sip - How do I make multiple concurrent VOIP calls from one PC? -

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i'm trying create program can manage devices in field phoning them , sending various dtmf tones. important requirement can have multiple calls happening in parallel, simultaneously playing different tones.

i using sflphone on linux, , have program can make useful call. can't find way of making second call in parallel -- first call gets put on hold.

does know of libraries, software, hacks etc make happen?

you can use pjsua softphone, open-source , allows multiple calls: http://www.pjsip.org/


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