Edr Application Example - ZyXEL Communications U-336R/RE User Manual

EDR detection (either CNG or DTMF tones) will be disabled once
detection occurs. 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.
The timing relationship between the Caller ID (if enabled), EDR,
and ring detection is as follows:
ring1
***--------***--------***------------------------------
+------+---+------+---+------+---+-------------+----
CID/EDR RD EDR RD EDR RD
CID=Caller ID task
O O N : D
OTE URING THE
FUNCTION

EDR Application Example

If we use ZFAX as our fax receiving application and we don't want
it to answer the call unless it is a fax call, the way to set it up would
be:
1. Set ZFAX to answer on 2 rings.
2. Set S51.0=1 to enable EDR and report RING twice. The
3. Set S51.4=1 to enable fax CNG tone detection. It is reported as
50 Special Functions
ring2
3sec 3s 3s 3s S7 time-out
EDR
PERIOD
.
modem will not report a normal RING and ZFAX will not
answer a call unless EDR RING is reported.
RING.
ring3
RD=Ring Detection task
, AT
ANY COMMAND WILL DISABLE THE
EDR RD
EDR=EDR task
EDR