We offer state-of-the-art products custom fitted to provide a solution for your company’s needs. We take the time to understand your organization’s needs and then discuss possible options. This allows the client to have a choice instead of a single source option that competitors offer. David Davis Communications only partners with select companies which meet our high level quality, technology features, and on-going support.
ESI designs and manufactures telephone systems and applications for businesses. ESI’s systems offer advanced technological design and extreme ease of use, yet are very cost-competitive. The product line includes ESI’s family of Communications Servers, which support both digital and IP technologies in any desired combination. ESI’s markets phone systems through a nation-wide network of hundreds of factory-trained Certified Resellers. Founded in 1987, ESI is a rapidly growing, privately held corporation with headquarters in Plano, Texas.
IP Server 900 +
The capacities described below are maximums, which will vary based on your IP Server 900’s configuration and licensing, as well as the extension dialing plan (four-digit or three-digit) which your Certified ESI Reseller helps you select.Better business communications through IP
The IP Server 900 is an appliance that combines the reliability of a traditional phone system with the flexibility of network connections, using Internet Protocol (IP) technology. This improves your business communications — delivering enhanced customer satisfaction, increased productivity, and an improved bottom line.Scalability
The IP Server 900 is built to grow with your business — intelligently. And, thanks to the large number of features the IP Server 900 shares with many other ESI systems, past and present, retraining is minimized if you migrate from one model to the next. You can start small and grow as large as you’re likely to need — up to 192 outside lines and up to 864 stations. Additionally, if you have access to high-bandwidth service, there’s support for up to 192 T1 channels or 168 PRI lines.Powerful voice mail capabilities
The integrated voice mail system includes up to 32 always-available channels and includes ESI’s exclusive Quick Groups™, Quick Move™, and Virtual Mailbox Key features. Your ESI Reseller can also provide ESI’s innovative VIP 7 family of Windows-based communications management tools.Extensive phone options
- ESI 60 Business Phone — Available in digital, Gigabit Ethernet IP, and 10/100 IP models. Each includes an adjustable backlit display, high-definition full-duplex speakerphone, and 48 programmable feature keys (with paperless display of key settings) to simplify handling your messages and call recordings.
- ESI 40 Business Phone — Available in digital and IP models. Each includes an adjustable backlit display, speakerphone, and 16 programmable feature keys.
- 24-Key Digital Feature Phone — Includes speakerphone and 12 programmable feature keys.
- ESI Cordless Handset II — Three models: Digital, [local] IP, and Remote IP; IP models allow Power over Ethernet® (PoE) or AC power for your maximum convenience.
- Standard analog sets.
- Third-party SIP stations (consult your ESI Reseller for compatibility information).
Some examples include ESI’s enhanced Caller ID1, live call recording and screening, ACD, Esi-Dex™ speed-dialing, built-in message-on-hold, and Verbal User Guide.Esi-Link (multi-site) support
Multiple ESI business phone systems can be interconnected across an enterprise’s dedicated WAN, creating virtually seamless connectivity among multiple offices. While some competing systems are unable to provide more than bare-bones phone features in such arrangements, Esi-Linked distant extensions operate as though they were local, providing one-button and abbreviated dialing, simplified call transfer, multi-system hold, conference calling, and message sharing.Remote connection capability
With the rapid growth of broadband services like DSL and fiber-optical, ESI IP phones can be deployed to small remote locations such as local sub-offices or teleworkers’ home desktops.
