Ecom Instruments Ex-GSM 01 EU operating instructions

7.7.10 Re-establishing the factory settings

To re-establish certain menu settings to their original values, select Menu

>Settings > Re-establish factory settings. Enter the security code. The will ensure that the entered or downloaded data such as: the names and telephone numbers stored in the Address book are not deleted.

7.8 Push-to-talk

Push-to-talk (PTT) over the mobile wireless network is a two-way data service, which is available via a GSM/GPRS mobile wireless network. PTT enables direct voice communication. Connection setup is handled by pressing the PTT key.

Using PPT, you can conduct calls with one person or a group of persons who have compatible units. If the connection is established, the person or group does not need to additionally accept the call. The subscribers should confirm receipt where applicable, since there is no other type of confirmation as to whether the recipients have listened to the call.

You can obtain information about the availability and cost of this service from your network operator or provider, where you can also subscribe to this service. Roaming services may be more strictly limited than for normal calls.

Before using the PTT service, you must specify the required PTT service settings.

During a connection to the PTT service, you can continue to use the other functions of the telephone. PTT over the mobile wireless network is not dependent on traditional voice telephony. Because of this, many of the associated services (e.g. voice mailbox) are not available.

7.8.1Push-to-talk menu Select Menu > Push-to-talk

•To establish or break the connection to the PTT service, select Activate PTT or Deactivate PTT.

•To display the call back requests received, select call back inquiries.

•To display the list of PTT groups, select the group list.

•To display the list of dialog partners to whom you have added the PPT address received from the provider, select the list of calling parties [participants].

•To create a new PTT group on the telephone, select the group to add.

65