Understanding queue statistics


How the number of calls presented to the queue (C: 40) can be fewer than the number of answered calls (A: 242) ?

pbx-office*CLI> queue show 45_support_terminal 
45_support_terminal has 0 calls (max unlimited) in 'ringall' strategy (3s holdtime, 74s talktime), W:0, C:40, A:242, SL:100.0% within 20s
      SIP/1358 (Not in use) has taken 6 calls (last was 2605 secs ago)
      SIP/1365 (Not in use) has taken 15 calls (last was 61140 secs ago)
      SIP/1359 (Not in use) has taken 1 calls (last was 84080 secs ago)
   No Callers

It’s written in the Book:

[quote]C: Number of calls presented to this queue
A: Number of calls that have been answered by a member[/quote]

And if to summarize 6 + 15 + 1 we’ll get 22, not 242.
If I do ‘queue reset stats 45_queue_terminal’, the statistics will be reseted. But then during some time it becomes odd, something like this.

If I remember correctly then
C is for Connected calls (Answered calls)
A is for Abandoned calls

–Satish Barot

The 4th edition of the book is based on Asterisk 11 , as far as I remember.
The server I work with has 1.6. Maybe understanding of queue statistics depends on version.