System FeaturesFull integration
The IP Server 900 Master Control Unit contains a phone system, voice mail system, and automated attendant — all working together as an integrated whole.Standards-based IP design
The IP Server 900 complies with these major industry standards:
- Layer 3 Quality of Service (QoS) support via DiffServ
- G.711, G.726, and G.729 packet compression
- 802.3 100Base-TX Ethernet interfaces
- Layer 2 QoS support via compliance with 802.1p and 802.1q
- 802.3af Power over Ethernet (PoE)
- T.38 fax relay
The IP Server 900 supports up to 64 conference callers, with up to 16 persons per conference. Also features “meet-me” conferencing, with greatly simplified conference setup and up to 31 participants per conference.“Find-me”
Forwards calls sequentially to up to five other numbers — particularly useful for off-site users who are “on call.”Twinning
Lets you pair an extension with a second number (such as a cell phone) so an incoming call rings both phones, making you more accessible.Message-on-hold (MOH) recordings
This feature provides a professional sound without licensing fees. Use the three supplied music tracks, or record and use up to nine of your own.Auto attendant
Provides extensive call routing, including directories, automatic day/night operation, off-premises transfer, cell phone and pager notification, and more.Automatic call distribution (ACD)
ACD places sales or service personnel in departments and either (a.) routes a call to the longest-idle agent or (b.) places the call on hold if all agents are busy and then immediately connects when the first agent is available. Constantly updates the ESI desktop phone’s display regarding queues and wait times.Highest voice quality
Records voice messages with 64-kilobit-per-second sampling, for the highest quality sound a telephone line can carry.Account codes
Lets you verify client billing and manage time more accurately by inserting one or more numerical codes during a call.Call statistics
Delivers detailed reports at the touch of a key and provides SMDR.T1/PRI support
Lets larger offices make complete use of broadband lines.Up to 176 fully functional analog ports
Each allows voice mail, park/retrieve, transfer, page, call waiting, off-premises message delivery and more.Esi-Dex speed-dialing
Calls any number from three separate lists (personal, station and system); uses Caller ID1 information or direct keypad entries.Intelligent Call Forwarding™
Forwards calls to you when you’re away from the office and sends along the real caller’s original Caller ID1 information (if it’s someone calling from another extension on your ESI business telephone system, you even see his/her extension number), so you can see who the real caller is.Optional shared-office tenanting
Allows multiple business entities to share the same system while maintaining separation of various facilities and features. The IP Server 900 supports up to eight tenants.TAPI support
(Basic Telephony Service.) Provided via an optional VIP 7 application.Dedicated overhead paging interface
Allows intra-system paging through the speaker built into the ESI desktop phone or through an ancillary overhead paging system.T.38 fax relay
Uses industry-standard method to relay faxes via IP to devices on the network.
Optional ESI Presence Management
- Presence indication
- Access control
- ESI’s Personal Call routing
- Time and attendance logging (further enhanced by optional third-party PC software)
- Video monitoring support (in league with ESI Media Management)
Optional ESI Media Management
- Better management of your organization through informed risk reduction
- Call logging and recording
- Live and recorded video
- Monitoring of ESI Presence Management building access events
- Simple filtering for identifying notable events and recordings
- Archival and exporting of data (including audio and video)
Session Initiated Protocol (SIP) trunking, offered by a growing number of Internet telephony service providers (ITSPs), uses IP to connect business communications systems to the public telephone network. The IP Server 900 takes full advantage of this capability. Your ESI Reseller will help you select an ITSP that’s appropriate for your location and communications needs.eSATA port
Allows connecting third-party hard drive to store media recordings (from use of optional ESI Media Management).Simple Network Management Protocol (SNMP)
Allows monitoring devices via IP.Application programming interface (API)
For integrating third-party solutions (such as Salesforce.com®).
Voice Mail FeaturesUp to 32 built-in voice mail ports
“Always-on” channels available for voice mail, auto attendant, call recording without using system trunks or station ports.Off-premises message delivery
Delivery to a cell phone or home phone combined with pager notification, for extensive notification capability.Urgent messages
Can deliver higher-priority messages first.Message Recycle Bin (undelete)
Remembers, and can restore, each mailbox’s 10 most recently deleted messages.Quick Groups
When a user wants to share a message with several other users, this feature lets the user do so by just pressing VOICE MAIL and the appropriate station keys.Quick Move
Press a station key during live recording to move the message automatically to that user’s mailbox.Virtual Mailbox Key
A programmable function key “tied” to any mailbox; allows simplified monitoring of a second mailbox.Multiple personal greetings
Pre-record up to three greetings and assign them to a programmable key for one-touch selection.AutoPage™
Allows a caller forwarded to a user’s voice mailbox to page the user over the user’s business’s internal overhead paging system.QuickPage™
Lets one station user QuickPage another station by pressing a designated QuickPage key followed by either a station extension or a programmable key set for a station.Guest mailboxes
Make it possible to give voice mail to personnel (such as those in outside sales or manufacturing) who may not have actual extensions assigned to them. A guest mailbox can be handled like a regular extension (e.g., listed in the directory, assigned a station key, etc.).Info mailboxes
These can be used to give callers information on a variety of different subjects by “publishing” these mailbox numbers.Broadcast mailbox
The broadcast mailbox is used to leave a single message in all of the system’s users’ mailboxes.Group mailboxes
The IP Server 900 can support up to 32 group mailboxes with up to 64 members each. Users can set or change the list of group mailbox members.Message notification
On a mailbox-by-mailbox basis, the system can be programmed to call an off-premises number or another extension to deliver messages and/or dial to an external commercial paging network to activate a user’s pager.Cascade notification mailboxes
Up to 20 cascade notification mailboxes can be assigned to anyone who requires escalating levels of notification (such as to cell phones or pagers) beyond the single level available in all user mailboxes.Q & A mailboxes
Up to 20 question-and-answer (Q & A) mailboxes can store 10 questions each. The individual answer segments recorded by the caller are stored as a single message, with the answer segments separated by short beep tones.Optional VIP 7 family of Windows-based applications:
- Provide on-screen call control, voice mail management, and contact management.
