Voice over Internet Protocol or VoIP refers to a host of transmission technologies meant to deliver voice communications over IP networks that include packet switched networks and Internet. VoIP systems include communication services such as facsimile, voice, and voice messaging applications. A number of firms are shifting to this system to promote a cost effective medium of communication. You can hire an expert who can help your firm to leverage the potential of this new system. Just post a job today! Hire VoIP Developers

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    178 jobs found, pricing in USD

    Details will be shared winning bidder. please bid if you have the experience.

    $8 - $80
    Sealed
    $8 - $80
    6 bids

    Hello, I am searching developer has knowledge about sipdroid android library. You can check example or try run before bid. [url removed, login to view] i need someone use this library and build my voip/sip application. Please, if you dont have knowledge about sip and voip jobs then dont bid pls. Thanks,

    $152 (Avg Bid)
    $152 Avg Bid
    2 bids

    HTTP API is available via the [url removed, login to view] endpoint. Individual method names can be specified as a part of the url or by using the cmd=<method name> query string. Examples: [url removed, login to view]<method name> [url removed, login to view]<method name> Any HTTP verb can be used: GET, POST etc. Arguments can be url-encoded or body-encoded.

    $10 - $30
    $10 - $30
    0 bids

    HTTP API is available via the [url removed, login to view] endpoint. Individual method names can be specified as a part of the url or by using the cmd=<method name> query string. Examples: [url removed, login to view]<method name> [url removed, login to view]<method name> Any HTTP verb can be used: GET, POST etc. Arguments can be url-encoded or body-encoded.

    $25 (Avg Bid)
    $25 Avg Bid
    1 bids

    HTTP API is available via the [url removed, login to view] endpoint. Individual method names can be specified as a part of the url or by using the cmd=<method name> query string. Examples: [url removed, login to view]<method name> [url removed, login to view]<method name> Any HTTP verb can be used: GET, POST etc. Arguments can be url-encoded or body-encoded.

    $25 (Avg Bid)
    $25 Avg Bid
    1 bids
    CRM/Dialer copy for new user 5 days left
    VERIFIED

    Copy of an existing instance of Suite CRM and interface with our predictive dialer for other lead sources What we need is a 2nd exact copy of Suite CRM for use by another company we are partnering with. We need them to be able to purchase leads and their leads need to end up in a different Lead Bucket in OSDial. For more details please view the full Scope of Work document at [url removed, login to view] Please review that document BEFORE you request a chat session with us. We have several programming development projects we need accomplished. A full description of all of them is available at that link. All five projects are listed here on Freelancer as well. Thank you.

    $453 (Avg Bid)
    $453 Avg Bid
    3 bids
    asterisks expert 5 days left
    VERIFIED

    need someone with asterisks expertise who can use addon chan_mobile to connect my bluetooth phones to asterisks and transfer calls via them

    $155 (Avg Bid)
    $155 Avg Bid
    2 bids

    Read 5 messages I will send you with your voice.

    $28 (Avg Bid)
    $28 Avg Bid
    60 bids

    I am going to build big call center software. Please bid who has experience with call center software. It is web based project and it is large project for a long term. Don't bid who doesn't have experience with voip. You must know about call center software. thanks.

    $16109 (Avg Bid)
    $16109 Avg Bid
    33 bids
    Task for OpenSIP & A2Billing 4 days left
    VERIFIED

    Setup OpenSips Server to work with our A2billing platform. A2billing will handle Registrations and billing while OpenSIps handle calls

    $159 (Avg Bid)
    $159 Avg Bid
    6 bids

    I am trying to configure a mobile phone as a gsm gateway in asterisk pbx using chan_mobile. All setup is working fine. But only a problem in sound. sip caller cannot hear any sound from mobile. Sip>Asterisk>Bluetooth>Mobile=sound line is perfect. Mobile>Bluetooth>Asterisk>Sip=No sound. I think Problem in linux Bluetooth driver. But dont know how to fix. can you help me?

