Consultation Call Transfer

The device supports Consultation Call Transfer. It supports Consultation Call Transfer using the SIP REFER message and the Replaces header.

The common method to perform consultation transfer is described in the following example, which assumes three call parties:

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A = transferring party

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B = transferred party

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C = transferred to party

1.

A Calls B.

2.

B answers.

3.

A presses the hook-flash button and places B on-hold (party B hears a hold tone).

4.

A dials C.

5.

After A completes dialing C, A on-hooks the phone to transfer the call so that the call is established between B and C.

The transfer can be initiated at any of the following stages of the call between A and C:

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Immediately after A completes dialing C (transfer at call setup)

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While A hears a ringback (transfer from alert)

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While A speaks to C (transfer from active)