[asterisk-users] Asterisk call waiting with SIP

[amit salunkhe]

Hi
    any body have idea about asterisk call waiting with SIP if we use
asterisk1.4.5 & hard phone with extensions.
i need dial plan logic for this which capable to activate & deactivate such
feature.
     with ATA & IP phone it is possible but with normal hardphone & SIP in
asterisk is it possible to indicate call waiting?

plz help me for this

Amit
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