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To make a secure call, you and the called party must have PrivateGSM software running on the mobile device, be connected to the Internet and to the same SIP PrivateServer server. |
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Calling by
contactContacts list
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As you can see in
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Presence
The Presence avoid users to call contacts who are not reachable, eg: because they do not have PrivateGSM activated and/or connected. The main value of this feature is to improve user experience suggesting the possible outcome of a call.
Contacts lists
- BASE: it lists all the contacts which are in the mobile address book, ordering them in the very same way.
- KNOWN: it shows only known contacts (registered or not) according to PrivateServer's knowledge. This means it is a list of the contacts that are recognised by the server and thus can have a status.
- FAVOURITES: it reads the contacts marked by you as "PrivateGSM favorites". It's a selection of contacts you choose to have apart, in order to make speed calls.
Contact status
 | Online | The contact is reachable. You can make a secure call to the user. |
 | Offline | The contact is not reachable, because is not under network coverage or is offline. You can try to make a secure call but the call will likely fail |
 | Warning | The contact is not reachable using a full secure call, but you can call him using the unsecure Sip Trunk configured on your server. |
 | Error | There is a comunication error between your phone and the server. The contact status is unknown, anyway you can try to make a secure call |
Calling by dialpad
You can make a secure call to any arbitrary number (presuming that the call peer has PrivateGSM connected) from PrivateGSM menu by simply entering the number with the on-screen keypad and pressing the dial (green) button.
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Call status
To establish a call PrivateGSM completes three phases shown by three icons:
Call status icons
| Red light | Starting the connection | Connection not yet established. This step may take several seconds |
| Green light | Secure call established | Connection established and secure. You can now speak securely |
Checking your security
A PrivateGSM call is always encrypted. The call is automatically secured during the call setup. As soon as the call is established you can immediately start to talk securely with your call peer.
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The security of the call is based on a digital certificate verification on the SIP/TLS server. If a certificate error appears check whether the date of your phone is correct. If the date is correct it is possible that the certificate is wrong, misconfigured or expired or that your phone is undergoing a security attack. In these cases always contact your system administrator. |
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History
Every event performed or received on your PrivateGSM is listed into the "Event logHistory" tab, which can be displayed by pressing "Recent" icon on the tab bar.
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By clicking on this icon you have access to event detail 's details (cfr
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Secure Messages
You can also communicate with your peers by text messages using the Private Message System (henceforth PMS). PMS provides Private Text Message (henceforth PTM) which does relay Secure Messages System which provides Secure Messages. A Secure Message is a text message that travels into the same encrypted architecture of the Secure Call.
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The maximum length of a single message is 160 character |
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Secure Messages rely on the very same security infrastructure the voice calls do.
PTMs are available as a subsidiary communication system which is a sort of voice expansion feature.
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Plus for security each Secure Message is blanked 15 minutes after it's been read or sent.
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Secure Message System need specific abilitation. If the service is not available on your device please contact your support team to check it's enabled on your account. |
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Sending Secure Messages from "History" tab
Secure Messages are available via "Recent" event log.
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| You cannot directly send a PTM to a contact of choice. It's necessary for you and the contact you want to write to to have had a previous call or a PTM exchange. |
Sending PTMs
History" tab, going into the detailed view:
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Using interface shown in
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Sending Secure Messages from "Contacts list" tab
Secure Messages are also available from "Contacts list" tab.
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You have to select an account from the list shown in
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Secure Messages status icons and known limitations
Each Secure Message is displayed with an icon showing its status. Most important icons are:
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 | Message Delivered |
 | Error sending Message |
There are few known limitations in the current Secure Message System:
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Actually it's not possible to use PMS Secure Messages in order to chat with multiple people (ie it's not possible to create chat rooms). |
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Please note that the body of each PTM Secure Message you send or receive will be deleted after 15 minutes you read or wrote it. |