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Cloud-Based PBX Phone Service Calling Features

The Open Systems Group' Cloud-Based PBX Phone Service includes over 36 call features.

Auto Attendants

Customer Portal

Web based user interface that allows users to configure their PBX,create call queues and groups, view call detail records and billing information, listen to and delete your voicemail, upload music on holdand more.

Unlimited Auto Attendants

The Open Systems Group' Cloud-Based PBX Phone Service allows for any number of Interactive Voice Response Auto Attendants.

Top Level Auto Attendant

Allows a caller to select from menu options using a standard telephone keypad. Through the portal interface, calls can be routed to extensions, mailboxes, groups, conference rooms, call queues, or unlimited depths of additional auto attendants.

Multiple Top Level Auto Attendants

Allows for separate telephone numbers to be routed to unique Top Level Auto Attendants. Each Auto Attendant is configurable individually.

Top Level Auto Attendant (Time Based)

Available after n rings or based on time of day.

Sub-Level Auto Attendants

Sub-Level Auto Attendants are often used for different departments within an organization. For instance, you may have a main Auto Attendant for the company, and then a sub-level Auto Attendant for Sales, Support, etc.

Call Management

Unlimited Shared Virtual Call Paths

Virtual Call Paths are used to deliver calls to and from the PSTN to either hosted end points or SIP trunks. They are shared/ “pooled” by all end points on a given customer Cloud PBX, regardless of location.

Pooled Call Paths across the Enterprise

Customers can purchase any number of call paths to suit their needs, with the only limiting factors being cost & bandwidth consumption (typically 80Kbs per call).

Burstable Virtual Call Paths

The Call Paths are also “burstable” meaning you can configure the Cloud PBX to give extra call paths “on-demand” to deliver additional calls beyond the number of paths purchased, up to 10 additional paths. The system will automatically track and bill the customer for the extra call paths. They will have use of the additional call paths for the remainder of the of the billing period.

Auto Attendant Answering

Setup a telephone number to dial directly to an Auto Attendant. Callers are then presented with predefined options via the Auto Attendant Feature.

Live Person Answering

Setup a telephone number to ring a specific extension first, or a group to enable sequential or simultaneous rings. This enables your company to have a live person answer the caller, and not an auto attendant.

Direct Inward Dialing

Setup a telephone number to forward a call directly to a device or extension.

2, 3, or 4 (or More) Digit Extensions

Your cloud-based PBX can support 2, 3, 4 or more digit extension dialing.

Caller ID

Customize the appearance of your outgoing Caller ID (CNAM) by the exteral number or by the extension


Associate a voicemail box with an extension, or use an announce-only voicemail box to provide customers with a pre-recorded message when they choose an option on an auto attendant or extension.

Voicemail to Email

After a voicemail is received, the cloud-based PBX will send an e-mail message to any valid e-mail account or alias that you enter into the Customer Portal. The message will include the date and time of the call, as well as the duration, caller ID if provided, the mail box number, and an attached WAV file that can be played on your PC or mobile device (ie. smartphone or PDA capable of playing WAV files).

Voicemail to Text Message

For customers that don't have a smartphone or PDA capable of playing WAV files, you can enter an SMS address in the Customer Portal and the cloud-based PBX will send a shorter text message to your device. Third party text messaging rates may apply.

Call Groups

Group a number of extensions together as one destination. Calls may be routed sequentially or simultaneously to that group. Useful for Sales Departments.

Find Me, Follow Me

Setup a personal assistant to “find you” at up to five (5) locations. This feature is configured per extension, and offers an extensive number of options to route calls once they have reached the given extension. Callers are asked to “announce themselves”, and are offered the option between locations to try the next location, or to leave a message. More than simply call forwarding, calls can be routed to multiple numbers simultaneously, office extensions, residence phones, mobile devices. Wherever you are the caller will find you.

Call Hold

Place calls on hold, and play music or a commercial while the caller is on hold.

Attended Transfer

Transfer a call to an extension, group, or phone number after announcing the party being transferred.

Unattended Transfer (Blind Transfer)

Transfer a call to another extension, group, or phone number without announcing the party being transferred.

Call Forwarding

Forward calls via the Customer Portal, or via your device or Softphone. Calls may be forwarded to any extension or phone number. Device or Softphone forwarding functionality may vary by the handset manufacturer.

