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Sip Jobs

34 were found based on your criteria

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Hourly - Est. Time: More than 6 months, 10-30 hrs/week - Posted
Develop extensions to Freeswitch and deploy for carrier grade systems. Must have experience with Freeswitch internals and application experience with Asterisk. Must have previous carrier grade deployment experience and understanding of the needs of production... more

Hourly - Est. Time: More than 6 months, 10-30 hrs/week - Posted
Develop integrate Sipwise, Kamailo and Asterisk to implement custom API. Launch to production and maintain. Assist in ongoing support enhancing API. Must have strong carrier grade deployment experience and be able to bring up from source test enhance... more

Hourly - Est. Time: More than 6 months, 10-30 hrs/week - Posted
Install Doubango Telepresence Server and develop custom API, and introduce into production and maintain. Must have strong experience in SIP and WebRTC technologies. Must have proven experience with Doubango Telepresence Server. Skilled at efficient bring... more

Fixed-Price - Est. Budget: $ 20 Posted
I am currently using freepbx that rings calls from "prospects" into a SIP client (3cx). My call center pre qualifies the call then transfers to an external line. The recipient of this call requires that the caller ID that is displayed be that of the... more

Fixed-Price - Est. Budget: $ 2,000 Posted
We are looking for skilled people who have proven experience with developing SIP VoIP Apps for both Android and iOS. For example an APP like Viber Only apply if you have developed one of these type of APPs before. The knowledge must be more than... more

Hourly - Est. Time: 1 to 3 months, Less than 10 hrs/week - Posted
I am looking for a skilled developer who has skills in the following areas: Vtiger CRM,Symfony,Codeigniter, Asterisk,VoIP,Elastix, and/or PBX. Please be experienced in developing many web applications including web site,Vicidial, Asterisk, FreePBX, vTiger... more

Hourly - Est. Time: 1 to 3 months, 30+ hrs/week - Posted
Hi, I am looking for a freelancer, or freelancers or a company who can build a CTI connector in Salesforce. The CTI connector needs to work in Internet Explorer or Chrome and provide RTP direct to the browser and utilise SIP. This CTI connector should... more

Fixed-Price - Est. Budget: $ 3,500 Posted
- App to make VoIP to VoIP calls - VoIP to local and international landline calls - Local and international landline calls to VoIP - Also PBX routing App to have user login, and comes with dashboard stating: - call destination number log - duration... more