U-90E Data/Fax Modem
Special Functions
10-10
If the remote caller is an unattended fax machine, it will send a CNG tone for a period of
time. The modem will detect the CNG 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 answering machine
will ask the caller to press any DTMF key if he or she wants to send a fax. This will
activate the modem to report and subsequently be ordered to answer the fax call.
10.5.1 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)
Table 10-5 EDR Settings
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
