[asterisk-users] is roundrobin and rrmemory the same meaning?

[Zhang Shukun]

Dear all,

I can't understand the diff between roundrobin and rrmemory strategy.
Could you explain for me ?

and is roundrobin means each available interface ring once or several
times and ring another?

; A strategy may be specified.  Valid strategies include:
;
; ringall - ring all available channels until one answers (default)
; roundrobin - take turns ringing each available interface
; leastrecent - ring interface which was least recently called by this queue
; fewestcalls - ring the one with fewest completed calls from this queue
; random - ring random interface
; rrmemory - round robin with memory, remember where we left off last ring pass
;
;strategy = ringall


Thanks!
-- 
Best regards,
Sucan