Citel is The VoIP Migration Company™. We develop the world''s most comprehensive portfolio of network-edge products enabling enterprises to realize the cost and productivity benefits of IP telephony.
With Citel''s Portico™ TVA™, existing PBX handsets connect directly to a Session Initiation Protocol (SIP) based on-premise IP PBX or Hosted IP telephony service provider. Citel can help you determine which type of deployment strategy - Hosted or premise-based - is best for you and the needs of your enterprise.
Big Allo is a global provider of Internet telephony services.Using any of our products, you can place and receive calls through any Big Allo product via the Internet by using Voice over Internet Protocol (VoIP) technology. Through its cutting-edge solutio
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