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.

Special Functions 49

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ZyXEL Communications U-336R/RE manual Setting Up EDR, S51 Bit-mapped register default Bits Bin Dec Description