Blind Transfer to invalid (nonexistent) extension

[that1guy]

Greetings,

Scenario:
Caller calls in and is answered by x100. x100 attempts a blind transfer to x104. By mistake, the user at x100 enters "204" instead of "104". The transfer does not complete, and the call is then dropped. The user would prefer not using Attended Transfer.

My initial response was to type the destination extension correctly, but mistakes happen. I need to find a way to have the call returned to x100, versus being dropped. Any suggestions?

 

[that1guy]

Update:

I found this article: https://www.3cx.com/docs/blind-transfer-callback/

Anyone know of a similar solution, but for invalid/nonexistent extensions?