Frequently you will not wish to handle
Call channels, but simply make a request
to the Channel
Dispatcher asking another client to place the call.
This can be done by requesting that the Channel Dispatcher create you
a channel (see Section 6.1 ― Requesting Channels) with the
properties given in Table 10-1.
The first three properties are common to most channel requests.
The InitialAudio channel indicates the
Connection Manager should immediately set up an audio channel (logically
required). The InitialVideo property indicates the
Connection Manager should also immediately set up a video channel.
Most protocols do not support video without audio. Although Telepathy
itself supports adding or removing video at any time during a call, some
protocols (notably Google Talk's version of Jingle)
do not support adding video to an existing audio call.
| Property |
Value |
| Channel.ChannelType |
Channel.Type.Call |
| Channel.TargetHandleType |
Handle_Type_Contact or
Handle_Type_Room
|
|
Channel.TargetID or
Channel.TargetHandle
|
e.g. escher@tuxedo.cat
|
| Channel.Type.Call.InitialAudio |
True |
| Channel.Type.Call.InitialVideo |
True or False
|
StreamedMedia
Making a request in this manner is also supported by the older
StreamedMedia interface:
| Property |
Value |
| Channel.ChannelType |
Channel.Type.StreamedMedia |
| Channel.TargetHandleType |
Handle_Type_Contact |
|
Channel.TargetID or
Channel.TargetHandle
|
e.g. eschiecat
|
|
Channel.Type.StreamedMedia.InitialAudio
|
True |
|
Channel.Type.StreamedMedia.InitialVideo
|
True or False
|
