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8–22
S52 Bit-mapped register, default: 0:
S53 Reserved.
S54 Reserved.
S55 Reserved.
S56 Hook flash time in 10ms units. A value of zero activates the standard
specification of the country the modem is approved in; default: 0.
S57 Bit-mapped register, default: 0:
10 8 Reports RING <DTMF> for a DTMF tone.
11 12 Reserved.
(1,0) 00 0 Disables EDR.
01 1 Reports RING twice.
10 2 Reports RING four times.
11 3 Reports RING six times.
Code Bits Bin. Dec. Description
(7) 0 0 Selects 'Mark' as the first signal of the V.23
handshaking sequence. (Default)
1 128 Selects 'Space' as the first signal of the V.23
handshaking sequence.
(6,5) Reserved.
(4,3) 00 0 Receive level sensivity -43 dBm. (Default)
01 8 Receive level sensivity -33 dBm.
10 16 Receive level sensivity -26 dBm.
11 24 Receive level sensivity -26 dBm.
(2,1,0) Reserved.
Code Bits Bin. Dec. Description
(7) Reserved.
(6) 1 64 Enables busy detection in dialing period.
(5) Reserved
(4) 1 16 Enables the reporting of Class 1 capability in
the response to +FCLASS=?.
(3-0) Reserved.
Code Bits Bin. Dec. Description