ZyXEL Elite 2864 User Guide - Page 146

The EDR settings are defined in S-register S51. S51 Bit-mapped register, default: 0: Code Bits (7,6) (5,4) (3,2) (1,0) Bin. Dec. Description 00 0 Disables data CNG tone detection. 01 64 Reports RING for data CNG tone. 10 128 Reports RING 1 for data CNG tone. 11 192 Reports RING 3 for data CNG tone. 00 0 Disables Fax-CNG tone detection. (Default) 01 16 Reports RING for fax CNG tone. 10 32 Reports RING 1 for fax CNG tone. 110 48 Reports RING 2 for fax CNG tone.. 00 0 Disables DTMF tone detection. 01 4 Reports RING for a DTMF tone. 10 8 Reports RING for a DTMF tone. 11 12 Reserved. 00 0 Disables EDR. 01 1 Reports RING twice. 10 2 Reports RING four times. 11 3 Reports RING six times. EDR detection (either CNG or DTMF tones) will be disabled once it occurs. However, a customer's program might not answer because the setting of the software may require multiple rings in order 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: 1st 2nd 3rd on off on off on 3s 3s 3s 3s S7 timeout CID/EDR RD EDR RD EDR RD EDR RD CID: Caller ID task RD: Ring Detection task EDR: EDR task Note: During the EDR period, any AT command will immediately disable the EDR function. 13-8