Dubuque  563-213-5784 

ESI Business IP telephone systems; ESI IP telephone systems; ESI Unified Communications ESI Cloud based hosted telephone service

Your existing digital phones are powered by the common equipment of the phone system via a dedicated voice cable from each phone to the system. 


An IP solution utilizes your Local Area Network (LAN) to power IP phones and connect them to the IP phone system.  This means that a Cat5E or Cat6 data connection will be needed at each phone location to support an IP telephone.


Existing data connections (cable and jack) that support a PC on the network provide such cabling and can be shared for phone use as well.  Each IP phone has a Gigabit ‘pass through’ connection built in to it.  This pass-through is a dual data connection built in to the back of the phone in which one jack supports the phone, while the other serves to pass through the full bandwidth of your Gigabit network for use by the PC.


IP phones are powered by a data switch which is your Local Area Network.  Each phone and/or data device requires a powered data ‘port’ to power that device on the network.*  Many networks already employ Power over Ethernet (PoE) switches to provide this power.  If not, upgrading your network to PoE switches does not have to be a major cost item.  We will work with your IT support provider, or can assist you in providing the proper PoE switches to meet your needs.


*Powering IP phones can also be accomplished via the use of a ‘power adapter’ plugged in to an electrical outlet and the phone; or via power ‘injectors’ that can power individual ports on non-PoE switches.  The PoE switches discussed previously however, are the preferred manner for powering a larger number of IP phones.

The result?  One network that supports both your voice and data needs.  With the phone system on your network, System Administration can be performed from any PC on the network.  Phone moves and additions become plug & play as IP phones store extension number and programming info, not the phone system. There are other advantages of voice and data served via a single network.  We look forward to discussing them with you.  

Cedar Rapids 319-393-0585

ESI on-premise IP business telephone systems that support SIP trunks

We also offer ESI's Hosted service.  This is a Cloud based service in which charges are incurred on a per phone, per month, basis.  We prefer an on-premise solution, if for no other reason than that long term savings to our customers versus a Hosted alternative in which you pay that monthly service forever.


It is important to note however that regardless of which option you select, an on-premise solution or a Hosted alternative, the same network requirements discussed above will be required.  This has a tendency to get lost in discussions regarding Cloud based or Hosted alternatives.  

ESI IP phone systems in Cedar Rapids
​ESI IP phone systems in Iowa City

IP Business phone systems

What is involved in the transition from a digital phone system to an IP phone system?

Call us... 

Des Moines  515-331-0444

Cedar Falls/Waterloo  319-229-7454

Iowa City  319-333-7714

Making the transition

to an IP phone system

New Hampton  641-394-3301

Voice Over IP Phone Systems​
Voice over IP Business Phone Systems