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Intercom calls

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Intercom calls enable users belonging to the same group to use two phones like an on-door speakerphone. When one user dials a special code before the other user’s phone number, a two-way audio channel is established automatically. The other user does not need to pick up his handset; instead, speaker-phone mode is activated and both users can now talk to each other.

Note that this feature works with SIP phones that support auto-answer functionality.

Placing an intercom call

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Placing an intercom call (2)

  1. User A presses an intercom key that is programmed to make a call to the intercom prefix followed by user B’s phone number. Their SIP user agent sends an INVITE request to the PortaSIP server.
  2. An authorization request is sent to PortaBilling. PortaBilling performs several operations:
    • Checks that such an account exists and is allowed to use SIP services.
    • Checks whether account B belongs to the same customer.
    • Checks if the account is registered.
  3. Based on the results of these operations, PortaBilling sends an authorization response to the PortaSIP server, with a special “auto-answer” trigger.
  4. The PortaSIP server adds the “auto-answer” header to the outgoing INVITE request and sends the call to SIP user agent B.
  5. The call is answered by user’s B phone and speakerphone mode is activated immediately.

Group paging

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PBX users can make announcements via phone speakers to all hunt group members simultaneously. When an authorized user dials a hunt group number prefixed by a special code, they can start the announcement after the “beep”. This is a one-way announcement, so users can’t reply to the caller. There is no need for your PBX customers to buy a costly public address system – they can use regular IP phones instead.

For example, the receptionist in the hospital is looking for Dr. Smith. The receptionist calls 202, Dr. Smith’s extension, but there is no answer. So, the receptionist decides to make an announcement via all IP phones of the Surgical Unit (hunt group 555) that include wards 1 to 10. The receptionist dials *33555 (where *33 is a group paging prefix), and announces after the beep “Dr. Smith please come to reception. There is a package waiting for you.” All IP phones of the Surgical Unit simultaneously broadcast that announcement via speakers. Dr. Smith, who is in ward 3, hears the announcement and comes to the reception.

Benefits
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  • PBX customers can use IP phones to broadcast announcements to members of a specific hunt group and don’t need to invest money in costly hardware.
  • Service providers can attract new PBX customers, offering an alternative to expensive public address systems.
Configuration
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To configure group paging, the administrator needs to perform the following steps:

  1. Check whether the customer has a dialing rule of a “PBX” type assigned:
    1. open the Customer record > Services > Voice calls > Dialing rules;enabling dialing rules
    2. turn on the Dialing rules toggle switch if it is disabled;
    3. click Edit next to the selected Dialing rule;
    4. in the opened window, check the Type of dialing rule and the Paging/Intercom prefix on the Service codes panel. The administrator can change the prefix here if needed, but it will also change for all customers who use this dialing rule.paging/intercom prefix
  2. Turn on the Paging/Intercom toggle switch:
    1. go to Customer record > Services > Voice calls > Outgoing calls;
    2. turn on the Paging/Intercom toggle switch > Save.paging/intercom toggle
  3. On the customer self-care web interface, the customer needs to configure the extensions in a hunt group that are authorized to make paging calls:
    1. open Cloud PBX > Hunt Groups;
    2. select the needed hunt group and click Configure;
    3. click on the specific extension and select the checkbox in the Paging allowed column.paging allowed column

Now, the user can dial the *33 prefix followed by a hunt group number and make a public announcement.

Specifics
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  • If a hunt group member is on a call, they won’t hear an announcement made to the hunt group. The announcements are broadcasted through all the IP phones in a hunt group except the ones that are busy, and switched-off.
  • If a hunt group member is on a call but ends it during the announcement, they will hear the part of the announcement that is broadcasted from the moment the call ends.
  • The group paging ignores hunt sequence mode (order, simultaneous, random, or least used) and any extensions ringing delay set in a hunt group.
  • The group paging also ignores the incoming call settings of the extension, e.g., default answering mode is set to “Forward, Voicemail”.
  • 64 extensions are the maximum number of call participants, including the announcer. If the hunt group includes more extensions, only the first 63 connected IP phones will broadcast the announcement (the announcer is excluded).

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