Ericsson R250 PRO User's Guide download pdf (Page 93)

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

TALK

button on

the left side of the phone, see “Overview” on page 4. When you finish talking

you release the

PUSH

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

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Ericsson R250 PRO User's Guide Page 93