EWB100 Usage and Deployment Guide
Rev 1.13
Page 46
are the same, only the UDP ports are different, The base port can be
changed by a configuration command but will result in lack of
interoperability with Push-to-Talk Express clients.
There is a mechanism to resolve possible contention among sending
stations.
“Collisions” are resolved within 400ms and should not be noticed
by users.
There is an upper bound of 30 seconds on voice sessions. Sessions
longer than will be automatically terminated. The maximum duration may
be changed by a configuration command.
8.3
Alternative Channels
As noted above, normally an EWB100 is configured to transmit WT voice
streams on a single channel. This channel is defined by the Profile (see below).
A device is also programmed to listen on any number of channels, including the
one that it normally uses to transmit, using the channel map. The default transmit
channel and the monitored channels are both controlled by configuration
parameters.
As also noted above, an EWB100 that receives a packet on a channel that it is
monitoring (but is not the default transmit channel), will temporarily switch
transmit channels so that the user can reply to the message. This window is
typically 5-10 seconds (also a configuration parameter). After that time, the
device will switch back to its default transmit channel or home channel.
There is often a need for a device to switch to another channel in order to
communicate with a different set of users. This may be a one time event (i.e.
speak to everyone in the store rather than just those in my department) or it can
be a long lasting switch (perhaps I am switching departments for several hours).
This function can be done with Profiles (described below) but it can also be in a
less complex manner using the SAPP or FAPP buttons. The user may switch to
a different transmit channel by doing:
a single press of the SAPP button
a double press of the SAPP button
a single press of the FAPP button
a double press of the FAPP button
Each button sequence can specify a different alternative channel and audio clip.
Both are set via configuration commands on a per profile basis.
This feature is simple to use, simply perform the action, and then use the PTT
button to talk. The voice stream will go out on the alternative channel.
Summary of Contents for TEAM Badge (EWB100)
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