I have dual-line mode configured in a IP phone 7940 so when you are speaking and a new call comes you can see in the screen the call and the number. Then I answer the second call holding the first and try to transfer the new call to another extension but it's not posible.
Why I cannot transfer a second call when the first call is active?
I understand that you can't do a full-consult transfer on the second call, because both lines are taken already. However, the transfer should work in blind mode. I will try this at the office tomorrow.
I have changed it but the problem continues, I cannot transfer the second incoming call. I have changed the transfer-system to blind and full-blind, but everything continues equal. Is it necesary restart the telephone system or the IP phone?
this is my config now:
ip source-address 192.168.3.1 port 2000
auto assign 1 to 18
create cnf-files version-stamp Jan 01 2002 00:00:00
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