Multitech MMH900 User Manual page 136

length of the pause of the comma, from two seconds
to any other value from 0 up to 255 seconds. This is
accomplished by accessing S-Register S8 which we
explain in the Command Modem Commands
Section.
Each comma used in a dialing command does count
as one of the forty allowed characters.
; Returning toCommand Mode After Dial
Command Execution
A semicolon (;), when entered as the last character
of a dialing command, will cause the command
modem to return to the Command mode
immediately after executing the command, instead
of waiting for a carrier signal and going on line.
For example, entering ATDT5551212; would simply
tone-dial the number, and do nothing afterwards
except go back into Command Mode. This can be
useful in dialing applications where command
modem data transfer is not desired, such as voice
communications.
+++ Escape Sequences Entering Command Mode
While Still On-Line
It is possible to cause the command modem to enter
the command mode after the command modem has
gone on-line without disconnecting the call. This is
accomplished by entering an Escape code. The
default Escape code is three plus.signs (+++). You
need not hit Return. The Escape code character
may be changed by accessing S-Register S2 which
is explained in the Command Modem Commands
Section.
There is a safety factor built into the command
modem, that requires about one second of silent
time before and after the Escape code +++ is
entered, to prevent accidental escapes into the
Command mode. The command modem will not
release the telephone line until it receives an ATH or
ATZ command, or it detects loss of carrier.
Appendix D - Command Modem Commands
136