1 ContactTel Canada

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1 ContactTel
Po 99 1iere avenue
Quebec
QC ,G3C2M2
Canada

Phone: 4182667325
Phone: 888-372-6501
Site: http://www.contacttel.com

Hosted VoIP billing service provider
International VoIP Wholesale Provider
Internet Telephony Service Provider
SIP Billing
VoIP Billing Software Provider
Voip consulting
Voip Termination ISP

Billing Software
Call Relay VoIP Solutions
Call Routing VoIP Solutions
Consultancy Services
E1 Bulk Wholeseller
Gatekeepering
Installation and Support Services
IP devices
Partnering for Origination and Termination
SIP Softswitch & CPE
SIP VoIP Gateway
System Integration
Termination

Cisco Systems

Proprietary

Distributel Communications Limited.

1 ContactTel

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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