What is Cloud PBX?

A cloud-based PBX uses the Internet to deliver all features of an enterprise on-premise PBX without the hardware, set up fees, and maintenance costs.

OpticalTel CLOUD PBX is the solution to the on-premise PBX, which is simply expensive, difficult to maintain, and not practical. With our Cloud PBX initial setup costs go away, as well as fees to hire a vendor to perform simple Move, Add and Changes.

On-premise PBX’s also limit scalability and mobility. With our CLOUD PBX, the system is future-proofed, the amount of users and trunks are virtually limitless, and you are not confined to the premise. You can seamlessly integrate multiple locations, mobile phones and tablets, have remote office workers, and take your office with you.

Cloud PBX


  • No on-site phone system to manage
  • Unlimited calling to the continental US and Canada
  • Hosted service offering
  • Free professional installation and activation*
  • Free IP phones*
  • No upgrades, maintenance, or patches to manage
  • One main local number and one number per user
  • One online fax
  • Online portal to manage – Moves, Adds and Changes
  • System is future-proofed and endlessly scalable
  • Support remote worker and take your office anywhere
  • One system for multiple locations
  • Advanced business phone features
  • Easy to upgrade
  • Dedicated account representative to manage your account
  • Unified Communications (UC)


  • Auto-attendant
  • Account codes & authorization
  • Attendant console . Call Centers
  • Call intercept
  • Conference calling
  • Calling group ID delivery
  • Calling plans (incoming, outgoing)
  • Configurable feature codes
  • Device Inventory
  • Department support
  • Hunt group, series completion
  • Simultaneous ring group
  • Music & Messages on-hold
  • Dial-by-name directory
  • Printable group directory
  • Voice portal


  • Unified Messaging (one inbox for your e-mail, faxes)
  • Retrieval from phone or email
  • Personal greetings & name recording
  • Voice message call-back
  • Voice message waiting indication
  • Voice messaging notification (by email also)

User Services

  • Call manager (dial, answer,release, hold, retrieve, blind)
  • Call forwarding (always busy, no answer, selective, remote)
  • Call notify
  • Call park & call pickup
  • Call return & last number redial (*69)
  • Call screening by digit pattern
  • Call trace
  • Call waiting & cancel call waiting per call
  • Distinctive & priority alert
  • Do not disturb
  • Extension dialing
  • Flash-enabled services & star codes
  • IP phone support & authentication
  • Remote office
  • Selective & anonymous call rejection
  • Shared call appearance
  • Simultaneous ring
  • Speed dial . Call queues
  • Answering rules
  • Caller ID
  • VolP phone service
  • Internet (electronic) faxing

Our award winning business 4G Wimax network

Purpose Built for reliability & performance

Voice quality now in HD

Experience that huge improvement on the phone with HD voice. With a 4G Wimax broadband connection your Sling Broadband HPBX calls will sound crystal clear. And, with supported phones, your on-network conversations can have twice the audio fidelity of a normal phone call.

  • Auto Attendant
  • Extension Dialing
  • Music on Hold
  • Messaging on Hold
  • Ring Groups
  • Outlook Integration
  • ACT! Integration
  • Netsuite Integration
  • Advanced Call Forwarding
  • Phone-Based Management
  • Android and iPhone app
  • Hosted PBX
  • Directory Assistance Listing
  • Online Billing
  • Simple Online Administration
  • Local Number Porting (LNP)
  • Online Dashboard
  • Salesforce Integration
  • Do Not Disturb (DND)
  • Internal/External Ring Tones
  • Stutter Tone Notification
  • Local time Display
  • Unlimited Calling
  • Direct Phone Number
  • Personalized Voicemail
  • Voicemail to Email
  • Conference Bridge
  • Caller ID with Name
  • Call Waiting
  • Caller ID Blocking
  • Call Transfers
  • Call Park
  • 3-Way Calling

The Ideal PBX Solution With All The Right Benefits

A new standard in communications that drives the speed of business

Improve Service and Professionalism

Are your customers professionally greeted when they call you? Virtual receptionists (a.k.a. phone-bots) are efficient, professional and never need a break; they can dramatically improve your customer’s experience when calling your company. You can easily create virtual receptionists with a customizable menu system, including a dial-by-name option.

Listen to your Voicemail in your Email Box!

Save 300 hours per year by reading or listening to voice messages in your email inbox, allowing your staff to be more productive. Voicemails are forwarded to your email account as an attached audio file with phone number and caller information.