No Answer Call Forwarding

Automatically forwards your calls to an extension, group, or phone number when you do not answer your phone.

Busy Call Forwarding

Automatically forwards your calls to an extension, group, phone number when your phone is busy.

Incoming Call Blocking

“Black list” phone numbers to block them from calling your PBX.

Incoming Privacy Screening

Force callers with “no caller ID” or “blocked caller ID” to enter a number that will be presented as their caller ID.

Incoming Caller ID Routing

Route calls from a unique DID or phone number to any auto attendant, extension, group, phone number, or ACD or Call Queue.

Incoming DID Routing

Route calls based on the number that was dialed. Calls may be routed to an auto attendant, extension, group, phone number, or ACD or Call Queue.

Outgoing Call Blocking

Prevent calls to specific numbers or services (ex: 900 calls)

Incoming Call Identification

Identify an incoming call on the phone’s LCD display by modifying the Caller ID display indicating how the call was routed.

One Button Redial

A device or Softphone feature that redials the last number dialed by the extension user. Not all handsets support this feature.

Do-not-disturb (DND)

A device or Softphone feature that simulates a phone being off-hook, routing calls directly into voicemail. Other routing options are also available.

Call Waiting Indicator

Indicates incoming call (and caller ID, if available) while another call is in process.

Automatic Call Distribution (ACD)

Used to route calls in a call center environment to the appropriate agents, based on factors such as time availability, behavior, and priority levels.

Call Queue

Call queues are used to route calls in a first-in-first-out manner to the appropriate extension or group. These extensions can be agents logged into the system. Call Queues are commonly used with an ACD, where the callers hear an announcement that says something like “thank you for calling, all available agents are busy, please hold for the next available agent, or press N to leave a message”. When the call is ready to be routed, the ACD handles the routing rules.

Call routing based on time-of-day

Allows routing decisions based on time and date. Multiple schedules can be configured, as in the case of departments with different hours of operation. (e.g. business hours, after hours & holiday hours)

Speed Dial

A device or Softphone feature that automates the dialing of a predetermined phone number.

Company Wide Directory

A list of contacts and phone numbers that are uploaded via the CoreDial Portal, and are made available on an IP phone or Softphone.

Forward your calls Locally or Remotely via Phone or Web

Forward and route calls as needed.

Caller ID Blocking

Disable Caller-id for all outbound calls made from your cloud-based PBX.

Call Recording

Selectively record calls for training or documentation purposes. Only available for dedicated, cloud-based servers.

Office Intercom

Dial another user’s extension, activating their phone speaker to make an announcement. (available with only certain makes and models of handsets)

Disable Outbound Dialing

Disable Outbound Dialing on certain extensions only.

Call Conferencing

3-way Conference Call

After making or receiving a call, a user may conference in any third party for a 3-way call.

Multiple Conference Bridges

Multiple on-site and outside callers can simultaneously participate in password-protected conference calls. Callers can be assigned talk-listen or listen only access.

Music on Hold (MoH)

Default Music On Hold

Royalty free music provided.

Custom Music On Hold

Customer may upload their own Music on Hold in WAV file format.

Commercial On Hold

Customer may upload their own commericals in WAV file format.

Commercial On Hold By Location or Queue

Multiple commercials on hold may be uploaded to your PBX, and can be unique based on location or queue.

Web based presence and call control application that allows users to drag and drop calls to/ from other extensions, parking lots, conference bridges and out of call center queues. There is also access to voicemail, contacts lists for click-to-dial and chat functions.

SIP Trunking

SIP Trunking

Connect PBX or Key System’s directly to our platform and deliver “dial tone replacement” with as many virtual calls path as required. We interoperate with many ATA, IAD and SIP Gateway devices, or you can connect your “SIP Enabled” PBX to realize the flexibility and cost savings of business-quality VoIP.

Standard SIP Trunk

A standard SIP trunk delivers calls to the premise equipment and acts like a CO line. If the SIP end point is offline or cannot be contacted by our system, our system issues BUSY signals to the incoming callers.

An enhanced SIP trunk delivers calls to the premise equipment and acts like a CO line. If the SIP end point is offline or cannot be contacted by our system, our system provides an alternative predefined route for the incoming calls. Examples are routing calls to an Auto Attendant, other SIP trunks (at other locations), voicemail box, or a Find-Me Follow-Me sequence. This disaster recovery feature is extremely powerful and flexible.