Asterisk Set Up for Android

I am looking for a person or company who sets up Asterisk for a Video Calls between Android phones and windows descktop clients.I see it as 4 modules 1. SIP/PBX Gateway ( Web Admin page that controls this ) 2. Call Centre Web Module to allow them to oversee/or answer inbound alarms etc 3. Android Mobile Client 4. Web Client (to allow say doctors or 3rd parties to be able to access system) Overview: - Development and operational integration of an Android and Web Browser based video conferencing solution - Solution will be hosted by the client - Mobile Android handset video and sip handset application, Web based version, and a Call Centre Portal to allow oversight and interaction of calls. - Server Side PABX/application to centrally control users, features and services delivered to mobile/web clients - Integration of Server Side PABX/application (SIP Gateway) to Avaya IP Office to handle routing of calls to public telco network if required - Encryption of calls to ensure security - Ability to open the mobile application to receive and send calls from other application to tie into existing applications developed - Ability to open the server side application to users and registrations can be integrated from other web based applications - Delivery of end solution to handover so further development can be continue in house by client development team - Video/Sip and similar standard feature set that would be expected (See references) Server Side Key Features: - Serverside PABX/SIP Gateway that controls and handles calls and video conferencing (hosted at client) - Ability to Integrate the SIP Gateway to an inhouse Avaya IP Office Pabx to integrate extension dialling, and Voice Network hop off - Require to record SIP & voice calls across the system for compliance and search/export them (Accessible from Call Centre and Admin Portal) - Automatic bandwidth control, adaptive to actual network conditions for calls - Adaptive low-latency packet-loss recovery - Ability to allow Call Centre override for inbound call to the mobile client, i.e. auto answer (in voice or video if enabled on the user profile) Mobile/Web Client side Key Features: - Mobile Video and SIP GUI for handling the call/conference (however the dialling and answering will be done via a 3rd party application) - Mobile Client has to be able to allow a 3rd party application to tell it to make a call - Mobile Client has to be able to broadcast a inbound call ringing to allow the 3rd party application and control the auto answer - Automatic "quality vs. CPU load" dynamic adjustment - All functionality/configuration to be able to be controlled from server side profile settings - Web Client would be based upon user login/registration from central system, and access to a pre determine directory. - Web Client would be able to video & Sip call/conference, or receive/answer inbound calls/conferences References to other products that provide some of the functionality - but not all: [login to view URL] [login to view URL] [login to view URL] [login to view URL]