Matrix ETERNITY NE System Manual 185
• DTMF Inter-Digit pause Timer (msec): When the CO port dials out the DTMF digits on the CO, it
waits for the Inter Digit Pause Timer, while dialing the DTMF digits on the CO. Set the pause timer to
the desired value. Default: 102 milliseconds.
The 'level' of each DTMF digit is fixed, at -6.0 dB, but you may configure these parameters to match the
CO network requirement.
14. Configure the following DTMF Detection parameters, if necessary. The default settings of DTMF
Detection serve the requirements of most of the applications. However, you may fine tune the following
parameters if you face any problems in DTMF detection.
• Minimum Level (dB): This is the minimum level (dB) of the DTMF digit to be considered as valid.
Default: -4.5dB.
• Minimum ON Time (msec): This is the minimum time period for which the DTMF signal should be
present in order to be detected. The valid range of this time is 17 to 204 milliseconds. By default: 34
milliseconds.
• Minimum OFF Time (msec): This is the minimum time period between successive DTMF digits. The
valid range of this time is 17 to 204 milliseconds. Default: 68.
15. Set the following Timers, if necessary.
• Speech Delay Timer: It is the time after which the system gives dial tone to the extension, when the
extension user grabs the CO Trunk.
To understand the significance of this timer, let us consider a situation. Extension 201 does not have
calling permission for long distance numbers. The user of extension 201 grabs a CO Trunk, and dials a
number 1022-6305555. The system dials out this number, as it starts with '1', but since the actual dial tone
from the CO comes after some time, the CO interprets this number as 022-6305555 and establishes
speech. This way an extension user who does not have permission for long distance calling, can dial out a
long distance number. This can be prevented by configuring the Speech Delay Timer to an appropriate
value.
The range of this timer is from 000 to 255 seconds. Default: 1 second.
• Pause Timer: It is the time for which the system waits after grabbing the CO Trunk to dial out an external
number.
When the system automatically dials out the number
51
, if the CO network is of the old type, it is possible
that the system may dial out the number even before it gets the dial tone. This may result in a wrong
number being dialed out. The Pause Timer helps avoid this.
When features such as Redial or Auto-Redial or Abbreviated Dialing are used, the ETERNITY NE grabs
the trunk line, waits for the Pause Timer before dialing out the number.
The range of this timer is from 0500 to 3000 milliseconds. Default: 1000 milliseconds.
50. These DTMF Out Dial attributes would be used when the features Redial, Auto Redial and Abbreviated Dialing are used to dial out
the numbers from the CO port. These attributes are also applicable when you make a call from a DKP that has DTMF generation
disabled.
51. When features such as Redial or Auto-Redial or Abbreviated Dialing are used, the ETERNITY grabs the trunk line and dials the
number on its own.
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