    $5 / hr (Avg Bid)
    $5 / hr Avg Bid
    4 bids

    i need someone who can use asterisk and use chan_mobile module to setup call termination from switch to asterisk and from asterisk to bluetooth mobile to transfer call... i need to connect multiple phones with single pc

    $216 (Avg Bid)
    $216 Avg Bid
    2 bids
    VOIP SERVER 4 days left
    VERIFIED

    Hello We want to setup a small Voip server with API to be connected on our CRM

    $167 (Avg Bid)
    $167 Avg Bid
    6 bids
    gsm gateway 4 days left
    VERIFIED

    i simply want to convert my android phone to behave as sip voip gsm gateway like GOIP, DINSTAR. android phone will register with my softswitch via 3g internet and when my softswitch will send call to android it will forward to gsm network. so it will work like DIALER(DIALS NUMBER)--> MY SOFTSWITCH --> ANDROID PHONE --> TO NUMBER DIALED BY DIALER.... This will be main future.. and it will work on codecs g711 g729 g723 I KNOW ITS NOT POSSIBLE IN ANDROID BUT MANY PEOPLES CONFIRMED THAT ITS POSSIBLE IN ANDROID WITH CHIPSET MTK6577. ____________________________________________________________________________________________________________________________________________ Other then this i want you to add some human behavior options.. 1) pause between calls (adjustable in settings). 2) Send and recieve calls to saved numbers automatically for adjustable time. 3) stop working if calls not connecting (like i set stop working if 20 calls not connect). 4) stop working if calls are very short duration (like i set if 20 calls of 10 seconds then stop). 5) it self bandwith optimization. some extra features needed 1) a web panel to see status of all androids 2) remote sending and recieving of ussd/sms by webpanel 3) making all settings via webpanel 4) settings intercalling via webpanel 5) checking cdr, calls connectivity, acd/asr via webpanel

    $1112 (Avg Bid)
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    11 bids
    bluetooth moile gsm gateway 4 days left
    VERIFIED

    i want to use mobile phones as gsm gateway we can connect mobile phones to computer via bluetooth and want to transfer sip trunk calls through mobiles like goip do.. if you can do it let me knw

    $140 (Avg Bid)
    $140 Avg Bid
    1 bids

    Need to add tokbox api audio and video calling into my messaging app for both ios and android, and cross platform, meaning ios device can make audio and video calls to android and vice versa

    $149 (Avg Bid)
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    22 bids

    I need someone who can install, modify and configure A2billing softswitch

    $374 (Avg Bid)
    $374 Avg Bid
    25 bids

    talk back broadcast control system sip terminal Asterisk

    $1286 (Avg Bid)
    $1286 Avg Bid
    13 bids

    I need an application that runs on Android phones (4.0 or above) and can send/receive calls through SIP (Can use any sip stack like sipdroid) and forward it to the GSM network. The application should then forward the audio and convert from SIP to GSM and vice versa. Full description below. Please review and message me with considerations. If any requirements are unable to be met, please let me know before we make a deal. Summary The goal of this project is to develop an Android application that can send calls through SIP and forward them to the GSM network AND receive calls from GSM and forward to SIP. The application should then forward the audio and convert from VoIP to GSM and vice vers General Deliveries The application working in APK format Full source code Simple manual for compiling and generating the application from source A SIP client running on another phone that connects to the server via WIFI and able to demonstrate the functionality in this project. Features - Route call from SIP to GSM - Route call from GSM to SIP (preconfigured SIP client) - Convert audio from/to SIP and GSM networks - Able to run on Android 4.0 and up. Application Configurations - Enable or disable the app - Enable to receive calls only on wifi or all networks - Enable to route calls from GSM to SIP (SIP address is configured through an API) - The number to send the call should be configured through an API that is supplied with the APP - Enable to route calls from SIP to GSM - Must run on background - Must be very lightweight to run on small memory devices - Configure SIP Accounts. Sip Requirements - Register on Sip Proxy/Gateway - Receive call authenticated by IP, user/pass or no authentication. - Make calls with or without authentication - Forward DTMF digits using RFC2833 or inband - Use codec G711 and GSM - Be able to use codec G729 - Receive through GSM one 1 simultaneous call and rout it to a predefined SIP client - Be able to store a CSV with all calls made Skills required: Android, VoIP

    $715 (Avg Bid)
    $715 Avg Bid
    15 bids

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