1.2 Receiving Group Features
2.Busy on Busy
The Busy on Busy feature works when the destination for the Intercept
a)There is no space in the Waiting queue.
b)The Queuing Time Table is not assigned and there are no extensions
[Example of a)]
When the answering agent number ( 
Maximum Number of Agents [632]) is "2", and the queuing call number ( 
Queuing Call Capacity [628]) is "0":
There are five assistants in the shop. If two of them are engaged on the phone, the next caller will hear a busy tone to prevent the caller from thinking that there is no one in the shop or that the shop is closed.
Conditions
[Intercept
•If the Overflow time expires, and the overflow destination is unavailable:
a)If the trunk call arrives through the LCOT or T1 (LCOT/GCOT) card: (1) The line is disconnected when the call was once in a queue and an outgoing message (OGM) was sent to the call, or when the call reached an incoming call distribution group by using the DISA feature ( 
1.16.6 Direct Inward System Access (DISA)). (2) Except for the above, redirection is ignored and the Overflow timer activates again.
b)If the call arrives through the other cards: Redirection is ignored and the Overflow timer activates again.
[Busy on Busy]
•If a trunk call arrives through the LCOT or T1 (LCOT/GCOT) card, a busy tone will not be sent to the caller.
Feature Guide References
1.2.2.3 Queuing Feature
Feature Guide
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