User's Manual 358 Document #: LTRT-12809
Mediant 800 MSBR
Note: Only one call can be suspended per trunk. If another suspend request is
received from a BRI phone while there is already a suspended call (even if
done by another BRI phone connected to the same trunk), the device rejects
this suspend request.
28.4 Consultation Feature
The device's Consultation feature allows you to place one number on hold and make a
second call to another party.
After holding a call (by pressing hook-flash), the holding party hears a dial tone and
can then initiate a new call, which is called a Consultation call.
While hearing a dial tone, or when dialing to the new destination (before dialing is
complete), the user can retrieve the held call by pressing hook-flash.
The held call can’t be retrieved while ringback tone is heard.
After the Consultation call is connected, the user can toggle between the held and
active call by pressing the hook-flash key.
Note: The Consultation feature is applicable only to FXS interfaces.
28.5 Call Transfer
This section describes the device's support for call transfer types.
28.5.1 Consultation Call Transfer
The device supports Consultation Call Transfer using the SIP REFER message and
Replaces header. The common method to perform a consultation transfer is described in
the following example, which assumes three call parties:
Party C = transferred to
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 can perform the transfer by on-hooking the A phone.
6. After the transfer is complete, B and C parties are engaged in a call.
The transfer can be initiated at any of the following stages of the call between A and C:
Just after completing dialing C phone number - transfer from setup
While hearing ringback – transfer from alert
While speaking to C - transfer from active
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