This was raised thru this forum by a user in June 2019 with no comments. The issue still exists in S20 FW 126.96.36.199
When creating a new Queue, Caller Experience Settings, Periodic Announcements, Frequency drop down shows nothing less than 60 secs.
yet the default queue 6700 has a periodic announcement frequency set at 30 secs ( but drop down doesnt have anything less than 60s). Tested Que 6700 with periodic announcement at 30 secs and it works.
Creating a new queue comes populated with 60 secs but nothing less.
A work around is to modify the default 6700 queue and use its default frequency of 30 secs.
I would think this would be an easy fix via a FW upgrade? ( cant see this as a fix in latest May 14 th release 188.8.131.52 but havent upgraded as system is near to production and last FW upgrade stopped outbound calls)