oFono - Open Source Telephony ***************************** Purpose ======= The purpose of this document is to enumerate all major functionality areas of oFono. In effect, this document will serve as the primary, up to date source of oFono feature information. It is intended for developers, managers and users alike to quickly gauge the progress of the project and feature availability. Sim Toolkit =========== Supported Proactive Commands: - Display Text proactive command support. Upon receiving the proactive command notification oFono decodes it, including performing character conversion from packed/unpacked GSM 7bit and UCS2 to UTF-8 encoded text. The registered agent is then called using the DisplayText method on the SimToolkitAgent interface to handle the user interaction aspects. SIM-specified duration are handled. If immediate response to the SIM is required, oFono sends a terminal response immediately. DisplayText method is still executed normally, until a timeout occurs or a new proactive command arrives from the SIM. - Get Inkey proactive command support. When this command is received, oFono decodes it and checks what "flavor" it is. Depending on this, the SimToolkitAgent is called with a different method call: * If the Get Inkey flavor indicates that this is a simple Yes/No confirmation, then the RequestConfirmation method is called. * If the Get Inkey flavor indicates that the SIM only expects digits, then the RequestDigit method is called. * Otherwise the RequestKey method is called SIM specified durations are handled, if the user agent does not respond in the time allowed, then the 'No Response' Terminal Response is generated automatically. - Get Input proactive command support. When this command is received, oFono decodes it and checks what "flavor" it is. Depending on this, the SimToolkitAgent is called with a different method call: * If the Get Input flavor indicates that the SIM only expects digits, then the RequestDigits method is called. * Otherwise the RequestInput method is called - More Time proactive command support. This command is intended to notify that the SIM is still busy processing a command. For oFono, this proactive command is a no-op. It is always replied to successfully. - Setup Menu proactive command support. When this command is received, oFono parses the new main menu structure and updates its MainMenu and MainMenuTitle properties which reflect the items, icons and the alpha text of the proactive command. Soft key support and menu help system are ignored by oFono. - Select Item proactive command support. When this command is received, oFono decodes it and dispatches it to the SimToolkitAgent by calling the RequestSelection method. This method is passed the menu selection title, the selectable items and the default, if any. - Timer Management proactive command support. oFono supports starting, stopping and querying timer state flavors of this command. Up to eight timers are supported. This proactive command is handled completely inside oFono and no external user interaction is required. - Set Up Idle Mode Text proactive command support. Whenever oFono receives this proactive command, it updates the IdleText property on the main SimToolkit interface. Indications that this property has changed are handled by the usual means. - Send DTMF proactive command. Whenever oFono receives the Send DTMF command, it checks that there are calls in progress and DTMF is possible. If so, DTMF characters are passed to the voicecall atom to be transmitted to the modem. The appropriate terminal response is sent to the SIM once the DTMF tones have been played or the call has been disconnected. - Sim icon support. oFono supports icons that are stored on the SIM. If the SIM notifies oFono that an icon is available for a particular proactive command, oFono passes this information to the UI. The UI is able to obtain the icons by using GetIcon method on the SimManager interface. The icons are read from the SIM and converted into XPM format. - Text attribute support. Whenever oFono detects that text attributes have been given to any text or alpha string, it applies them and converts the resulting text to HTML. The UI is expected to be able to display such HTML formatted text. Envelopes: - Timer Expiration envelope support. Whenever a timer expires (as started by the Timer Management proactive command) oFono forwards, this envelope type to the SIM. No external user interaction is required. - Menu Selection envelope support. The user can initiate a proactive command session by selecting something from the Sim Toolkit main menu. This is done by using the SimToolkit's SelectItem method. As a result, oFono will send the Menu Selection envelope to the SIM. - CBS-PP Download envelope support. When oFono receives a cell broadcast and on a channel listed in EFcbmid, it is dispatched to the SIM using the CBS-PP Download envelope. No user interaction is required or signaled whenever this occurs. Short Messaging Service ======================= - Unique identifier for incoming and outgoing SMS messages. Whenever a message is received or sent by oFono, a unique ID is generated for that message. The id is relevant to all segments of an SMS and in the case of incoming messages is only generated when the SMS is fully assembled. The hash used is SHA1. This unique identifier is used to identify the SMS message to history plugins as well. - SMS Status Report support. oFono allows requesting of SMS Status Reports via the MessageManager UseDeliveryReports property. If enabled, oFono will set the SRR bit and process incoming status reports. oFono takes care of collating the status reports for multi-fragment messages. Once all status reports are received, the UI is notified either via DBus or history plugin API. GPRS ==== - GPRS suspension event support. The packet data service may be temporarily suspended while a circuit switched service such as voice call or SMS is active. SIM === - Fixed Dialing support. oFono reads the necessary bits from the SIM to check if FDN support is allocated and enabled in the SIM. If enabled, oFono halts the SIM initialization procedure and the modem remains in the PRESIM state. In this state oFono will only allow emergency calls. - Barred Dialing support. oFono reads the necessary bits from the SIM to check if BDN support is allocated and enabled in the SIM. If enabled, oFono halts the SIM initialization procedure and the modem remains in the PRESIM state. In this state oFono will only allow emergency calls.