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Disclaimer
This disclaimer applies to every page of VoIP Cost Guide and should be read with our terms of use.
Educational information only
VoIP Cost Guide publishes educational information about voice over IP technology, troubleshooting and pricing models. Content is written from published standards (including IETF RFCs and ITU-T recommendations) and general professional practice. It is not engineering advice directed at your particular network, phone system or contract, and reading a guide here does not create any professional relationship between you and the site or its contributors.
Emergency calling warning
Telephone configuration can affect the ability to reach emergency services and the location information delivered with those calls. Nothing on this site should be used as the sole basis for configuring, moving or testing E911 service. If your changes could affect emergency calling in any way, involve your VoIP provider or a qualified engineer and follow applicable FCC and local requirements.
Pricing information
Cost guides explain pricing models and work examples using clearly labeled sample rates. Sample rates are illustrations, not quotations, offers or representations of any provider's current pricing. Actual prices, taxes, regulatory fees and surcharges vary by provider, contract, location and date, and are set by the provider and the authorities concerned. Obtain current written quotes before making purchasing decisions. Worked examples in our budget series use one consistent set of labeled sample rates so pages can be compared with each other; those rates are teaching devices chosen to be plausible, not a representation that any provider offers them today, and your market, contract term and negotiation will move every line.
Your responsibilities when you act on a guide
Telephony systems differ in vendor, version and configuration, and a procedure that is correct for one environment can be wrong for another. Before changing a production phone system, back up its configuration, work in a maintenance window where the change could disrupt service, and verify emergency calling still behaves correctly afterwards. If a guide's steps and your system's behavior disagree, stop and treat the disagreement as information: your environment has a fact the guide does not, and a qualified engineer or your provider's support is the right next step. You are responsible for changes you make to your systems; the guides are a knowledge resource, not an instruction set guaranteed for any particular installation.
No professional relationship; jurisdiction notes
Reading this site, using its contact form, or following its guides does not make the site's contributors your engineer, consultant, attorney or accountant, and no duty of care arising from such a relationship should be inferred. Regulatory material here is centered on United States federal rules (FCC) and widely applicable standards; telecommunications taxes, 911 funding and consent-to-record laws vary by state and country, and nothing here is a statement of the law or practice of any particular jurisdiction other than as expressly sourced.
No endorsements; no compensation
References to providers, carriers, standards bodies, products or services are for explanation only and do not constitute endorsement. This site does not accept payment, commissions or other compensation for mentioning, ranking or reviewing any provider or product.
External links
Links to third-party documents and websites are provided for reference. We do not control and are not responsible for their content, accuracy or availability, and a link is not an endorsement of the destination.
Limitation
You use this site and its content at your own risk. To the fullest extent permitted by law, we disclaim liability for losses arising from reliance on content here, including service interruptions or misconfiguration of your systems. If any part of this disclaimer is held unenforceable, the remainder continues in effect.