped its carrier when ATH command is issued to the
modem. Otherwise, the modem does not wait for S38
delay but hangs up immediately.
Bit 3 Enable/Disable HDLC in V.22 fast connect (applicable only in V.22 fast
connect mode ($F2 is selected), and &Q0, &Q5, or &Q6 is selected)
0 = Enable asynchronous mode. (Default)
1 = Enable HDLC (synchronous mode).
Note: If V.80 Synchronous Access Mode is enabled, the modem will
automatically connect in V22 fast connect synchronous mode
even if bit 3 = 0.
Bit 3 V.22 fast connect synchronous mode handshake selection (applicable
only in hardware synchronous mode, i.e., &Q1, &Q2, or &Q3 is selected)
0 = Select standard handshake (scrambled ones are sent
during handshake). (Default)
1 = Select SDLC handshake (scrambled flags are sent during
handshake).
Note: If V.80 Synchronous Access Mode is enabled, the modem will
automatically connect in V22 fast connect synchronous mode
even if bit 3 = 0.
Bit 4 V.29 FastPOS mode selection
0 = Enable V.29 FastPOS. (Default)
1 = Enable V.29 FastPOS alternate sequence.