Dialogic 6.2 Manuale Utente

General Information

November 2009

268

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. 

 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.

answer_timer

50 ms

Timed Answer Supervision. 

Timer started after the last digit 

has been dialed. Used to report 

distant end answer when the 

protocol doesn't provide a 

specific signal to indicate the 

called party has answered the 

call.

IISDN56_ANSW_TIMER_

DEFAULT  (60) 

3 seconds

critical_timer

50 ms

Critical Interdigit Timer. While 

racking incoming distant digits, 

the maximum time to wait 

between digits before giving up 

and returning an incomplete 

rack.

IISDN56_CRIT_TIMER_

DEFAULT  (20) 

1 second