Features

An overview of the implemented standards is available here. Available features may vary depending on OS type and version.

General

• Simple use, your parents are able to use it
• Multiple SIP accounts
• iCloud account syncing between multiple computers
• Keychain support for encrypted password storage
• Built-in SIP account sign-up at http://sip2sip.info
• Handle TEL and SIP URLs clicked in other applications
• Voice Over accessibility support

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Contacts Management

• Integrates System Address Book
• Server Storage (XCAP protocol)
• Directory search (LDAP protocol)
• Bonjour neighbours (MDNS protocol)
• Automatic backups

Audio Sessions

• Wideband: Opus and G722 codecs
• Narrowband: G711 and GSM codecs
• Answering machine
• DTMF support
• Silent mode
• Call: recording, transfer, waiting
• Mute microphone
• Message Waiting Indicator (MWI)
• ICE NAT traversal
• Web page integration with caller information
• Displays RTP end-point information
• Displays codec, packet loss and RTT
• Telephone dialpad
• End-to-end encryption zRTP encryption

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Multiparty Conferencing

Blink can conference audio calls locally. For more media types and advanced conferencing features, a conference server is required. Blink supports the following server side conferencing features:

• Wideband Audio (using Opus codec)
• Conference Information (conference-info event package)
• Add/remove Participants (out-of-dialog REFER method)
• Instant Messaging (MSRP chatroom support)
• File Transfers (MSRP file transfer support)
• Screen Sharing (JPEG streaming over MSRP)

Changelog for Blink (Windows)

Version 3.2.0

February 27th, 2019

• Updated TLS certificates
• Updated copyright years

Version 3.1.0

October 6th, 2018

• Updated software license to GPL-3+ without restrictions
• Extended the cases for which we fetch the alternate icon
• Fixed displaying the owner of a failed icon retrieval
• Use newer syntax when catching exceptions
• Fixed Google contacts for another API breakage on Google’s side
• Fixed google contacts file cache being unavailable with newer ouath2client
• Added unicode representation for AudioSessionItem to improve accessibility
• Depend on python-application 2.5.0
• Updated copyright years

Version 3.0.3

February 28th, 2017

• Fixed another People API breakage by Google (they restored old behaviour)
• Added minimum version dependency for python-googleapi

Version 3.0.2

February 9th, 2017

• Fixed people API breakage on Google’s side
• Updated software description
• Updated copyright years

Version 3.0.1

December 19th 2016

Depend on python-sipsimple 3.1.0

Version 3.0.0

December 16th, 2016

• Switched to Qt5
• Added call transfer
• Fixed Google Contacts
• Many UI tweaks and improvements

Version 1.4.2

September 11th, 2015

Fixed default URI after processing Google contact updates

Version 1.4.1

Fixed opening files in binary mode

Version 1.4.0

• Added support for VP8 video codec
• Added file transfer resuming capability
• Added basic support for RTCP PLI feedback indication and use it to send / request keyframes
• Fixed crash when handling bogus Opus packets

Version 1.2.1

March 24th, 2015

• Added Video support
• Added ZRTP support
• Added support for file drag and drop on the chat window
• Improve the performance of painting the video preview
• Fix stopping composing timer when session is ended or chat is removed
• Removed unused settings
• Always play an audio alert when a file transfer finishes
• Removed session and RTP timeouts from preferences
• Reorganized preferences
• Better icons for chat, logging and advanced settings
• Updated test numbers
• Check for the audio session item existance before operating on it
• Ignore hold/hangup keyboard shortcuts if no session is selected
• Render status messages appropriately
• Optimized chat inline images to avoid compression artifact

Version 0.9.1.2

Fix version number

Version 0.9.1.1

Fix installer not removing old files from destination folder

Version 0.9.1

• Automatically transform URLs in the chat window into clickable links
• Show P2P icon if contact is a Bonjour neighbour
• Fixed handling unicode in user’s home directory
• Fixed http URL regular expression
• Removed menu entry for buying prepaid credit
• Fixed encoding of cut text for the VNC client
• Rebuilt Blink and its dependencies using MinGW toolchain

