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Chapter 8 - Special Functions
8-8
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
110 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
EDR detection (either CNG or DTMF tones) will be disabled once it . However,
a customer’s program might not answer because the setting of the software may
require multiple rings to answer. S51 bits 0-1 control the number of rings that the
modem will report once the CNG or DTMF tone is detected.