90 GSM Pro
GSM Pro
Note! The features described in this chapter require a special subscription
that supports GSM Pro. For more information about GSM Pro, please contact
your network operator. Some network operators may choose to use a different
name for GSM Pro. For more information about GSM Pro, please see this
location on the web: http://www.ericsson.se/gsmpro.
The R250s PRO is the first mobile phone which supports GSM Pro. GSM Pro
is an extended feature of the GSM network which gives the user access to
most of the functions found today in various Private Mobile Radio (PMR) and
Public Access Mobile Radio (PAMR) networks.
With a R250s PRO and a GSM Pro subscription you get access to all the regu-
lar GSM network services and most PMR and PAMR services, such as group
calls, call monitoring and alert calls.
Group calls allows all members of a specified group to be reached with a sin-
gle call. With a GSM Pro subscription, group calls are now available on the
GSM network.
In a group call, all participants can listen to and talk to each other. The group
call features and the Push-To-Talk mode give GSM Pro a walkie-talkie-like
function, that is a key feature for PMR and PAMR users.
A group number is a special number that makes it possible to call all group
members at the same time with a single call.
Push-To-Talk Mode
Group calls are preferably made and received in “Push-To-Talk mode”,
although group calls can be made and received in phone mode.
When you want to speak you press and hold the
PUSH
-
TO
-
TALK
button on
the left side of the phone, see “Overview” on page 4. When you finish talking
you release the
PUSH
-
TO
-
TALK
button, to let other group members speak.
When you release the Push-To-Talk button the microphone is muted. This is to
avoid disturbing background noise during a call.
GROUP CALLS
