Dialogic 6.2 manual Timer Definitions, November 268

General Information

Timer Definitions

The LEC structure (named IISDN_ROBBED_BIT_DATA for historical reasons) contains a series of 16-bit values used to configure the various timing parameters associated with the protocols.

Table 13 lists the timers in alphabetical order and contains each timer's unit, meaning, and default value. The unit indicates by how much a timer value must be multiplied to find its actual duration in milliseconds, while the default (the number in parentheses following its define value) indicates the number of ticks.

Proper timing with LEC protocols is very important. There are over 30 unique timings that are set, with a significant subset of these applicable to several protocols. You should match their entries in the table to the appropriate timing diagrams.

Table 13. Robbed Bit Signaling Timers

Timer	Granularity	Definition	Default Value
answer_timer	50 ms	Timed Answer Supervision.	IISDN56_ANSW_TIMER_
		Timer started after the last digit	DEFAULT (60)
		has been dialed. Used to report	3 seconds
		distant end answer when the
		protocol doesn't provide a
		specific signal to indicate the
		called party has answered the
		call.
critical_timer	50 ms	Critical Interdigit Timer. While	IISDN56_CRIT_TIMER_
		racking incoming distant digits,	DEFAULT (20)
		the maximum time to wait	1 second
		between digits before giving up
		and returning an incomplete
		rack.

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