ZyXEL U-336E User Manual - Page 54

ONOTE: 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 ring2 ring3 3sec 3s 3s 3s S7 time-out CID/EDR RD EDR RD EDR RD EDR RD CID=Caller ID task RD=Ring Detection task EDR=EDR task DURING THE EDR PERIOD, ANY AT COMMAND WILL DISABLE THE EDR 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 modem will not report a normal RING and ZFAX will not answer a call unless EDR RING is reported. 42 Special Functions