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Example: A are talking with B. A press HOLD button for holding B line , and
dial the third party`s number , so A will talk with C . A press HOLD button again
for holding C line , A dial * , make three-way (or conference) calling
successfully.
Pro-condition: enable the three functions as below picture.
Note:
The function 4.4 & 4.5 & 4.6 could be started or closed thru system setting, so
when you need to use above three functions please make sure of opening
these functions.
5 Configuration Guide
5.1 Config IP Phone through Keypad
5.1.1 Menu Structure:
5.1.2 Keypad Corresponding Symbol Table
