VoIP

Based on my ongoing experience with Internet telephony alternatives to landline or PSTN (Public Switched Telephone Network). Currently, my primary providers are CenturyLink for Internet access and landline/fax via PSTN and Junction Network's OnSIP for VoIP communications. In my opinion, Centurylink's landline/fax service is an unnecessary business expense made more onerous by taxes and other charges, which I'm kinda stuck with because of the extended contract terms. OnSIP is month-to-month and has been an extremely reliable voice-over-Internet phone service (even in certain circumstances with limited bandwith).
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Bria by CounterPath SIP/VoIP client for Windows or Mac computers as well as iPhones and iPads Bria Bria softphones on Mac computers and Bria apps on iPhones and iPads used as SIP/VoIP clients for OnSIP service (below); viable alternative to phone hardware for VoIP communications. Used since 2009. 
Gigaset DX800A High Definition, dual-mode VoIP/landline desktop phone/base station with integrated answering machine, contacts and other features Gigaset DX800A Current desktop phone base station at the office. Pro: Recommended as single phone system to handle both VoIP and landline calls; versatile features such as Bluetooth® headset connection for hands-free use. Cons: Some static on landline signal cured by plugging cord adapter into headset. Used since 2013. 
Gigaset S675 IP High Definition, dual-mode VoIP/landline system with integrated answering machine, contacts and other features; Gigaset S67H is the handset included Gigaset S675 IP Replaced by Gigaset DX800A at the office; currently used as home phone system, which includes an extension of the business VoIP service. Pro: Good VoIP phone. Con: Some static on landline signal; scrambled voice message entry occurs every month or so requiring reconfiguration of phone system; date playback on answering machine is based on European date format. Sum: Good looking and performing hardware. Used since 2009. 
Gigaset SL78H DECT handset works with Gigaset DX800A or Gigaset S675 IP Gigaset SL78H Pros: Metal frame. Bluetooth® headset connection for hands-free use. Color display shows both external caller's source or number and internal number or line for each call. Used since 2009. 
iSip SIP/VoIP app for iPhone iSIP app for iPhone Pros: SIP/VoIP calling on iPhone when Internet access available. Multiple SIP accounts configurable. Cons: Call quality okay but not as good as using mobile phone service or SIP/VoIP service using VoIP phones or softphone on computer. Used briefly before Bria. 
Junction Network's OnSIP Virtual/hosted business VoIP (Voice over Internet Provider), auto attendant menu, extension dialing, remote office capabilities, HD voice capable. OnSIP Pros: 30-day free trial. Month-to-month. More reliable than other services formerly used. Domestic calls: 2.9¢/min. Only international calling experience (from Armenia) was satisfactory. Cons: 2.9¢/min. Comparable features/packages are more expensive than other services used. Sum: OnSIP is a reliable, SOHO business class provider. May be a better overall value than other providers used despite slightly higher cost. Used since 2009. 
Snom m3 Mobile, multi-line IP DECT phone system for SIP/VoIP telephony service only Snom m3 Sum: Good SIP/VoIP-only phone overshadowed and replaced by newer, more versatile Gigaset phones. Used 2009-2013. 
Vendors, obsolete I have used the following communications services or products, which are no longer available: Gizmo5, Google Voice, and Sipgate.   
Showing 8 items