- Text-messaging that’s safe from the Internet
- Much more than simply unified messaging.
- And for more specific needs, there also are these VIP 7 applications:
- VIP 7 PC Attendant Console — Helps you more efficiently manage your office’s call traffic.
- VIP 7 ACD — Designed around the specific needs of ACD supervisors and agents.
- VIP 7 Softphone — Puts the features of an ESI desktop IP phone on the PC screen.
Auto Attendant FeaturesSix levels and 100 branches
The many branches allow setup of a more caller-friendly answering environment, including a company directory.
Virtually unlimited call routing — Includes off-premises transfer, pager notification, more.
Station FeaturesCall waiting
Display shows both calls’ Caller ID1 information; user can toggle between calls by pressing the FLASH/RDL key.Enhanced Caller ID
ESI’s patented enhancements allow one-keystroke return of a call as well as quick addition of the caller to the user’s speed-dial list.Personal Caller ID
Makes clear who the caller is, rather than using the Caller ID of the main number; this is particularly useful if one should have to call 9 1 1 from a multi-floor or multiple-site business.One-touch access to a number of features
This lets the user press dedicated keys rather than having to remember multi-key codes. To access voice mail, the user just presses VOICE MAIL; to perform a conference call, CONF; or, to transfer a call, TRANSFER.Esi-Dex built-in directory
- Works with Caller ID1 to keep an alphabetical speed-dial list; accessible with a keystroke and shown on the display.
- Three separate speed-dialing lists: personal, station and system.
- Users can make entries directly from the desktop phone keypad, as well as scroll through lists (to save time, users can select which names to view within each list).
Shows Caller ID data for an extension’s last 25 callers. The user can return each call by pressing one key.Live call recording
Record a conversation, conference call or personal reminder memo for later playback, as well as moving or copying to others’ mailboxes.Live call screening
Works like a home answering machine; the user can listen to a message while someone leaves it. The user can pick up the handset at any time to take the call or just let the caller continue to leave a message in his/her mailbox.Verbal Help Key™ and Verbal User Guide™
These use hundreds of prompts to guide users through virtually every feature of the system.Virtual Answer Key™
For use when one is already on another call but wants to give special attention to a second call that’s in call waiting. Set as many as two programmable feature keys to be Virtual Answer Keys. Each plays a recorded greeting telling the caller the user knows he/she is calling and, depending on programming and how the prompt is recorded, can also give the caller an easy way to dial out to another extension where he/she can gain immediate assistance.Service observing
Lets authorized personnel silently observe (and record) station-to-outside calls.Off-premises “reach-me”
Allows a caller forwarded to one’s voice mailbox to reach the user at an external number (e.g., home phone or mobile phone).Dedicated HOLD key
Supports both system-wide and exclusive (station-specific) hold. Permits virtually unlimited hold “orbits.” (Also supports hold/retrieve with analog phones.) Holds calls for easy pickup at any station without elaborate codes to remember. For exclusive hold, just hold down the key for a second.Optional Expansion Consoles.
- 60-Key Expansion Console connects directly to ESI 60 or ESI 40 Business Phone.
- Second Expansion Console connects to 60-Key Expansion Console to provide an additional 60 programmable feature keys (for a total of up to 168, since the ESI 60 Business Phone has 48).
