In some call center, to improve service quality, supervisor doesn't want to remain many waiting callers in queue for a long time if there is no available agent, they would like to route other waiting callers to failover destination immediately.
Yeastar S-Series IPPBX
1. Access ssh of device
2. Create queues_custom.conf under /ysdisk/support/customcfg/ and enter below content, replace queue number 6700 and the required max waiting caller number 5 accordingly.
maxlen = 5
4.support@IPPBX:~$ asterisk -rx 'module reload'