Version 0.9.0

• Fix Blink not starting on Windows 7 and 8
• Added screen sharing support
• Refactored session info panel
• UI Layout fixes
• Added file transfer to the list of client capabilities
• Fixed status message when audio is removed vs when the session is ended
• Fixed exception when trying to change status after audio session is gone
• The file transfer download directory cannot be undefined
• Raised python-sipsimple version dependency

Version 0.8.2

• Fix corrupted incoming file transfers
• Use a generic fail reason when none is provided
• Add support for adding/removing multiple streams at once
• Refactored SDP handling
• Send re-INVITE after ICE negotiation is done
• Enable RTP keep-alive using empty RTP packets
• Disabled speex codec by default
• Fixed race condition when saving ICE state
• Fix closing media transport to avoid leaking STUN sockets
• Use a shorter timeout for re-INVITEs that need to be answered without user interaction

Version 0.8.1

April 24th, 2014

• Fixed issue with not fetching Google Contacts after recent Google changes
• Changed audio codec order: prefer G722 over Speex

Version 0.8.0

April 11th, 2014

• Added file transfer support using MSRP protocol
• Added chat themes support
• Added chat preferences
• Added quick setting for playing message alerts
• Added keyboard shortcuts for different windows
• Added option for auto-accepting chat from known contacts
• Rearranged menus in the main window
• Refactored history menu
• Improved displaying the account states in preferences and the main window
• Save conference rooms in combobox history and limit it to 20 entries
• Fixed unwanted selection switching when sessions were ended
• Fixed using correct avatar and display name for received chat messages
• Fixed updating toolbar buttons when changing sessions and allow hold early
• Fixed using secondary ringtone when adding chat to an audio session
• Fixed playing hold tone when switching sessions
• Fixed playing tones when streams are cancelled
• Fixed incoming dialog margins
• Fixed processing DTMF tones
• Close dialog if session is ended while in a proposal
• Only remove the TLS certificate if it’s in the application data directory
• Play sound for received chat messages, if enabled
• Do not play the hangup tone for sessions without audio
• Do not close all windows when closing the main window

Version 0.7.0

• Added session information panel into the chat window
• Added server side conferencing support
• Automatically accept in-dialog chat proposals
• Fixed potentially processing multiple settings changes at once
• Enabled showing logs directory
• Limit the time window for processing a DNS lookup to the current session
• Tons of UI tweaks

Version 0.6.0

December 16th, 2013

• Added chat sessions using MSRP protocol
• Added Opus codec version 1.1
• Fixed Opus codec negotiations bugs
• Fixed unpickling for Bonjour Neighbours
• Use single global c line when creating SDP
• Fixed several memory leaks
• Simplified processing Google contacts authorization and fixed some bugs
• Set focus to the appropriate widgets during Google contacts authorization
• Improved selection of the winning presence state
• Removed donate menu action
• Properly patch dnspython to make it non- blocking
• Adjusted to the latest changes in SIP SIMPLE Client SDK

Version 0.5.0

August 9th, 2013

• Adapted to changes in SIP SIMPLE Client SDK
• Enabled Opus codec
• Set default sample rate to 32 kHz
• Fixed exception if Google contact has no name nor company
• Fixed losing contact icons
• Fixed computing hours in history entries
• Fixed setting display name in history entry when URI is a phone number
• Avoid publishing presence state twice when xcap settings change
• Allow Ctrl+Delete/Backspace to hangup sessions because KDE steals Ctrl+Esc
• Raise and activate preferences window when triggered if already visible
• Do not allow toolbar to be hidden

Version 0.4.0

• Added support for multiple URIs per contact
• Added support for Bonjour presence
• Added minimize to system tray
• Added text eliding using fading colors for labels with long texts
• Adjusted selected group background colors for better visibility
• Save and restore main window geometry across restarts
• Move contact when its name changes to keep contacts sorted
• Updated test contact icon files
• Strip URI domain in history if URI looks like a phone number
• Fixed creating offset-naive datetime for epoch
• Fixed processing when initial winfo document is not full
• Fixed publishing internal presence states
• Fixed losing presence state when contact is modified

Version 0.3.1

April 25th, 2013

• Fixed contact drag and drop
• Fixed handling PIDFs from multiple accounts at once

