Escape code    +++
 Return on-line ~ATO|
 Onhook         ATH0|
 Offhook        ~ATM0H1|
 Dial           ATDT
 +-Prefix
 +-Suffix       |
 Delay          7
 Init-1         ATH0|
 Init-2         ATB0X6E0V1Q0M3&A1&K0&M4&B1&G2&H1&R2|
 Init-3         AT&N0S0=0S7=50S10=40S11=60S15=8S19=2|
 Down           AT|
 Reset          AT|

ATZH0S=23=2S1=23S5=23Z