Black Box MD1276A, User Manual

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Page 220
ATS27 Delay Before Dial
S Register 27 is used to define a delay of between 0 and 255 seconds which occurs after the D
command is issued and before dialling commences.
This should only be used when you intend to implement callback security. Providing a delay
between the dialling command and actual dialling allows the calling modem sufficient time to
hang up before the modem begins to call back.
A 30-second delay should be sufficient time to allow most modems to hang up.
When you are not using security callback, this register should always contain a zero value.
+
UK Modems. Waiting 30 seconds may not work with UK telephone exchanges.
Consult the supplier of your telephone line for a solution.
Example
ATS27=10 Wait 10 seconds between the Dial command being issued and commencement
of the dialling
Default
0
Range
0-255