Programmable Feature Keys
The programmable feature keys can be programmed as follows:CO line key
Provides direct access to a particular desired line.Station key
Provides direct access to, and lamp information for, extensions, departments, guest mailboxes, etc.Speed-dial key
Provides one-touch key for outside calls.Special feature keys
Can be set to provide one-touch access to the following features:
- Caller ID key (shows last 25 callers)
- Quick Switch key (for use with ESI Cordless Handset II)
- Overhead paging key
- Message monitor key
- Manual day/night mode key
- Background announce key
- Service observing key
- Personal greeting 1
- Personal greeting 2
- Personal greeting 3
- ACD agent log on/off key
- ACD agent wrap key
- ACD administrator key
- Headset key
- Virtual Mailbox Key
- Virtual Answer Key
- Call forward key
Analog Extension Ports
Up to 176 analog extensions can be programmed, based on the system configuration. The ports can be defined as:Phone
Designed to provide for standard 2500-type phones.Common ringer
Connected via a tip-and-ring pair; will apply ring voltage whenever a line rings in night mode.Fax
If the auto attendant detects a fax tone, it will automatically forward the tone to the analog port programmed as a fax device.Modem
Incoming calls for a modem can be manually transferred to the modem extension; also, the modem can automatically generate outbound calls.Doorphone
A telephone connected to this port will automatically dial the programmed ring-down extension number whenever the set is taken off-hook.
Communications Server Line +
Communications Server is a powerful tool around which you can build your organization’s entire telecommunications strategy — and you don’t have to know it all in advance.
That’s because an ESI Communications Server — the ESI-1000, the ESI-600, the ESI-200, the ESI-100, the ESI-50, or the ESI-50L — can be a traditional digital business phone system, a fully standards-based IP telephony system, or any mix of the two. The choice is entirely yours, and the mix can easily change when your needs do.Ready to shoulder the load for your business
Each ESI Communications Server combines multiple first-rate, feature-rich systems into one tightly integrated unit:
- Business phone system
- Voice mail
- Automated attendant with six levels and 100 branches
- Enhanced Caller ID4
- Automatic call distribution (ACD)
- Intelligent Call Forwarding™
- Optional Windows-based VIP family of communication management tools
- Optional ESI Presence Management
- Optional ESI Bluetooth® Voice Integration
- Network-based VoIP telephony
Properly configured by your Certified ESI Reseller, an ESI Communications Server can handle your heaviest communications needs. There are multiple models, with differing capacities, but all share the features mentioned above, plus:
- Digital stations, IP stations(including SIP), or any combination thereof
- T1/PRI support
- Massive voice message storage
- Sophisticated voice mail features
- Powerful — but friendly
Despite its long list of features, an ESI Communications Server — thanks to famous ESI ease-of-use — is a phone system you’ll find friendly. It says, “Good morning.” It teaches you how to use and program it. It reminds you to change your personal greeting after a trip. And it stands by, ready to assist you whenever you need help. There are several different models of ESI desktop Feature Phones. Each is a compact, attractive addition to any desk, designed to simplify your telecommunications. Here are just two examples:
- The display is large and easy to read; that's even more true for a backlit display, which is available on certain models.
- The dedicated function keys (so you don’t have to memorize codes) give you more ease of use, even with an ESI Communications Server’s enhanced capabilities.
If you’re frequently on the move throughout your workplace, an ESI Cordless Handset is the easiest way to stay in touch with other system extensions, not to mention your voice mail. The ESI-exclusive Quick Switch feature makes it easy to go from desktop extension to Cordless Handset at a moment’s notice; just press a key. Or, if you’re “tied” to your cell phone, ESI Cellular Management — part of ESI Bluetooth Voice Integration — simplifies your communications through the power of fixed/mobile convergence.Easy to choose; easy to use
Regardless of the model you choose, any ESI Communications Server is an easy choice over other business communications systems. Its ease of use and feature-richness reduce staff frustrations, increases productivity, and enhances your corporate image. And each ESI Communications Server’s unique integration provides call-processing efficiency and cost savings that previously were impossible.
