User`s manual

Special Functions 41
tone and report RING to the software immediately. The software
application can then issue commands to answer the call and receive
the fax. If the remote caller is using a fax phone which does not
send out a CNG tone and is waiting for a fax answer tone in order
to press the START button, the caller can press a designated
DTMF tone, which will activate the modem to report and
subsequently be ordered to answer the fax call.
Setting Up EDR
The new EDR can be used at home where multiple phones are
installed in parallel. Once this function is enabled, the modem will
go into EDR mode after the ring disappears, and it will be able to
detect the data/fax CNG tone and DTMF tones, and report them as
different types of rings. The EDR settings are defined in S-register
S51.
S51 Bit-mapped register: (default: 0)
Bits Bin. Dec. Description
(7,6) 00 0 Disable data CNG tone detection (default).
01 64 Report RING for data CNG tone.
10 128 Report RING 1 for data CNG tone.
11 192 Report RING 3 for data CNG tone.
(5,4) 00 0 Disable Fax-CNG tone detection (default).
01 16 Report RING for fax CNG tone.
10 32 Report RING 1 for fax CNG tone.
11 48 Report RING 2 for fax CNG tone.
(3,2) 00 0 Disable DTMF tone detection (default).
01 4 Report RING for a DTMF tone.
10 8 Report RING <DTMF> for a DTMF tone.
11 12 Reserved
(1,0) 00 0 Disable EDR (default).
01 1 Report RING twice.
10 2 Report RING four times.
11 3 Report RING six times.