On cisco when the external call is transferred to a cisco Ip phone. The correct caller id is correctly shown just after the call has been connected and not while ringing. Even if it's a blind transfer. is itnormal behaviour?
On the gigaset , which are third party sip devices, they show "standard" all the time even after completing the transfer.
When i make a test call from my external phone to standard , this last can transfer my call to another ip phone cisco , but when the cisco rining it show just the name and number of standard , when the cisco ip phone accept the call , my external number appear on cisco ip phone .