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Asterisk  

27
Open-source modular communication system
Asterisk is an open-source framework that helps to build communication applications and is used by small, midsize and large companies and governments worldwide. Read more about Asterisk
Open-source modular communication system
Asterisk is an open-source framework that helps to build communication applications and is used by small, midsize and large companies and governments worldwide. Read more about Asterisk

Zadarma  

23
VoIP calls, Cloud PBX and SMS solutions for business users
A new generation of VoIP for your business, offering virtual phone numbers, cloud PBX and much more. Save up to 90% on phone bills! Read more about Zadarma
VoIP calls, Cloud PBX and SMS solutions for business users
A new generation of VoIP for your business, offering virtual phone numbers, cloud PBX and much more. Save up to 90% on phone bills! Read more about Zadarma
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