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Transfer throws error : CSTA Error: 21 and drops the call.



Transfer throws error : CSTA Error: 21 and drops the call.

Error Messages

CSTA Error: 21 (one CSTA Error 21 logged out the agent and dropped the caller when clicked ok on error popup)

Steps to Reproduce

When attempted Blind transfer, got CSTA Error: 21
Blind transfer is done to 800 numbers during survey transfers.

Root Cause

Missing a number 1 before the 800


Dial plan change to ensure a 1 800 is being dialed. 
Suggest Edit

Published June 12, 2015 - Updated October 8, 2020

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