VIP and VIP Professional +
All of ESI’s VIP PC applications let you combine the power of your ESI phone system and Microsoft Outlook to enhance communication in your day-to-day activities — including the ability to control calls and organize voice mail and contacts. VIP (Visually Integrated Phone) comes in two “flavors”: the basic VIP and VIP Professional. Each configuration is licensed independently, with easy migration from VIP to VIP Professional. Each lets you intelligently do the following from your PC’s screen:
- Manage your telephone calls
- Manage your voice mail
- Organize your contacts
- Log all your inbound and outbound calls
- Quickly program your ESI Feature Phone
With VIP Professional, you also get:
- Enhanced, more informative user interface
- Secure text-messaging
- Auto-recording capability
- Compatibility with VIP PC Attendant Console, VIP ACD, and VIP Softphone
These independently licensed members of the VIP product family, all compatible with VIP Professional, add their own specific capabilities:
- VIP PC Attendant Console — Makes it easier for even the busiest attendant to handle call traffic efficiently.
- VIP ACD — Helps you improve the quality of your customer service when used with ESI systems with their built-in ACD (automatic call distribution).
- VIP Softphone — Lets you use your PC to connect to your ESI Communications Server from nearly any location with a broadband connection.
Regardless of your selected configuration, VIP is easy to implement. It connects to your existing local area network (LAN) and is non-invasive. There’s no need to upgrade the LAN or install Microsoft Exchange® — thus avoiding a costly and impractical solution for the small to mid-size business.
ESI Presence Management +
ESI Presence Management is a hardware and software solution incorporating an innovative combination of RF scanning technology and ESI's award-winning telephone systems. Now even small and medium-sized enterprises can reap the benefits of:
- Presence indication.
- ESI's Personal Call Routing.
- Access control.
- Documented tracking of users' work hours and attendance history.
ESI Presence Management is offered as a basic doorphone solution for addressing basic entry and exit applications, and as an advanced supervisory solution utilizing RFID technology to provide access control and personnel location. Optional ESI TimeLine™ PC software maximizes the value of this amazing product.
Up-to-date list of business phone systems compatible with ESI Presence Management:
- ESI Communications Servers
- IVX S-Class Generation II
- IVX X-Class*
- IVX E-Class Generation II*
- *Legacy product
Hosted VoIP offers a flexible phone solution that provides a wide range of advanced features and functionality without straining your budget. There are no special maintenance or system upgrades required to receive the latest technology. Hosted VoIP will save time so the IT department can focus their efforts on maintaining and developing your data network.FEATURES:
- Multiple offices brought together
- Never miss a call with “find me/ follow me”
- Project presence anywhere
- Unlimited anywhere
- Unlimited everything
- Cell phone integration
- Computer/desktop integration
Benefits of Hosted VoIP phones +
With the ever-growing unpredictable circumstances in today's business world, it is important to have the most advanced technology while saving as much money as possible. Hosted VoIP is the perfect solution for those who are looking for an economical option. The only requirements are VoIP-ready handsets - no expensive systems are required. The phone and data lines no longer need to be managed, saving your company each month on billing expenses. The high priced traditional phone lines are a thing of the past.IT Support
Minimal IT support or training is required for Hosted VoIP, unlike its complex traditional counterpart. You can add users, delete users, or enable additional features, all without support from the IT department. The easy-to-use web interface right from your computer makes waiting for IT support for simple tasks a thing of the past.Hosted VoIP Savings
Hosted VoIP is the economical choice. There are no large servers or systems to be purchased and installed. The only material items needed are the phones. With Hosted VoIP, you have an affordable monthly service fee.Business Continuity
How will your potential customers, existing customers, and business partners react if they called your line and it was out of service? It is important to be prepared for disasters and have a plan for recovery. Many businesses lose their phone system to physical damage due to fires, floods, and other natural disasters. However, with Hosted VoIP business could go on uninterrupted because it is secured in a state-of-the-art collocation facility. Employees can work anywhere through the use of cell phone or any other undamaged phone. The web-based system gives you a fast and easy way to take control of a disastrous situation and turn it into a minor incident.More Functionality
The advanced features and functionality that a Hosted VoIP system provides to a business is impressive. Hosted VoIP is custom designed for your company by activating the necessary features needed to improve your business communications and make the company more productive. Calls can be made remotely from a cell phone or remote location and have it appear as a call from the main office. Hosted VoIP, also provides you with HD Voice to give you the clearest calls possible. Microsoft Outlook or your Customer Relationship Management system can be integrated and voicemails can be forwarded right to your email.Automatic Upgrades
Without a server, there are no hardware upgrades needed in order to access new features and technologies. Hosted VoIP service providers conduct software updates automatically without the customer having to wait for the update to load. A notice is then sent online to make you aware of any new capabilities. This allows your employees to quickly utilize the new capabilities and offer better customer service.Productivity Everywhere
Hosted VoIP is constantly moving forward, so don't let the desk phone hold you back in your office. It's ideal for businesses with employees always on the go. Expand your business communication horizon from the road, conference room, desk, or at home with Hosted VoIP. You have the advantage to keep moving forward no matter where or when business may take place.Focus on What Matters
Focusing on your business is the best way to maintain a competitive edge in the market. Since Hosted VoIP is managed offsite, you do not have to worry about managing the complexity of a phone system. The system maintenance is handled in the background while employees utilize the most advanced features of voice, video, and wireless communications. Hosted VoIP is one less stressor at work, knowing that it is always a reliable source of communication allowing your business to focus and attain new goals.
