Nortel VoIP Gateway, Configuration Manual

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Norstar VoIP Gateway Configuration Guide
Appendix H
Working with H.450 supplementary services
The VoIP Gateway supports the following supplementary services:
• Hold\Retrieve (H.450.4)
• Consultation\Alternate
• Transfer (H.450.2)
• Call forward (H.450.3)
To activate supplementary services on the VoIP Gateway you should enable Hold, Transfer and
Forward services either from the web interface or the INI file. To use these features, all IP
Telephony gateways participating, in the call, must support the H.450.1-4 standards.
Call Hold and Retrieve features
The active call can be put on Hold by pressing phone's hook-flash button. The party that initiates
the hold is called the holding party. The other party is called the held party. After a successful hold,
the held party should hear HELD_TONE and the holding party should hear DIAL_TONE.
A retrieve can be performed only by the holding party while the call is held and active. The
holding party performs the retrieve by pressing the hook flash. After a successful retrieve the voice
should be connected again.
Consultation\Alternate feature
The consultation feature is relevant only for the holding party.
After holding a call (by pressing hook flash) the holding party hears dial tone and may now initiate
a new call which is called a consultation call. At the stage of hearing dial tone or dialing to the new
destination (before completing the dialing) the user may retrieve the held call by pressing the hook
flash.The held call can't be retrieved while hearing ring back tone.
After the consultation call is connected, the user may switch between the held and active call by
pressing the hook flash.
Note:
Do not use H.450 supplementary services in networks that contain other Nortel
Networks endpoints such as Business Communications Manager and Meridian1 IPT. The
H.450 supplementary services are not supported on these devices.
Note:
The H.450 supplementary services are features available on the VoIP trunks.
Enabling and disabling these features has no effect on the similarly named Norstar
features.