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About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024


    Kirt Blattenberger,


RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website:


Exodus Advanced Communications Best in Class RF Amplifier SSPAs

Telephone, PBX, and VoIP Systems
Manufacturers & Services

Even with cellphones dominating personal and business communications, there is still a huge need for wired systems, especially for in-building PBX applications. Your desk phone will likely still be around for a long, long time.

8x8 | 866-879-8647 | Sunnyvale, CA

Delivers business communications solutions including VoIP phone servicem managed hosting, web conferencing, and unified communications.

AccessDirect | 877-599-6500 | Kansas City, KS

Provides affordable hosted PBX services, business voice mail, and fax services.

AVAD Technologies | 800-733-4136 | New York, NY

Small business VoIP provider of Hosted VoIP PBX phone service.

Call Management Products | 800-245-9933 | Broomfield, CO

Manufactures high quality telecommunication products that are designed to enhance telephone line productivity and provide cost savings for your home or business.

Carroll Communications | 732-280-3200 | Spring Lake, NJ

Specializes in internet telephony, VoIP and office telephone systems.

ChronosTelecom LLC | 480-522-2114 | Scottsdale, AZ

Provides small businesses PBX appliances and phone systems.

Digium | 256-428-6000 | Waltham, MA

Creator, sponsor, and innovative force behind Asterisk, the world's most popular open source telephony software.

FacetCorp | 877-322-3846 | Dallas, TX

Maker of the FacetPhone IP PBX business phone system.

IPsmarx Technology | 800-532-4893 | Reston, VA

Provides feature rich VoIP solutions.

Jive Communications | 866-768-5429

Provides full-featured, affordable IP telephone systems to clients nationwide.

Nextiva | 800-983-4289 | Scottsdale, AZ

VoIP phone systems, virtual fax lines, business phone numbers, PBX trunk lines.

Phone Power | 888-607-6937 | Winnetka, CA

Provides residential and small business service packages, business and hosted PBX service packages.

PhoneSuite | 800-245-9933 | Broomfield, CO

Designs and manufactures high-quality telephone (PBX) systems for the hotel industry.

PBX Interactive, LLC | 888-895-PBXi | Brooklyn, NY

Specializes in business communication systems including, business telephone systems, virtual PBX systems (hosted | managed telephony), small office | home office (SoHo) telephone systems (digital and voip), voice and data cabling (Cat5e | Cat 6), virtual receptionists, virtual call centers and vanity toll free numbers for virtual offices and mobile office solutions.

PBX.NET | 866-446-8729 | Farmington Hills, MI

Provides hosted PBX & broadband VOIP telephone services for business.

Protus IP Solutions | 866-358-6366

Maker of my1voice, affordable virtual PBX phone aervice for small business.

TalkSwitch | 888-332-9322 | Canada

Makes award-winning telephone systems for small offices that handle VoIP and traditional connections with analog or IP phones and an ever-growing set of powerful features.

Virtual PBX | 888-825-0800 | San Jose, CA

Deliver PBX call routing and other functions as a hosted service, rather than a complex piece of hardware that you have to buy, install and maintain. Offers several versions of our Virtual PBX® Service, accommodating a wide range of needs, from a startup or SOHO PBX to large corporate telephone systems and also have a unique disaster recovery/business continuity phone service for companies that already have a PBX.

Vocalocity | 877-862-2562

Provides business VoIP & hosted PBX systems.

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