Avaya is a global leader in communication systems, applications and services. We design, build, deploy and manage networks for enterprises. Customers range from small businesses and nonprofit agencies up to more than 90% of the companies in the FORTUNE 500, and the U.S. government. They all rely on Avaya for reliable, secure networks that facilitate customer relationships, enhance productivity and maximize profitability.
IP Office +
Avaya IP Office is an intelligent communications solution specially designed to meet the communications challenges facing small businesses. Intelligent Communications for small businesses addresses basic telephony needs, leverages built-in convergence capabilities, and capitalizes on the robust unified applications to deliver intelligence to users and customers. IP Office provides solutions that simplify processes and streamline information exchanges within a system to create simple and prosperous experiences.
Avaya IP Office is a highly modular IP telephone system designed to specifically meet the needs of home offices, standalone businesses, and networked branch and head offices for small and midsize businesses. Built on Avaya's latest advancements in converged voice and data technology, small to midsize businesses can benefit from many of the advantages sophisticated communications systems deliver to their operations. The IP Office phone system supports a wide range of telephones, but the Avaya 5400 Series Digital phones and 5600 Series IP phones have been specifically designed to work with IP Office and provide small and midsize businesses with a choice of solutions to meet business efficiency and customer service requirements.Business Benefits
- Total voice and data communication solution for small and mid-sized businesses.
- Functions as a traditional phone system or an IP Telephony Server.
- Supports both single locations and multi-site networks.
- Basic call center and voice messaging capabilities are built-in.
- Scalable as business needs grow.
- Protects current investments in communications
Partner ACS Phone System +
Reliability, simplicity, a large selection of advanced telephony features, and converged communications through fractional T1 make the PARTNER® Advanced Communications System ideal for small growing businesses. This system is designed to help meet the complex business needs facing small enterprises today with room for growth to meet future needs. Available for more than 16 years, over one million PARTNER systems have been sold worldwide.
The totally redesigned PARTNER ACS Release 7 processor delivers enhanced system functionality, growth, and a system processing speed that will set the stage for future enhancements and additional applications. All existing expansion modules and sets from older PARTNER ACS system can be used or reused in conjunction with the new 509 processor. This exciting change means cost savings for customers who require more than three CO lines and even more flexibility in growth.Business Benefits
- Many included applications to simplify answering calls such as built-in Caller ID support and standard connections for answering machines, cordless sets, credit card readers and fax machines.
- Improved Customer Service by enabling businesses to respond quickly and with quality to customers
- Mobile employees can stay connected to the business with 3910 Wireless Telephones.
- Standard Fax Management notifies users when the fax machine is busy, in use or in trouble so that it can be immediately repaired.
PARTNER telephones have a sleek, modern design and improved tactile feel complete with enhanced buttons and a new handset. There are different PARTNER telephone models to choose from, each available in either black or titanium white: 6 button display, 18 button display and 34 button display. Additionally, the 48 button Call Assistant (CA48) is also available in black and titanium white.
With the addition of a 6 button display phone, the PARTNER telephones are perfect for price-sensitive customers that want to take full advantage of PARTNER's comprehensive feature set. In fact, the entire PARTNER telephone line comes standard with a backlit display! According to a recent study by the Yankee Group, Caller ID subscription rates for small and medium businesses have grown considerably over the past 3 years, with more than 70% of them opting for the service. Caller ID is a "must have" requirement that increases productivity, improves customer service, and saves valuable time for the business owner.