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Check out a sample of the 30 SIP jobs posted on Upwork

Hosted VoIP Engineer for Migration Hourly ‐ Posted 1 month ago

30+ hrs/week
Hours needed

3 to 6 months
Duration

Intermediate
Experience level

We are looking for someone to help migrate from Ring Central to Dial Pad (both hosted voice solutions) for approximately 270 locations.…

SIP Session Initiation Protocol VoIP Software VoIP Administration VoIP
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Less than 30 hrs/week
Hours needed

1 to 3 months
Duration

Intermediate
Experience level

We are seeking a knowledgeable telecom professional with expertise in SIP trunks and Direct Inward Dialing (DID) systems, specifically…

SIP VoIP Software Asterisk VoIP Administration Session Initiation Protocol VoIP
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Less than 30 hrs/week
Hours needed

1 to 3 months
Duration

Intermediate
Experience level

We are seeking a skilled Twilio expert with extensive knowledge of VOIP and SIP systems. The ideal candidate will help us integrate Twi…

SIP Session Initiation Protocol VoIP Software Twilio API VoIP Administration VoIP
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$100
Fixed-price

Intermediate
Experience level

We are seeking an experienced consultant to guide us on setting up SIP trunking between Twilio and Yealink IP phones. Your expertise wi…

SIP VoIP Software VoIP Administration Twilio API Session Initiation Protocol VoIP
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VoIP, SIP, MSP, Telecom, AWS Customer Support Fixed-price ‐ Posted 14 days ago

$50
Fixed-price

Intermediate
Experience level

I am looking for something that can help with MSP, VoIP, and IT consulting support as a tech person. Virtual support. The person needs…

SIP Session Initiation Protocol Technical Support 3CX VoIP Administration VoIP
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Less than 30 hrs/week
Hours needed

1 to 3 months
Duration

Intermediate
Experience level

We are seeking an experienced developer to design and implement a telephony infrastructure that supports VoIP, IVR, and Call Recording…

SIP Session Initiation Protocol Asterisk VoIP Administration VoIP Software VoIP
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SIP/WebRTC Two-way audio needed-VoIP, C#. Hourly ‐ Posted 1 month ago

Less than 30 hrs/week
Hours needed

Less than 1 month
Duration

Expert
Experience level

Needing an expert in SIP and WebRTC to solve the problem we are having with two-way audio. I have a C# console application called SIPTo…

SIP Session Initiation Protocol VoIP WebRTC C#
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Building SIP Proxy to alter SIP messagez Hourly ‐ Posted 19 days ago

Less than 30 hrs/week
Hours needed

Less than 1 month
Duration

Intermediate
Experience level

See Visio graphs. Our system, PortaSIP, sends and receives calls. We have a vendor, that sends and receives calls. We need a proxy, so…

SIP Linux VoIP Administration FreeSWITCH FreePBX Session Initiation Protocol VoIP Software VoIP Kamailio OpenSIPS Asterisk
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Building SIP Proxy to alter SIP messages Hourly ‐ Posted 17 days ago

Less than 30 hrs/week
Hours needed

Less than 1 month
Duration

Intermediate
Experience level

See Visio graphs. Our system, PortaSIP, sends and receives calls. We have a vendor, that sends and receives calls. We need a proxy, so…

SIP Linux VoIP Administration FreeSWITCH FreePBX Session Initiation Protocol VoIP Software VoIP Kamailio OpenSIPS Asterisk
See more

30+ hrs/week
Hours needed

More than 6 months
Duration

Expert
Experience level

We need an Asterisk and ViciDial expert to work live with our engineer to troubleshoot and properly configure SIP extensions for use wi…

SIP VoIP Administration VICIDIAL Session Initiation Protocol VoIP Asterisk
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