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change system-parameters maintenance
Issue 4 May 2002 8-45 555-233-123
Adjustable
Make/Break
Ratio
This field can be of particular importance when using a modem
that may be transferable from country to country. The intent of
this field is to control the make/break ratios of pulses and DTMF
dialing. The Intel product information has support for the
different make/break options for pulse dialing only.
Intel uses the option “&P0” to select a ratio of 39% make and
61% break for communication within the U.S. and Canada. The
option “&P1” sets a ration of 33% make and 67% break for the
U.K. and Hong Kong.
This field is 5 characters long and is case in-sensitive. ()
Dial Command
This field simply denotes the dialing command of the modem.
This is a fairly standard command. (D)
No Answer
Time-Out
Most off-the-shelf external modems provide a timer that
abandons any outbound data call after a predetermined
interval. Some modems provide for this timer to be disabled,
thus allowing an outbound call to ring indefinitely. AT&T
Paradyne does not provide this capability with their modem
line, because it is generally undesirable to have an outbound
call attempt ring indefinitely.
The internal modem must have this parameter disabled or set
to at least 255 seconds.
This is a non-administrable parameter. For the external modem
connection, this parameter will be the first initialization string to
be transmitted to the external modem. This field will be visible
on the administration form in display mode only.
This hardcoded constant can be overridden for type approval
applications, specifically in the U.K and other Western
European nations, by the use of the “Misc. Init. Param:” field.
(S7=255)