Version 0.3.0

• Added support for SIP PUBLISH method
• Added subscriptions for presence (presence event package)
• Added handler for outgoing presence (RLS SUBSCRIBE and RLMI NOTIFY)
• Added handler for incoming presence (presence.winfo event package)
• Added support for presence payloads (PIDF, RPIDF, CAPS and CIPID schemas)
• Added XCAP client capabilities
• Added XCAP server query capabilities (xcap-caps)
• Added XCAP contacts storage (resource-lists and rls-services)
• Added XCAP contacts synchronization between multiple instances (xcap-diff)
• Added XCAP presence policy (OMA org.openmobilealliance.pres-rules)
• Added XCAP storage for User Icon (OMA org.openmobilealliance.pres-content)
• Added call history menu (Missed, Received, Placed)
• Disabled curently unused menu entries and preference options
• Bug fixes inherited from SIP SIMPLE client SDK
• Set audio sRTP to be optional by default

Version 0.2.10

September 20th, 2012

• Added GRUU support (RFC 5627)
• Fixed handling stream hold edge cases
• Fixed crash when bogus G722 payload is received
• Fixed crash on SDP version overflow
• Fixed engine failure on bogus incoming REFER requests
• Fixed crash on RTCP decryption when using SRTP
• Updated Python to version 2.7.3
• Updated PyQt to version 4.9.4
• Enable TLS and SRTP labels when appropriate

Version 0.2.7

• Improved interoperability with OnSIP service
• Fixed duplicate account detection
• No longer decode display_name as it’s unicode now
• Adapted to the latest API changes in middleware
• Fixed string representation of SIP URIs with special characters (SIP Simple)
• Fixed SDP negotiation on bogus answers (SIP Simple)
• Reduced SDP size when streams are disabled (SIP Simple)

Version 0.2.6

March 22nd, 2011

• Fixed exception when NAT type detection is attempted without connectivity (SIP Client)
• Fixed exceptions when contact URI can’t be built for the desired route (SIP Client)
• Fixed crashes and increased resilience when connectivity is lost (SIP Client)
• Relax check on SDP origin to increase interoperability (SIP Client)

Version 0.2.5

February 16th, 2011

Fixed saving TLS options (SIP Simple)

Version 0.2.4

February 15th, 2011

• Added support for unicode device names
• Added menu entry and dialog for joining a conference
• Restructured main menu
• Improved DNS resolver capabilities (SIP Simple)
• Only handle records in the local. domain for bonjour (SIP Simple)
• Send 500 response if we fail to create incoming invitation (SIP Simple)
• Fixed race conditions in subscription handlers (SIP Simple)
• Fixed exception when the session is ended on error conditions (SIP Simple)

Version 0.2.3

December 14th, 2010

• Detect change of IP address
• Added web server tools activity indicator
• Fixed compatibility with older python-qt
• Made changes to Preferences thread safe (SIP Simple)
• Fixed TLS transport initialization (SIP Simple)
• Added DNS resolver autodetection capabilities (SIP Simple)
• Fixed matching of media codecs on incoming calls (SIP Simple)

Version 0.2.2

November 29th, 2010

• Fixed detection of audio codecs without a rtpmap line in SDP
• Fixed exception for MWI NOTIFY without a Message-Account body

Version 0.2.1

November 26th, 2010

• Allow name and group attributes to be missing when updating a contact
• Handle bonjour neighbour record updates
• Updated debian dependency on python-sipsimple
• Honor the account.sip.always_use_my_proxy setting
• Fixed opening the create account dialog on first run

Version 0.2.0

November 11h, 2010

• First Blink QT official release for MS Windows
• Added the preferences panel
• Enable inband DTMF by default
• Disable ICE by default
• Simplified MWI code and improved its user interface
• Improve handling of Google contacts
• Open the dialog for adding the initial account after the main window
• Switch to new plugged-in device automatically if we have active calls
• Added transparency for contact icons
• Added conference contact on first start
• Many bug fixes in the middleware
• Adapted to the latest changes in SIP SIMPLE client SDK

Version 0.1.4

September 6th, 2010

• Save preferred media when creating a contact
• Fixed broken dependency to python-aplication for non-Debian systems
• Display ‘no new messages’ text before getting MWI NOTIFY

Version 0.1.3

September 3rd, 2010

• Added support for inband DTMF dialing
• Improved logic for matching contacts to incoming sessions
• Added pstn prefix setting
• Fixed enabling Bonjour account item in the menu
• Added initial MWI support