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ATS7 Wait for Carrier
S Register 7 contains a value, in seconds, equivalent to the length of time the modem will wait
for answer tone after dialling. If an answer tone is not detected within the time specified in this
register, the modem will hang up and return a NO CARRIER message. After an answer tone is
detected the modem has another 57 seconds to complete the handshake
The answering modem has 57 seconds to complete the handshake after starting answer tone.
This register is also used by the W modifier to determine how long the modem will wait for a
dial tone to be applied to the line before reporting a NO DIALTONE message.
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UK Modems. Setting S Register 7 with a value above 58 may invalidate the
approval of your modem. S Register 7 must be set to 20 before issuing the W dial
modifier. Any other change to this register will invalidate the approval of your
modem.
Examples
ATS7=20 Wait for 20 seconds for a connection
Default
30
Range
1-60