Ontus Germany AG United States

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Ontus Germany AG
Stresemannplatz 4
Duesseldorf
,40210
United States

Phone: +49-160-9685 9059
Site: http://www.ontus.com

Contact Person

David Hoffman / EVP - Business Development
Phone: +1 503-644-3133
Phone: +1 503-644-3133

International VoIP Wholesale Provider
Internet Telephony Service Provider
Hosted VoIP billing service provider
Voip Termination ISP
Hardware

IP devices
Termination
Billing Software
E1 Bulk Wholeseller
Partnering for Origination and Termination

Cisco Systems
Lucent
CPM

Billing system of own development

GSICallTermination

Alliance IP Networks, S.A

Providers in database: 6433

VoIP Favors SIP

Session Initiation Protocol (SIP) is a text-based standard put in place by the Internet Engineering Task Force (IETF) and is the primary protocol for Voice over Internet Protocol services. SIP is similar to a MGCP in that it's a signaling protocol that can create, maintain and terminate sessions in IP-based networks. These sessions include multimedia conferencing and two-way phone calls. SIP protocol can run on User Datagram Protocol (UDP), Stream Control Transmission Protocol (SCTP) and Transmission Control Protocol (TCP) because it was created to function independently from the underlying Transport Layer as an Application Layer.

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