Written by Aimee Bradshaw Reviewed by James Macey Updated on January 8, 2019 On this page Who Do They Provide Services To? What is IP? What Do ESI Provide? How Much do ESI Phone Systems Cost? Expand Estech Systems Inc (ESI) is a private, reputable Texan company who built the first combined telephone and voice mail system.Since starting out in 1987, the business has grown and now has many patents granted and pending especially within IP based communication products.ESI ReviewCategoriesRatingCustomer Service★★★★★Reliability★★★★★Features★★★★★Price★★★★★Summary★★★★★Reviewed by Expert Market:01/08/2019 Who Do They Provide Services To?Amongst its products, ESI provide telephone systems for businesses of any size whilst giving solutions and support for their varied clients including those in insurance, education, automotive industries, the legal, medical and financial sectors and many more.ESI also build private label versions of their products, for example, Comdial, Samsung and Code-a-Phone.Their products are used by many major companies in the USA including Coca-Cola, Hertz, Blockbuster Video, Hampton Inn and Best Buy. Eligible for Phone System Quotes? Click your state below to find out AK AL AR AZ CA CO CT DE FL GA HI IA ID IL IN KS KY LA MA MD ME MI MN MO MS MT NC ND NE NH NJ NM NV NY OH OK OR PA RI SC SD TN TX UT VA VT WA WI WV WY What is IP?ESI generally use their own developed IP products to provide comprehensive telephone systems.IP telephone systems work by using the internet or LAN to receive and make calls. This can vastly reduce costs by enabling the user to find companies offering cheaper rate calls than their current telephone service provider.IP phones come with an RJ-45 ethernet connector which plug directly into the router. ESI provide their own communication servers for their telephone systems which work as a traditional business phone, an IP phone or a combination of the two.ESI uses DSP digital signal processors to change voice data into digital data that can then be transmitted via the internet. DSPs are high powered semiconductors which manage these analog voice data functions. What Do ESI Provide?ESI's comprehensive website offers online support via e-mail or through their device and system help and support pages, leading browsers to downloadable pdf documents and full specifications of their products.The ESI communication server incorporates multiple phone system functions into one, and each system will provide help on how to use and program it alongside customize help features.Each phone system has many functions including voicemail, caller ID, call forwarding, call distribution and automated attendant, speaker phone and a dedicated help key. How Much do ESI Phone Systems Cost?For individual phone costs, the 12-key digital feature phone currently retails at $125, the 24-key is around $160 and the 48-key model is $200.The ESI 50L costs between $500 and $1000 with the following features:40 total stations (32 digital and 8 analog)16 central office lines56 call processing portsC4 voicemail ports with up to 15 storage hours16 conference portsTheir ESI 50 phone system has:52 total stations (12 IP, 32 digital and 8 analog)87 call processing ports16 conference ports35 central office linesThis model currently costs between $1000 and $1500s.For between $1500 and $2000 the ESI 100 phone system offers:148 stations (72 IP, 48 digital and 28 analog)42 central office lines108 call processing ports8 voicemail ports with up to 140 hours storage16 conference portsThe ESI 200 phone system, which currently costs $2500 incorporates many different features including:192 IP stations168 digital stations56 analog stations24 conference ports84 central office linesUp to 600 storage hours via 24 voicemail ports300 call processing portsFor around $3500, the ESI 600 phone system has:408 IP stations336 digital stations188 analog stations32 voicemail ports with up to 1,200 hours storage64 conference ports168 central office lines624 call processing portsThe ESI 1000 phone system costs approximately $4000 with the following features:810 IP stations504 digital stations384 analog stations128 voicemail ports with up to 1,200 hours storage64 conference calls1,128 call processing portsImportant: Pricing for these phone systems is for the base cabinets. Bundles and packages for telephones, memory, port cards, adapters and other applications are extra. What's next? Find out how the right phone system can benefit your business today. FIND OUT MORE Written by: Aimee Bradshaw Writer and researcher Aimee is Expert Market’s resident telephone systems and point of sale go-to. If she’s not writing about business products, you’ll find her daydreaming about dog walking on Dorset beaches. Reviewed by: James Macey Senior Business Software Researcher James thinks all businesses can improve if they use the right technology. At Expert Market, he utilises his 4+ years experience as a researcher to offer specialised advice on a wide range of categories from CRM to Fleet Management.