User Manual Part 1

User Guide to Q4000/QPRO
Document Number 1135-4713 Rev G
THIS DOCUMENT CONTAINS CONFIDENTIAL AND PROPRIETARY INFORMATION OF QUAKE GLOBAL CORPORATION. IT MAY BE USED BY
RECIPIENT ONLY FOR THE PURPOSE FOR WHICH IT WAS TRANSMITTED AND WILL BE RETURNED UPON REQUEST OR WHEN NO LONGER NEEDED
BY RECIPIENT. DISCLOSURE TO UNAUTHORIZED THIRD PARTIES OR DUPLICATION WITHOUT THE EXPRESS WRITTEN PERMISSION OF QUAKE
GLOBAL IS PROHIBITED.
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2.8.2 Power off
There are a number of ways in which a controlled power-down sequence can be initiated on the
Q4000/QPRO modem:
• through a QCP call on the MTS port;
• by de-asserting the DTR line if the “power down mode” configuration parameter has been
set;
• function calls from custom applications written in ‘C’ can be used to initiate controlled power
downs from an internal application. Both QCP and the “C” programming library utilize the
function “SYS_pwrDownModem(duration)”. This command can be used to:
o power down the modem for a specific time interval;
o wake at a specific time with the use of the RTC;
o power down indefinitely and only be awakened by an external event such as
assertion of DTR or the application of power.
Please see the QCP and API reference for more details.