Sip Jobs

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Hourly - Expert ($$$) - Est. Time: 3 to 6 months, 30+ hrs/week - Posted
We are looking for a strong software and app developer who have skill in developing VOIP and based based system . Who have in-depth knowledge in Android and iOS development with Agile management . Our core Project is to Built a Messanger apps with some strong VOIP functionality : 1. Secret Chat 2. Voip Calling service 3.And Integrated Store for Games and Stickers 4.Others - will discuss when we will interview . VOIP functionality should have a option to opt the Data pack and use the phone network to call while it has no data pack. We are looking very talented and long term basis developer . The project may consist of different part with different team members given by us : Like UI and UX as well the small steps and description design and various Graphics work . So it will be a complete team work . I need some one who can analysis the apps like : Telegram , Viber etc.
Skills: SIP Android App Development CSS Drupal
Fixed-Price - Expert ($$$) - Est. Budget: $1,000 - Posted
Looking for an expert to compile siphon ( or a sip client that really works with either kamailio + rtp proxy or freeswitch or asterisk ) with our company logo and skin.
Skills: SIP
Fixed-Price - Expert ($$$) - Est. Budget: $1,000 - Posted
Hi I have a high throughput and high load C program that is an open source project. I need help with modifying its internal data structure so it can be fully optimised, run in parallel, and utilize all cores of the server. You will need to be able to use Linux memory usage, gcc tuning tools, to find out the bottle neck and fix it in the code.
Skills: SIP C
Fixed-Price - Intermediate ($$) - Est. Budget: $300 - Posted
(Gateway between WebRTC client and switch/PSTN Gateway) When PSTN call is made from WebRTC client, it will connect to a WebRTC server for signalling. Further WebRTC server will send appropriate SIP signals to Asterisk using WS protocol. We will integrate JSSIP with WebRTC server so that proper sip signals can be generated and sent to Asterisk system. ... We will integrate JSSIP with WebRTC server so that proper sip signals can be generated and sent to Asterisk system. ... BB) Asterisk would need to transcode the opus codec to G729 No billing is required in WebRTC gateway. If required by asterisk, the sip ID and password will be available in database CC) incoming calls from switch or PSTN Gateway will be sent to WebRTC client.
Skills: SIP Asterisk WebRTC
Fixed-Price - Expert ($$$) - Est. Budget: $2,000 - Posted
For this feature we need a consultant who has experience in successfully setting up SIP or WebRTC based VOIP systems. The consultant also needs to guide the iOS and the Android development team on the client libraries to use to connect to the server (like SIPDroid C-SIP in Android and PJSIP in iOS or LinPhone on both platforms) The VOIP feature should work in all countries and between all combination of networks like the below (see PDF attached). ... The consultant also needs to guide the iOS and the Android development team on the client libraries to use to connect to the server (like SIPDroid C-SIP in Android and PJSIP in iOS or LinPhone on both platforms) The VOIP feature should work in all countries and between all combination of networks like the below (see PDF attached).
Skills: SIP VOIP Administration VOIP Software
Hourly - Intermediate ($$) - Est. Time: 1 to 3 months, 10-30 hrs/week - Posted
We are a looking for a VoIP expert with project management experience to lead our deployment of voice services in Vanuatu. Experience with SS7 necessary to enable with other local carriers. Project is partially complete, however we need to engage someone part-time based in a similar time zone to oversee the 2 engineers working on the project, align the tasks and dependencies, and provide guidance/technical advice when required. Platform being deployed is Elastix /A2Billing. 5-10 hours per week required for 1-2 months. Aiming for soft launch of phase 1 services by early June (international calls and on-net calls), with interconnection with local carriers to follow afterwards. Substantial progress has already been made in setting up the platforms and testing them, we primarily need project leadership for the remaining stages and assistance with troubleshooting.
Skills: SIP A2Billing Elastix VMware ESX Server