Matrix Telecom SIMADO GFX44 Quick Start Manual page 19

application in Multistage Dialing and in DTMF Outdialing using
AT Commands. Range of DTMF On Time is from 50 to 200 ms.
By default, DTMF ON Time is '100'ms.
• DTMF Inter Digit Timer: This is the time for which the system waits
after dialing out each DTMF digit. The range of this timer is from 20 to
200 ms.
By default, DTMF Inter Digit Timer is '100'ms.
• Rx Gain: Program Rx Gain in this field to improve the audibility of the
incoming speech. Valid options for Rx Gain are:
• Very Low
• Low
• Normal
• High
• Very High
By default, Rx Gain is Normal for each Mobile Port.
• Tx Gain (db): Program Tx Gain in this field to improve the output RF
signal from GFX44. Valid options for Tx Gain are:
• Very Low
• Low
• Normal
• High
• Very High
By default, Tx Gain is Normal for each mobile port.
• Frequency Band (MHz): Select GSM frequency band from the
following options:
• 900
• 1800
• 1900
• 850+1900
• 900+1800
• All Bands
By default, All Bands is selected.
Frequency Band selection is not supported if SIMCOM 3G module is
installed in SIMADO GFX44.
• Preferred Network Mode: Select Preferred Network Mode from the
following options:
• Dual Mode
• GSM
• UMTS
By default, Dual Mode is selected.