Android voip dialer with build in encryption/tunnel

Required to make a android sip dialer with build in tunneling and encryption on a Linux based platform.

the platform must be able to handle 1000 concurrent calls

2 way calling out going and incomming

the dialer must be integrated to wok with asterisk and a2billing system

option for new account registration

save userid and password

option to reset forgotten password

refill credit via paypal

should be custom built and able to add additional features later.

should show customers current balance, call history etc...

highly secured against bruit force and other attacks

highly stable and reliable

below specs:

# VoIP calls with auto QoS using the SIP protocol standards (both incoming and outgoing calls)

# Android OS: [url removed, login to view] - and above

# Connection: GPRS, EDGE, WiFi, 3G, 4G (all above 15 kbits)

# Built-in tunneling and encryption (for both the signaling and the media)

# Codec: [url removed, login to view] (PCMU and PCMA), GSM, Speex, iLBC, [url removed, login to view] [url removed, login to view]

# Automatic fine-tuning (including codec selection) depending on your peer capabilities, network speed and CPU power

# AEC (acoustic echo canceller), Denoise filter, AGC (automatic gain control), PLC (packet loss concealment), Silence suppression

# System phone-book

# Call history

# Balance and rating display, call timer, status logs, detailed logs

# Multi-tasking support -listening for incoming calls in the background

# Speakerphone, Mute and Hold

# DTMF (RFC2833 or INFO method)

# NAT/Firewall support, stable SIP and RTP ports, auto QoS, light STUN protocol and auto configuration

# DNS SRV record lookups

# Logging support for trouble shooting

Skills: Android, Asterisk PBX, Linux, Software Architecture

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About the Employer:
( 16 reviews ) Abu Dhabi, United Arab Emirates

Project ID: #2382263

5 freelancers are bidding on average $1080 for this job


please check PM

$1150 USD in 25 days
(23 Reviews)

Hi, Please check your PIM.

$750 USD in 0 days
(3 Reviews)

I have that right here: [url removed, login to view] The format just needs to be changed to handle the proxies used by some internet service providers.

$1500 USD in 4 days
(0 Reviews)

Hello sir check PM for excellent start thanks

$1000 USD in 10 days
(0 Reviews)

We have expertise in building VOIP applications, either using native SIP stack or PJSIP

$1000 USD in 10 days
(0 Reviews)